androidx refactor, bottom navigation

app/build.gradle

@@ -4,13 +4,13 @@ apply plugin: 'com.android.application'
 apply plugin: 'io.fabric'
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 28
 
     defaultConfig {
         vectorDrawables.useSupportLibrary = true
         applicationId "gr.thmmy.mthmmy"
         minSdkVersion 19
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 13
         versionName "1.4.1"
         archivesBaseName = "mTHMMY-v$versionName"
@@ -25,7 +25,7 @@ android {
             def date = new Date().format('ddMMyy_HHmmss')
             archivesBaseName = archivesBaseName + "-$date"
             // Disable fabric build ID generation for debug builds
-            ext.enableCrashlytics = false;
+            ext.enableCrashlytics = false
         }
     }
 
@@ -48,15 +48,15 @@ tasks.whenTaskAdded { task ->
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
-    implementation 'com.android.support:design:27.1.1'
+    implementation 'com.google.android.material:material:1.0.0'
-    implementation 'com.android.support:preference-v7:27.1.1'
+    implementation 'androidx.preference:preference:1.0.0'
-    implementation 'com.android.support:preference-v14:27.1.1'
+    implementation 'androidx.legacy:legacy-preference-v14:1.0.0'
-    implementation 'com.android.support:support-v4:27.1.1'
+    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
-    implementation 'com.android.support:cardview-v7:27.1.1'
+    implementation 'androidx.cardview:cardview:1.0.0'
-    implementation 'com.android.support:recyclerview-v7:27.1.1'
+    implementation 'androidx.recyclerview:recyclerview:1.0.0'
     implementation 'com.google.firebase:firebase-core:16.0.3'
-    implementation 'com.google.firebase:firebase-messaging:17.3.1'
+    implementation 'com.google.firebase:firebase-messaging:17.3.2'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.9.5'
     implementation 'com.squareup.okhttp3:okhttp:3.10.0'
     implementation 'com.squareup.picasso:picasso:2.5.2'
@@ -72,10 +72,11 @@ dependencies {
     implementation 'pl.droidsonroids.gif:android-gif-drawable:1.2.15'
     implementation 'com.bignerdranch.android:expandablerecyclerview:3.0.0-RC1'//TODO: deprecated!
     implementation 'me.zhanghai.android.materialprogressbar:library:1.4.2'
-    implementation 'com.jakewharton.timber:timber:4.7.0'
+    implementation 'com.jakewharton.timber:timber:4.7.1'
     implementation 'net.gotev:uploadservice:3.4.2'
     implementation 'net.gotev:uploadservice-okhttp:3.4.2'
-    implementation 'android.arch.lifecycle:extensions:1.1.1'
+    implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0'
+    implementation 'com.google.android.material:material:1.0.0'
 }
 
 apply plugin: 'com.google.gms.google-services'

app/src/main/AndroidManifest.xml

@@ -132,7 +132,7 @@
         </activity>
 
         <provider
-            android:name="android.support.v4.content.FileProvider"
+            android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}.provider"
             android:exported="false"
             android:grantUriPermissions="true">

app/src/main/java/gr/thmmy/mthmmy/activities/AboutActivity.java

@@ -2,10 +2,10 @@ package gr.thmmy.mthmmy.activities;
 
 import android.content.pm.ActivityInfo;
 import android.os.Bundle;
-import android.support.design.widget.AppBarLayout;
+import com.google.android.material.appbar.AppBarLayout;
-import android.support.design.widget.CoordinatorLayout;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import android.support.v4.widget.DrawerLayout;
+import androidx.drawerlayout.widget.DrawerLayout;
-import android.support.v7.app.AlertDialog;
+import androidx.appcompat.app.AlertDialog;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.webkit.WebView;

app/src/main/java/gr/thmmy/mthmmy/activities/LoginActivity.java

@@ -3,8 +3,8 @@ package gr.thmmy.mthmmy.activities;
 import android.content.Intent;
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.v7.preference.PreferenceManager;
+import androidx.preference.PreferenceManager;
-import android.support.v7.widget.AppCompatButton;
+import androidx.appcompat.widget.AppCompatButton;
 import android.view.View;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;

app/src/main/java/gr/thmmy/mthmmy/activities/board/BoardActivity.java

@@ -4,11 +4,11 @@ import android.content.Intent;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.design.widget.FloatingActionButton;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import android.support.v7.app.AlertDialog;
+import androidx.appcompat.app.AlertDialog;
-import android.support.v7.widget.DividerItemDecoration;
+import androidx.recyclerview.widget.DividerItemDecoration;
-import android.support.v7.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.View;
 import android.widget.ImageButton;
 import android.widget.ProgressBar;

app/src/main/java/gr/thmmy/mthmmy/activities/board/BoardAdapter.java

@@ -5,7 +5,7 @@ import android.content.Intent;
 import android.graphics.Typeface;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/bookmarks/BoardBookmarksFragment.java

@@ -4,8 +4,8 @@ import android.app.Activity;
 import android.graphics.Typeface;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/bookmarks/BookmarkActivity.java

@@ -2,11 +2,12 @@ package gr.thmmy.mthmmy.activities.bookmarks;
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.design.widget.TabLayout;
+import com.google.android.material.tabs.TabLayout;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
-import android.support.v4.app.FragmentManager;
+import androidx.fragment.app.FragmentManager;
-import android.support.v4.app.FragmentPagerAdapter;
+import androidx.fragment.app.FragmentPagerAdapter;
-import android.support.v4.view.ViewPager;
+import androidx.fragment.app.FragmentStatePagerAdapter;
+import androidx.viewpager.widget.ViewPager;
 import android.widget.Toast;
 
 import java.util.ArrayList;
@@ -104,7 +105,7 @@ public class BookmarkActivity extends BaseActivity {
      * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
      * one of the sections/tabs/pages. If it becomes too memory intensive,
      * it may be best to switch to a
-     * {@link android.support.v4.app.FragmentStatePagerAdapter}.
+     * {@link FragmentStatePagerAdapter}.
      */
     private class SectionsPagerAdapter extends FragmentPagerAdapter {
         private final List<Fragment> fragmentList = new ArrayList<>();

app/src/main/java/gr/thmmy/mthmmy/activities/bookmarks/TopicBookmarksFragment.java

@@ -5,9 +5,9 @@ import android.graphics.Typeface;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.graphics.drawable.VectorDrawableCompat;
+import androidx.vectordrawable.graphics.drawable.VectorDrawableCompat;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/create_content/CreateContentActivity.java

@@ -4,7 +4,7 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
-import android.support.design.widget.TextInputLayout;
+import com.google.android.material.textfield.TextInputLayout;
 import android.text.InputType;
 import android.view.View;
 import android.view.inputmethod.EditorInfo;

app/src/main/java/gr/thmmy/mthmmy/activities/downloads/DownloadsActivity.java

@@ -4,10 +4,10 @@ import android.content.Intent;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.design.widget.FloatingActionButton;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import android.support.v7.widget.DividerItemDecoration;
+import androidx.recyclerview.widget.DividerItemDecoration;
-import android.support.v7.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;

app/src/main/java/gr/thmmy/mthmmy/activities/downloads/DownloadsAdapter.java

@@ -5,7 +5,7 @@ import android.content.Intent;
 import android.graphics.Typeface;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/main/MainActivity.java

@@ -4,12 +4,13 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
-import android.support.design.widget.TabLayout;
+import com.google.android.material.tabs.TabLayout;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
-import android.support.v4.app.FragmentManager;
+import androidx.fragment.app.FragmentManager;
-import android.support.v4.app.FragmentPagerAdapter;
+import androidx.fragment.app.FragmentPagerAdapter;
-import android.support.v4.view.ViewPager;
+import androidx.fragment.app.FragmentStatePagerAdapter;
-import android.support.v7.preference.PreferenceManager;
+import androidx.viewpager.widget.ViewPager;
+import androidx.preference.PreferenceManager;
 import android.widget.Toast;
 
 import java.util.ArrayList;
@@ -160,7 +161,7 @@ public class MainActivity extends BaseActivity implements RecentFragment.RecentF
      * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
      * one of the sections/tabs/pages. If it becomes too memory intensive,
      * it may be best to switch to a
-     * {@link android.support.v4.app.FragmentStatePagerAdapter}.
+     * {@link FragmentStatePagerAdapter}.
      */
     private class SectionsPagerAdapter extends FragmentPagerAdapter {
         private final List<Fragment> fragmentList = new ArrayList<>();

app/src/main/java/gr/thmmy/mthmmy/activities/main/forum/ForumAdapter.java

@@ -1,8 +1,8 @@
 package gr.thmmy.mthmmy.activities.main.forum;
 
 import android.content.Context;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/main/forum/ForumFragment.java

@@ -2,9 +2,9 @@ package gr.thmmy.mthmmy.activities.main.forum;
 
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.v4.widget.SwipeRefreshLayout;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
-import android.support.v7.widget.DividerItemDecoration;
+import androidx.recyclerview.widget.DividerItemDecoration;
-import android.support.v7.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/main/recent/RecentAdapter.java

@@ -1,8 +1,8 @@
 package gr.thmmy.mthmmy.activities.main.recent;
 
 import android.content.Context;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/main/recent/RecentFragment.java

@@ -2,9 +2,9 @@ package gr.thmmy.mthmmy.activities.main.recent;
 
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.v4.widget.SwipeRefreshLayout;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
-import android.support.v7.widget.DividerItemDecoration;
+import androidx.recyclerview.widget.DividerItemDecoration;
-import android.support.v7.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/main/unread/UnreadAdapter.java

@@ -1,7 +1,7 @@
 package gr.thmmy.mthmmy.activities.main.unread;
 
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/main/unread/UnreadFragment.java

@@ -2,10 +2,10 @@ package gr.thmmy.mthmmy.activities.main.unread;
 
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v4.widget.SwipeRefreshLayout;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
-import android.support.v7.widget.DividerItemDecoration;
+import androidx.recyclerview.widget.DividerItemDecoration;
-import android.support.v7.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/profile/ProfileActivity.java

@@ -7,14 +7,14 @@ import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.design.widget.FloatingActionButton;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import android.support.design.widget.TabLayout;
+import com.google.android.material.tabs.TabLayout;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
-import android.support.v4.app.FragmentManager;
+import androidx.fragment.app.FragmentManager;
-import android.support.v4.app.FragmentPagerAdapter;
+import androidx.fragment.app.FragmentPagerAdapter;
-import android.support.v4.content.res.ResourcesCompat;
+import androidx.core.content.res.ResourcesCompat;
-import android.support.v4.view.ViewPager;
+import androidx.viewpager.widget.ViewPager;
-import android.support.v7.app.AppCompatDelegate;
+import androidx.appcompat.app.AppCompatDelegate;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.Spanned;

app/src/main/java/gr/thmmy/mthmmy/activities/profile/latestPosts/LatestPostsAdapter.java

@@ -1,6 +1,6 @@
 package gr.thmmy.mthmmy.activities.profile.latestPosts;
 
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/profile/latestPosts/LatestPostsFragment.java

@@ -2,9 +2,9 @@ package gr.thmmy.mthmmy.activities.profile.latestPosts;
 
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.support.v7.widget.DividerItemDecoration;
+import androidx.recyclerview.widget.DividerItemDecoration;
-import android.support.v7.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/profile/stats/StatsFragment.java

@@ -4,7 +4,7 @@ import android.graphics.Color;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/activities/profile/summary/SummaryFragment.java

@@ -4,7 +4,7 @@ import android.graphics.Color;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
 import android.text.Html;
 import android.text.method.LinkMovementMethod;
 import android.view.LayoutInflater;

app/src/main/java/gr/thmmy/mthmmy/activities/settings/SettingsActivity.java

@@ -1,7 +1,7 @@
 package gr.thmmy.mthmmy.activities.settings;
 
 import android.os.Bundle;
-import android.support.v4.app.FragmentTransaction;
+import androidx.fragment.app.FragmentTransaction;
 
 import gr.thmmy.mthmmy.R;
 import gr.thmmy.mthmmy.base.BaseActivity;

app/src/main/java/gr/thmmy/mthmmy/activities/settings/SettingsFragment.java

@@ -8,10 +8,10 @@ import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.Bundle;
 import android.provider.Settings;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v7.preference.ListPreference;
+import androidx.preference.ListPreference;
-import android.support.v7.preference.Preference;
+import androidx.preference.Preference;
-import android.support.v7.preference.PreferenceFragmentCompat;
+import androidx.preference.PreferenceFragmentCompat;
 import android.view.View;
 
 import java.util.ArrayList;

app/src/main/java/gr/thmmy/mthmmy/activities/topic/TopicActivity.java

@@ -2,21 +2,20 @@ package gr.thmmy.mthmmy.activities.topic;
 
 import android.annotation.SuppressLint;
 import android.app.NotificationManager;
-import android.arch.lifecycle.ViewModelProviders;
+import androidx.lifecycle.ViewModelProviders;
 import android.content.Context;
-import android.content.DialogInterface;
 import android.content.Intent;
 import android.graphics.Rect;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
-import android.support.design.widget.FloatingActionButton;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import android.support.design.widget.Snackbar;
+import com.google.android.material.snackbar.Snackbar;
-import android.support.v4.content.res.ResourcesCompat;
+import androidx.core.content.res.ResourcesCompat;
-import android.support.v7.app.AlertDialog;
+import androidx.appcompat.app.AlertDialog;
-import android.support.v7.app.AppCompatDelegate;
+import androidx.appcompat.app.AppCompatDelegate;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.SpannableStringBuilder;
@@ -37,7 +36,6 @@ import android.widget.TextView;
 import android.widget.Toast;
 
 import java.util.ArrayList;
-import java.util.function.Consumer;
 
 import gr.thmmy.mthmmy.R;
 import gr.thmmy.mthmmy.activities.topic.tasks.EditTask;
@@ -60,7 +58,6 @@ import gr.thmmy.mthmmy.viewmodel.TopicViewModel;
 import me.zhanghai.android.materialprogressbar.MaterialProgressBar;
 import timber.log.Timber;
 
-import static gr.thmmy.mthmmy.activities.topic.Posting.replyStatus;
 import static gr.thmmy.mthmmy.services.NotificationService.NEW_POST_TAG;
 
 /**

app/src/main/java/gr/thmmy/mthmmy/activities/topic/TopicAdapter.java

@@ -2,7 +2,7 @@ package gr.thmmy.mthmmy.activities.topic;
 
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
-import android.arch.lifecycle.ViewModelProviders;
+import androidx.lifecycle.ViewModelProviders;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
@@ -11,12 +11,12 @@ import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v4.content.res.ResourcesCompat;
+import androidx.core.content.res.ResourcesCompat;
-import android.support.v7.app.AlertDialog;
+import androidx.appcompat.app.AlertDialog;
-import android.support.v7.content.res.AppCompatResources;
+import androidx.appcompat.content.res.AppCompatResources;
-import android.support.v7.widget.AppCompatButton;
+import androidx.appcompat.widget.AppCompatButton;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.text.InputType;
 import android.text.TextUtils;
 import android.util.DisplayMetrics;
@@ -80,7 +80,7 @@ import static gr.thmmy.mthmmy.activities.topic.TopicParser.USER_COLOR_YELLOW;
 import static gr.thmmy.mthmmy.base.BaseActivity.getSessionManager;
 
 /**
- * Custom {@link android.support.v7.widget.RecyclerView.Adapter} used for topics.
+ * Custom {@link RecyclerView.Adapter} used for topics.
  */
 class TopicAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
     /**

app/src/main/java/gr/thmmy/mthmmy/activities/upload/UploadActivity.java

@@ -11,11 +11,11 @@ import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.provider.MediaStore;
-import android.support.design.widget.FloatingActionButton;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import android.support.v7.content.res.AppCompatResources;
+import androidx.appcompat.content.res.AppCompatResources;
-import android.support.v7.preference.PreferenceManager;
+import androidx.preference.PreferenceManager;
-import android.support.v7.widget.AppCompatButton;
+import androidx.appcompat.widget.AppCompatButton;
-import android.support.v7.widget.AppCompatTextView;
+import androidx.appcompat.widget.AppCompatTextView;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;

app/src/main/java/gr/thmmy/mthmmy/activities/upload/UploadFieldsBuilderActivity.java

@@ -3,9 +3,9 @@ package gr.thmmy.mthmmy.activities.upload;
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
-import android.support.v7.widget.Toolbar;
+import androidx.appcompat.widget.Toolbar;
 import android.text.Editable;
 import android.text.TextWatcher;
 import android.view.View;

app/src/main/java/gr/thmmy/mthmmy/activities/upload/UploadsHelper.java

@@ -10,8 +10,8 @@ import android.media.ExifInterface;
 import android.net.Uri;
 import android.os.Environment;
 import android.provider.OpenableColumns;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 import android.widget.Toast;
 
 import java.io.BufferedInputStream;

app/src/main/java/gr/thmmy/mthmmy/base/BaseActivity.java

@@ -2,7 +2,7 @@ package gr.thmmy.mthmmy.base;
 
 import android.Manifest;
 import android.app.ProgressDialog;
-import android.arch.lifecycle.ViewModelProviders;
+import androidx.lifecycle.ViewModelProviders;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -11,13 +11,13 @@ import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.design.widget.BottomSheetDialog;
+import com.google.android.material.bottomsheet.BottomSheetDialog;
-import android.support.v4.content.ContextCompat;
+import androidx.core.content.ContextCompat;
-import android.support.v4.content.FileProvider;
+import androidx.core.content.FileProvider;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
-import android.support.v7.preference.PreferenceManager;
+import androidx.preference.PreferenceManager;
-import android.support.v7.widget.Toolbar;
+import androidx.appcompat.widget.Toolbar;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.Button;

app/src/main/java/gr/thmmy/mthmmy/base/BaseApplication.java

@@ -6,7 +6,7 @@ import android.content.SharedPreferences;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Bundle;
-import android.support.v4.content.ContextCompat;
+import androidx.core.content.ContextCompat;
 import android.util.DisplayMetrics;
 import android.widget.ImageView;
 

app/src/main/java/gr/thmmy/mthmmy/base/BaseFragment.java

@@ -2,8 +2,8 @@ package gr.thmmy.mthmmy.base;
 
 import android.content.Context;
 import android.os.Bundle;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
 
 import okhttp3.OkHttpClient;
 

app/src/main/java/gr/thmmy/mthmmy/editorview/EditorView.java

@@ -6,12 +6,12 @@ import android.app.AlertDialog;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
-import android.support.design.widget.TextInputEditText;
+import com.google.android.material.textfield.TextInputEditText;
-import android.support.design.widget.TextInputLayout;
+import com.google.android.material.textfield.TextInputLayout;
-import android.support.v7.widget.AppCompatImageButton;
+import androidx.appcompat.widget.AppCompatImageButton;
-import android.support.v7.widget.GridLayoutManager;
+import androidx.recyclerview.widget.GridLayoutManager;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.text.Editable;
 import android.text.TextUtils;
 import android.util.AttributeSet;

app/src/main/java/gr/thmmy/mthmmy/editorview/EmojiKeyboard.java

@@ -2,9 +2,9 @@ package gr.thmmy.mthmmy.editorview;
 
 import android.content.Context;
 import android.os.Handler;
-import android.support.v7.widget.AppCompatImageButton;
+import androidx.appcompat.widget.AppCompatImageButton;
-import android.support.v7.widget.GridLayoutManager;
+import androidx.recyclerview.widget.GridLayoutManager;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;

app/src/main/java/gr/thmmy/mthmmy/editorview/EmojiKeyboardAdapter.java

@@ -1,9 +1,9 @@
 package gr.thmmy.mthmmy.editorview;
 
 import android.graphics.drawable.AnimationDrawable;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v7.widget.AppCompatImageButton;
+import androidx.appcompat.widget.AppCompatImageButton;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/editorview/FormatButtonsAdapter.java

@@ -1,8 +1,8 @@
 package gr.thmmy.mthmmy.editorview;
 
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.v7.widget.AppCompatImageButton;
+import androidx.appcompat.widget.AppCompatImageButton;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

app/src/main/java/gr/thmmy/mthmmy/model/Bookmark.java

@@ -1,7 +1,7 @@
 package gr.thmmy.mthmmy.model;
 
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 import java.util.ArrayList;
 import java.util.Objects;

app/src/main/java/gr/thmmy/mthmmy/model/Post.java

@@ -1,6 +1,6 @@
 package gr.thmmy.mthmmy.model;
 
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 import java.util.ArrayList;
 import java.util.Objects;

app/src/main/java/gr/thmmy/mthmmy/services/NotificationService.java

@@ -12,9 +12,9 @@ import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.service.notification.StatusBarNotification;
-import android.support.annotation.RequiresApi;
+import androidx.annotation.RequiresApi;
-import android.support.v4.app.NotificationCompat;
+import androidx.core.app.NotificationCompat;
-import android.support.v7.preference.PreferenceManager;
+import androidx.preference.PreferenceManager;
 
 import com.google.firebase.messaging.FirebaseMessagingService;
 import com.google.firebase.messaging.RemoteMessage;
@@ -28,7 +28,7 @@ import gr.thmmy.mthmmy.base.BaseApplication;
 import gr.thmmy.mthmmy.model.PostNotification;
 import timber.log.Timber;
 
-import static android.support.v4.app.NotificationCompat.PRIORITY_MAX;
+import static androidx.core.app.NotificationCompat.PRIORITY_MAX;
 import static gr.thmmy.mthmmy.activities.settings.SettingsActivity.NOTIFICATION_LED_KEY;
 import static gr.thmmy.mthmmy.activities.settings.SettingsActivity.NOTIFICATION_VIBRATION_KEY;
 import static gr.thmmy.mthmmy.activities.settings.SettingsFragment.SELECTED_RINGTONE;

app/src/main/java/gr/thmmy/mthmmy/session/SessionManager.java

@@ -1,8 +1,8 @@
 package gr.thmmy.mthmmy.session;
 
 import android.content.SharedPreferences;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 import com.franmontiel.persistentcookiejar.PersistentCookieJar;
 import com.franmontiel.persistentcookiejar.persistence.SharedPrefsCookiePersistor;

app/src/main/java/gr/thmmy/mthmmy/utils/AppCompatSpinnerWithoutDefault.java

@@ -2,7 +2,7 @@ package gr.thmmy.mthmmy.utils;
 
 import android.annotation.SuppressLint;
 import android.content.Context;
-import android.support.v7.widget.AppCompatSpinner;
+import androidx.appcompat.widget.AppCompatSpinner;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;

app/src/main/java/gr/thmmy/mthmmy/utils/CenterVerticalSpan.java

@@ -3,7 +3,7 @@ package gr.thmmy.mthmmy.utils;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Rect;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 import android.text.style.ReplacementSpan;
 
 public class CenterVerticalSpan extends ReplacementSpan {

app/src/main/java/gr/thmmy/mthmmy/utils/CustomLinearLayoutManager.java

@@ -1,8 +1,8 @@
 package gr.thmmy.mthmmy.utils;
 
 import android.content.Context;
-import android.support.v7.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 
 import timber.log.Timber;
 

app/src/main/java/gr/thmmy/mthmmy/utils/CustomRecyclerView.java

@@ -1,9 +1,9 @@
 package gr.thmmy.mthmmy.utils;
 
 import android.content.Context;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
-import android.support.v7.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
+import androidx.recyclerview.widget.RecyclerView;
 import android.util.AttributeSet;
 
 //Custom RecyclerView, so EdgeEffect and SwipeRefresh both work

app/src/main/java/gr/thmmy/mthmmy/utils/FileUtils.java

@@ -1,6 +1,6 @@
 package gr.thmmy.mthmmy.utils;
 
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 import android.webkit.MimeTypeMap;
 
 import java.io.File;

app/src/main/java/gr/thmmy/mthmmy/utils/ScrollAwareFABBehavior.java

@@ -1,11 +1,11 @@
 package gr.thmmy.mthmmy.utils;
 
 import android.content.Context;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.design.widget.CoordinatorLayout;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import android.support.design.widget.FloatingActionButton;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import android.support.design.widget.Snackbar;
+import com.google.android.material.snackbar.Snackbar;
-import android.support.v4.view.ViewCompat;
+import androidx.core.view.ViewCompat;
 import android.util.AttributeSet;
 import android.view.View;
 

app/src/main/java/gr/thmmy/mthmmy/utils/ScrollAwareLinearBehavior.java

@@ -2,11 +2,11 @@ package gr.thmmy.mthmmy.utils;
 
 import android.animation.Animator;
 import android.content.Context;
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
-import android.support.design.widget.CoordinatorLayout;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import android.support.design.widget.Snackbar;
+import com.google.android.material.snackbar.Snackbar;
-import android.support.v4.view.ViewCompat;
+import androidx.core.view.ViewCompat;
-import android.support.v4.view.animation.FastOutSlowInInterpolator;
+import androidx.interpolator.view.animation.FastOutSlowInInterpolator;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.ViewPropertyAnimator;

app/src/main/java/gr/thmmy/mthmmy/viewmodel/BaseViewModel.java

@@ -1,8 +1,8 @@
 package gr.thmmy.mthmmy.viewmodel;
 
-import android.arch.lifecycle.LiveData;
+import androidx.lifecycle.LiveData;
-import android.arch.lifecycle.MutableLiveData;
+import androidx.lifecycle.MutableLiveData;
-import android.arch.lifecycle.ViewModel;
+import androidx.lifecycle.ViewModel;
 
 import gr.thmmy.mthmmy.model.Bookmark;
 

app/src/main/java/gr/thmmy/mthmmy/viewmodel/TopicViewModel.java

@@ -1,6 +1,6 @@
 package gr.thmmy.mthmmy.viewmodel;
 
-import android.arch.lifecycle.MutableLiveData;
+import androidx.lifecycle.MutableLiveData;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;

app/src/main/res/color/bottom_navigation_selector.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:color="@color/accent" android:state_checked="true" />
+    <item android:color="@color/white" android:state_checked="false" />
+</selector>

app/src/main/res/drawable/ic_access_time_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M11.99,2C6.47,2 2,6.48 2,12s4.47,10 9.99,10C17.52,22 22,17.52 22,12S17.52,2 11.99,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8zM12.5,7H11v6l5.25,3.15 0.75,-1.23 -4.5,-2.67z"/>
+</vector>

app/src/main/res/drawable/ic_announcement.xml

@@ -0,0 +1,6 @@
+<vector android:height="24dp" android:viewportHeight="297"
+    android:viewportWidth="297" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#ffffff"
+        android:pathData="M282.82,107.559h-25.792V10.025c0,-4.056 -2.443,-7.711 -6.19,-9.261c-3.745,-1.555 -8.059,-0.693 -10.925,2.177C195.46,47.434 157.039,68.643 132.635,78.6C106.33,89.333 90.261,89.635 90.159,89.637H14.18c-5.536,0 -10.023,4.488 -10.023,10.024v89.631c0,5.536 4.487,10.023 10.023,10.023h10.2l37.887,91.497c1.551,3.746 5.206,6.189 9.261,6.189h55.538c0.006,-0.001 0.012,-0.001 0.02,0c5.536,0 10.023,-4.488 10.023,-10.023c0,-1.588 -0.37,-3.09 -1.025,-4.424l-33.809,-81.646c22.4,4.443 73.884,21.285 137.641,85.1c1.917,1.921 4.483,2.939 7.094,2.939c0.055,0 0.109,0 0.164,0c5.468,-0.079 9.877,-4.536 9.877,-10.023c0,-0.214 -0.006,-0.428 -0.02,-0.639l-0.002,-96.896h25.792c5.536,0 10.023,-4.488 10.023,-10.024v-53.779C292.844,112.048 288.356,107.559 282.82,107.559zM24.204,109.683h55.932v69.584H24.204V109.683zM78.226,276.952l-31.139,-75.196h33.839l31.138,75.196H78.226zM100.183,180.201v-71.452c20.889,-3.123 72.28,-16.674 136.797,-75.301v84.121v0.015v53.779c0,0.008 0,0.017 0,0.025l0.002,84.111C172.466,196.876 121.072,183.326 100.183,180.201zM272.796,161.34h-15.768v-33.732h15.768V161.34z"
+        android:strokeColor="#ffffff" android:strokeWidth="1"/>
+</vector>

app/src/main/res/drawable/ic_fiber_new_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M20,4L4,4c-1.11,0 -1.99,0.89 -1.99,2L2,18c0,1.11 0.89,2 2,2h16c1.11,0 2,-0.89 2,-2L22,6c0,-1.11 -0.89,-2 -2,-2zM8.5,15L7.3,15l-2.55,-3.5L4.75,15L3.5,15L3.5,9h1.25l2.5,3.5L7.25,9L8.5,9v6zM13.5,10.26L11,10.26v1.12h2.5v1.26L11,12.64v1.11h2.5L13.5,15h-4L9.5,9h4v1.26zM20.5,14c0,0.55 -0.45,1 -1,1h-4c-0.55,0 -1,-0.45 -1,-1L14.5,9h1.25v4.51h1.13L16.88,9.99h1.25v3.51h1.12L19.25,9h1.25v5z"/>
+</vector>

app/src/main/res/drawable/ic_forum_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M21,6h-2v9L6,15v2c0,0.55 0.45,1 1,1h11l4,4L22,7c0,-0.55 -0.45,-1 -1,-1zM17,12L17,3c0,-0.55 -0.45,-1 -1,-1L3,2c-0.55,0 -1,0.45 -1,1v14l4,-4h10c0.55,0 1,-0.45 1,-1z"/>
+</vector>

app/src/main/res/layout-v21/activity_profile.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -9,14 +9,14 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.profile.ProfileActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.design.widget.CollapsingToolbarLayout
+        <com.google.android.material.appbar.CollapsingToolbarLayout
             android:id="@+id/main_collapsing"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -53,9 +53,9 @@
                     android:textColor="@color/primary_text"
                     android:visibility="gone"/>
             </LinearLayout>
-        </android.support.design.widget.CollapsingToolbarLayout>
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
@@ -72,9 +72,9 @@
                 android:text="@string/username"
                 android:textColor="@color/accent"
                 android:textSize="25sp"/>
-        </android.support.v7.widget.Toolbar>
+        </androidx.appcompat.widget.Toolbar>
 
-        <android.support.design.widget.TabLayout
+        <com.google.android.material.tabs.TabLayout
             android:id="@+id/profile_tabs"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -83,9 +83,9 @@
             app:tabMode="fixed"
             app:tabSelectedTextColor="@color/accent"
             app:tabTextColor="@color/white"/>
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-    <android.support.v4.view.ViewPager
+    <androidx.viewpager.widget.ViewPager
         android:id="@+id/profile_tab_container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -107,7 +107,7 @@
         app:mpb_indeterminateTint="@color/accent"
         app:mpb_progressStyle="horizontal"/>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/profile_fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -115,6 +115,6 @@
         android:layout_margin="@dimen/fab_margins"
         app:layout_behavior="gr.thmmy.mthmmy.utils.ScrollAwareFABBehavior"
         app:srcCompat="@drawable/ic_pm_fab"/>
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 

app/src/main/res/layout-v21/activity_topic_post_row.xml

@@ -9,7 +9,7 @@
     android:paddingStart="4dp"
     tools:ignore="SmallSp">
 
-    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/card_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -260,5 +260,5 @@
                 android:paddingLeft="16dp"
                 android:paddingRight="16dp" />
         </LinearLayout>
-    </android.support.v7.widget.CardView>
+    </androidx.cardview.widget.CardView>
 </LinearLayout>

app/src/main/res/layout/activity_about.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/main_content"
@@ -8,20 +8,20 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.AboutActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             app:popupTheme="@style/ToolbarTheme" />
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
 
     <ScrollView
@@ -171,4 +171,4 @@
             android:foregroundGravity="center"
             android:src="@drawable/fun" />
     </FrameLayout>
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_board.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -9,14 +9,14 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.topic.TopicActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
@@ -32,10 +32,10 @@
                 android:background="@null"
                 android:contentDescription="@string/bookmark"
                 app:srcCompat="@drawable/ic_bookmark_false_accent_24dp"/>
-        </android.support.v7.widget.Toolbar>
+        </androidx.appcompat.widget.Toolbar>
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/board_recycler_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -44,7 +44,7 @@
         android:background="@color/background"
         android:scrollbars="none"
         tools:context="gr.thmmy.mthmmy.activities.topic.TopicActivity">
-    </android.support.v7.widget.RecyclerView>
+    </androidx.recyclerview.widget.RecyclerView>
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"
@@ -58,7 +58,7 @@
         app:mpb_indeterminateTint="@color/accent"
         app:mpb_progressStyle="horizontal"/>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/board_fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -66,6 +66,6 @@
         android:layout_margin="@dimen/fab_margins"
         app:layout_behavior="gr.thmmy.mthmmy.utils.ScrollAwareFABBehavior"
         app:srcCompat="@drawable/ic_add_fab"/>
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 

app/src/main/res/layout/activity_bookmark.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -9,23 +9,23 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.topic.TopicActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             android:gravity="center"
             app:popupTheme="@style/ToolbarTheme">
-        </android.support.v7.widget.Toolbar>
+        </androidx.appcompat.widget.Toolbar>
 
-        <android.support.design.widget.TabLayout
+        <com.google.android.material.tabs.TabLayout
             android:id="@+id/bookmark_tabs"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -35,9 +35,9 @@
             app:tabMode="fixed"
             app:tabSelectedTextColor="@color/accent"
             app:tabTextColor="@color/white"/>
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-    <android.support.v4.view.ViewPager
+    <androidx.viewpager.widget.ViewPager
         android:id="@+id/bookmarks_container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -54,4 +54,4 @@
         app:layout_anchorGravity="bottom|center"
         app:mpb_indeterminateTint="@color/accent"
         app:mpb_progressStyle="horizontal"/>
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_create_content.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -12,24 +12,24 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-        <android.support.design.widget.AppBarLayout
+        <com.google.android.material.appbar.AppBarLayout
             android:id="@+id/appbar"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:paddingTop="@dimen/appbar_padding_top"
             android:theme="@style/ToolbarTheme">
 
-            <android.support.v7.widget.Toolbar
+            <androidx.appcompat.widget.Toolbar
                 android:id="@+id/toolbar"
                 android:layout_width="match_parent"
                 android:layout_height="?attr/actionBarSize"
                 android:background="?attr/colorPrimary"
                 android:gravity="center"
                 app:popupTheme="@style/ToolbarTheme">
-            </android.support.v7.widget.Toolbar>
+            </androidx.appcompat.widget.Toolbar>
-        </android.support.design.widget.AppBarLayout>
+        </com.google.android.material.appbar.AppBarLayout>
 
-        <android.support.design.widget.TextInputLayout
+        <com.google.android.material.textfield.TextInputLayout
             android:id="@+id/subject_input"
             android:layout_width="240dp"
             android:layout_height="wrap_content"
@@ -37,14 +37,14 @@
             android:layout_margin="16dp"
             android:hint="@string/subject">
 
-            <android.support.design.widget.TextInputEditText
+            <com.google.android.material.textfield.TextInputEditText
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:lines="1"
                 android:maxLines="1"
                 android:ellipsize="end"
                 android:inputType="text"/>
-        </android.support.design.widget.TextInputLayout>
+        </com.google.android.material.textfield.TextInputLayout>
 
         <gr.thmmy.mthmmy.editorview.EditorView
             android:id="@+id/main_content_editorview"
@@ -75,4 +75,4 @@
         app:mpb_indeterminateTint="@color/accent"
         app:mpb_progressStyle="horizontal" />
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_downloads.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -9,23 +9,23 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.downloads.DownloadsActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             app:popupTheme="@style/ToolbarTheme">
-        </android.support.v7.widget.Toolbar>
+        </androidx.appcompat.widget.Toolbar>
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/downloads_recycler_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -34,7 +34,7 @@
         android:scrollbars="none"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"
         tools:context="gr.thmmy.mthmmy.activities.downloads.DownloadsActivity">
-    </android.support.v7.widget.RecyclerView>
+    </androidx.recyclerview.widget.RecyclerView>
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"
@@ -48,7 +48,7 @@
         app:mpb_indeterminateTint="@color/accent"
         app:mpb_progressStyle="horizontal"/>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/download_fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -57,6 +57,6 @@
         android:layout_marginEnd="@dimen/fab_margins"
         app:layout_behavior="gr.thmmy.mthmmy.utils.ScrollAwareFABBehavior"
         app:srcCompat="@drawable/ic_file_upload_white_24dp"/>
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 

app/src/main/res/layout/activity_login.xml

@@ -41,7 +41,7 @@
                 android:layout_weight="0.45"/>
 
             <!--  Username Label -->
-            <android.support.design.widget.TextInputLayout
+            <com.google.android.material.textfield.TextInputLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content">
 
@@ -51,7 +51,7 @@
                     android:layout_height="wrap_content"
                     android:hint="@string/hint_username"
                     android:inputType="textPersonName"/>
-            </android.support.design.widget.TextInputLayout>
+            </com.google.android.material.textfield.TextInputLayout>
 
             <Space
                 android:layout_width="match_parent"
@@ -59,7 +59,7 @@
                 android:layout_weight="0.16"/>
 
             <!--  Password Label -->
-            <android.support.design.widget.TextInputLayout
+            <com.google.android.material.textfield.TextInputLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 app:passwordToggleEnabled="true">
@@ -70,7 +70,7 @@
                     android:layout_height="wrap_content"
                     android:hint="@string/hint_password"
                     android:inputType="textPassword"/>
-            </android.support.design.widget.TextInputLayout>
+            </com.google.android.material.textfield.TextInputLayout>
 
             <Space
                 android:layout_width="match_parent"
@@ -78,7 +78,7 @@
                 android:layout_weight="0.5"/>
 
             <!-- Login Button -->
-            <android.support.v7.widget.AppCompatButton
+            <androidx.appcompat.widget.AppCompatButton
                 android:id="@+id/btnLogin"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -92,7 +92,7 @@
                 android:layout_height="0dp"
                 android:layout_weight="0.2"/>
 
-            <android.support.v7.widget.AppCompatButton
+            <androidx.appcompat.widget.AppCompatButton
                 android:id="@+id/btnContinueAsGuest"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"

app/src/main/res/layout/activity_main.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -9,13 +9,13 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.main.MainActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.design.widget.TabLayout
+        <com.google.android.material.tabs.TabLayout
             android:id="@+id/tabs"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -24,11 +24,22 @@
             app:tabMode="fixed"
             app:tabSelectedTextColor="@color/accent"
             app:tabTextColor="@color/white"/>
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-    <android.support.v4.view.ViewPager
+    <androidx.viewpager.widget.ViewPager
         android:id="@+id/container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
-</android.support.design.widget.CoordinatorLayout>
+
+    <com.google.android.material.bottomnavigation.BottomNavigationView
+        android:id="@+id/main_bottom_navigation"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:background="@color/primary"
+        app:itemIconTint="@color/bottom_navigation_selector"
+        app:itemTextColor="@color/bottom_navigation_selector"
+        app:menu="@menu/bottom_navigation"
+        app:labelVisibilityMode="labeled"/>
+</RelativeLayout>

app/src/main/res/layout/activity_profile.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout
+<androidx.coordinatorlayout.widget.CoordinatorLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
@@ -9,14 +9,14 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.profile.ProfileActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.design.widget.CollapsingToolbarLayout
+        <com.google.android.material.appbar.CollapsingToolbarLayout
             android:id="@+id/main_collapsing"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -52,9 +52,9 @@
                     android:textColor="@color/primary_text"
                     android:visibility="gone"/>
             </LinearLayout>
-        </android.support.design.widget.CollapsingToolbarLayout>
+        </com.google.android.material.appbar.CollapsingToolbarLayout>
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
@@ -71,9 +71,9 @@
                 android:text="@string/username"
                 android:textColor="@color/accent"
                 android:textSize="25sp"/>
-        </android.support.v7.widget.Toolbar>
+        </androidx.appcompat.widget.Toolbar>
 
-        <android.support.design.widget.TabLayout
+        <com.google.android.material.tabs.TabLayout
             android:id="@+id/profile_tabs"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -82,9 +82,9 @@
             app:tabMode="fixed"
             app:tabSelectedTextColor="@color/accent"
             app:tabTextColor="@color/white"/>
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-    <android.support.v4.view.ViewPager
+    <androidx.viewpager.widget.ViewPager
         android:id="@+id/profile_tab_container"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -106,7 +106,7 @@
         app:mpb_indeterminateTint="@color/accent"
         app:mpb_progressStyle="horizontal"/>
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/profile_fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -114,6 +114,6 @@
         android:layout_margin="@dimen/fab_margins"
         app:layout_behavior="gr.thmmy.mthmmy.utils.ScrollAwareFABBehavior"
         app:srcCompat="@drawable/ic_pm_fab"/>
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 

app/src/main/res/layout/activity_settings.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/main_content"
@@ -8,21 +8,21 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.settings.SettingsActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             android:gravity="center"
             app:popupTheme="@style/ToolbarTheme" />
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
     <FrameLayout
         android:id="@+id/pref_container"
@@ -31,4 +31,4 @@
         android:background="@color/primary_light"
         app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_topic.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/main_content"
@@ -13,14 +13,14 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-        <android.support.design.widget.AppBarLayout
+        <com.google.android.material.appbar.AppBarLayout
             android:id="@+id/appbar"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:paddingTop="@dimen/appbar_padding_top"
             android:theme="@style/ToolbarTheme">
 
-            <android.support.v7.widget.Toolbar
+            <androidx.appcompat.widget.Toolbar
                 android:id="@+id/toolbar"
                 android:layout_width="match_parent"
                 android:layout_height="?attr/actionBarSize"
@@ -34,10 +34,10 @@
                     android:layout_height="wrap_content"
                     android:layout_marginStart="5dp"
                     android:textColor="@color/white" />
-            </android.support.v7.widget.Toolbar>
+            </androidx.appcompat.widget.Toolbar>
-        </android.support.design.widget.AppBarLayout>
+        </com.google.android.material.appbar.AppBarLayout>
 
-        <android.support.v7.widget.RecyclerView
+        <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/topic_recycler_view"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
@@ -141,7 +141,7 @@
         app:mpb_indeterminateTint="@color/accent"
         app:mpb_progressStyle="horizontal" />
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/topic_fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -150,6 +150,6 @@
         android:layout_marginEnd="@dimen/fab_margins"
         app:layout_behavior="gr.thmmy.mthmmy.utils.ScrollAwareFABBehavior"
         app:srcCompat="@drawable/ic_reply" />
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 

app/src/main/res/layout/activity_topic_edit_row.xml

@@ -8,7 +8,7 @@
     android:paddingEnd="4dp"
     android:paddingStart="4dp">
 
-    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/card_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -87,5 +87,5 @@
                 android:background="@color/card_background"
                 card_view:hint="Post message"/>
         </LinearLayout>
-    </android.support.v7.widget.CardView>
+    </androidx.cardview.widget.CardView>
 </FrameLayout>

app/src/main/res/layout/activity_topic_poll.xml

@@ -41,7 +41,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"/>
 
-        <android.support.v7.widget.AppCompatButton
+        <androidx.appcompat.widget.AppCompatButton
             android:id="@+id/remove_vote_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -49,7 +49,7 @@
             android:visibility="gone"
             android:layout_marginEnd="16dp"/>
 
-        <android.support.v7.widget.AppCompatButton
+        <androidx.appcompat.widget.AppCompatButton
             android:id="@+id/show_poll_results_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -57,7 +57,7 @@
             android:text="@string/show_vote_results_button"
             android:visibility="gone" />
 
-        <android.support.v7.widget.AppCompatButton
+        <androidx.appcompat.widget.AppCompatButton
             android:id="@+id/show_poll_options_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -65,7 +65,7 @@
             android:text="@string/show_vote_options_button"
             android:visibility="gone" />
 
-        <android.support.v7.widget.AppCompatButton
+        <androidx.appcompat.widget.AppCompatButton
             android:id="@+id/submit_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"

app/src/main/res/layout/activity_topic_post_row.xml

@@ -9,7 +9,7 @@
     android:paddingStart="4dp"
     tools:ignore="SmallSp">
 
-    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/card_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -259,5 +259,5 @@
                 android:paddingLeft="16dp"
                 android:paddingRight="16dp" />
         </LinearLayout>
-    </android.support.v7.widget.CardView>
+    </androidx.cardview.widget.CardView>
 </LinearLayout>

app/src/main/res/layout/activity_topic_quick_reply_row.xml

@@ -8,7 +8,7 @@
     android:paddingEnd="4dp"
     android:paddingStart="4dp">
 
-    <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
+    <androidx.cardview.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/card_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -89,5 +89,5 @@
                 android:background="@color/card_background"
                 card_view:hint="Post message" />
         </LinearLayout>
-    </android.support.v7.widget.CardView>
+    </androidx.cardview.widget.CardView>
 </FrameLayout>

app/src/main/res/layout/activity_upload.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/main_content"
@@ -8,22 +8,22 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.upload.UploadActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             app:popupTheme="@style/ToolbarTheme" />
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
-    <android.support.v4.widget.NestedScrollView
+    <androidx.core.widget.NestedScrollView
         android:id="@+id/upload_outer_scrollview"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -58,7 +58,7 @@
                     android:prompt="@string/upload_spinners_hint" />
             </LinearLayout>
 
-            <android.support.design.widget.TextInputLayout
+            <com.google.android.material.textfield.TextInputLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginBottom="6dp"
@@ -71,9 +71,9 @@
                     android:hint="@string/upload_title_hint"
                     android:inputType="text"
                     android:maxLength="500" />
-            </android.support.design.widget.TextInputLayout>
+            </com.google.android.material.textfield.TextInputLayout>
 
-            <android.support.design.widget.TextInputLayout
+            <com.google.android.material.textfield.TextInputLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginBottom="6dp"
@@ -85,9 +85,9 @@
                     android:layout_height="wrap_content"
                     android:hint="@string/upload_description_hint"
                     android:inputType="textMultiLine" />
-            </android.support.design.widget.TextInputLayout>
+            </com.google.android.material.textfield.TextInputLayout>
 
-            <android.support.v7.widget.AppCompatButton
+            <androidx.appcompat.widget.AppCompatButton
                 android:id="@+id/upload_title_description_builder"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -97,7 +97,7 @@
                 android:textAlignment="center"
                 android:textColor="@color/accent" />
 
-            <android.support.v7.widget.AppCompatTextView
+            <androidx.appcompat.widget.AppCompatTextView
                 android:id="@+id/upload_filename"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
@@ -118,7 +118,7 @@
                     android:layout_height="0dp"
                     android:layout_weight="1" />
 
-                <android.support.v7.widget.AppCompatButton
+                <androidx.appcompat.widget.AppCompatButton
                     android:id="@+id/upload_select_file_button"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -134,7 +134,7 @@
                     android:layout_height="0dp"
                     android:layout_weight="1" />
 
-                <android.support.v7.widget.AppCompatButton
+                <androidx.appcompat.widget.AppCompatButton
                     android:id="@+id/upload_take_photo_button"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -146,7 +146,7 @@
                     android:textColor="@color/primary_text" />
             </LinearLayout>
         </LinearLayout>
-    </android.support.v4.widget.NestedScrollView>
+    </androidx.core.widget.NestedScrollView>
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"
@@ -160,7 +160,7 @@
         app:mpb_indeterminateTint="@color/accent"
         app:mpb_progressStyle="horizontal" />
 
-    <android.support.design.widget.FloatingActionButton
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
         android:id="@+id/upload_fab"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -170,4 +170,4 @@
         app:layout_behavior="gr.thmmy.mthmmy.utils.ScrollAwareFABBehavior"
         app:srcCompat="@drawable/ic_file_upload_white_24dp" />
 
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/activity_upload_fields_builder.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
@@ -7,21 +7,21 @@
     android:fitsSystemWindows="true"
     tools:context=".activities.upload.UploadFieldsBuilderActivity">
 
-    <android.support.design.widget.AppBarLayout
+    <com.google.android.material.appbar.AppBarLayout
         android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="@dimen/appbar_padding_top"
         android:theme="@style/ToolbarTheme">
 
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
             android:gravity="center"
             app:popupTheme="@style/ToolbarTheme" />
-    </android.support.design.widget.AppBarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
 
     <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="match_parent"
@@ -58,7 +58,7 @@
                 android:layout_marginTop="6dp"
                 android:orientation="vertical">
 
-                <android.support.v7.widget.AppCompatRadioButton
+                <androidx.appcompat.widget.AppCompatRadioButton
                     android:id="@+id/upload_fields_builder_radio_button_exams"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -67,7 +67,7 @@
                     android:text="@string/upload_fields_builder_radio_button_exams"
                     android:textColor="@color/primary_text" />
 
-                <android.support.v7.widget.AppCompatRadioButton
+                <androidx.appcompat.widget.AppCompatRadioButton
                     android:id="@+id/upload_fields_builder_radio_button_exam_solutions"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -76,7 +76,7 @@
                     android:text="@string/upload_fields_builder_radio_button_exam_solutions"
                     android:textColor="@color/primary_text" />
 
-                <android.support.v7.widget.AppCompatRadioButton
+                <androidx.appcompat.widget.AppCompatRadioButton
                     android:id="@+id/upload_fields_builder_radio_button_notes"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -110,7 +110,7 @@
                     android:layout_marginTop="6dp"
                     android:orientation="vertical">
 
-                    <android.support.v7.widget.AppCompatRadioButton
+                    <androidx.appcompat.widget.AppCompatRadioButton
                         android:id="@+id/upload_fields_builder_radio_button_feb"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
@@ -119,7 +119,7 @@
                         android:text="@string/upload_fields_builder_radio_button_feb"
                         android:textColor="@color/primary_text" />
 
-                    <android.support.v7.widget.AppCompatRadioButton
+                    <androidx.appcompat.widget.AppCompatRadioButton
                         android:id="@+id/upload_fields_builder_radio_button_jun"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
@@ -128,7 +128,7 @@
                         android:text="@string/upload_fields_builder_radio_button_exam_jun"
                         android:textColor="@color/primary_text" />
 
-                    <android.support.v7.widget.AppCompatRadioButton
+                    <androidx.appcompat.widget.AppCompatRadioButton
                         android:id="@+id/upload_fields_builder_radio_button_sept"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
@@ -150,7 +150,7 @@
                 android:textColor="@color/accent" />
 
 
-            <android.support.design.widget.TextInputLayout
+            <com.google.android.material.textfield.TextInputLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginBottom="6dp"
@@ -163,9 +163,9 @@
                     android:ems="4"
                     android:hint="@string/upload_fields_builder_year_hint"
                     android:inputType="number" />
-            </android.support.design.widget.TextInputLayout>
+            </com.google.android.material.textfield.TextInputLayout>
 
-            <android.support.v7.widget.AppCompatButton
+            <androidx.appcompat.widget.AppCompatButton
                 android:id="@+id/upload_fields_builder_submit"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -174,4 +174,4 @@
                 android:textColor="@color/accent" />
         </LinearLayout>
     </ScrollView>
-</android.support.design.widget.CoordinatorLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/dialog_create_link.xml

@@ -5,23 +5,23 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <android.support.design.widget.TextInputLayout
+    <com.google.android.material.textfield.TextInputLayout
         android:id="@+id/link_url_input"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:hint="@string/dialog_link_url_hint">
-        <android.support.design.widget.TextInputEditText
+        <com.google.android.material.textfield.TextInputEditText
             android:layout_width="256dp"
             android:layout_height="wrap_content" />
-    </android.support.design.widget.TextInputLayout>
+    </com.google.android.material.textfield.TextInputLayout>
 
-    <android.support.design.widget.TextInputLayout
+    <com.google.android.material.textfield.TextInputLayout
         android:id="@+id/link_text_input"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:hint="@string/dialog_link_text_hint">
-        <android.support.design.widget.TextInputEditText
+        <com.google.android.material.textfield.TextInputEditText
             android:layout_width="256dp"
             android:layout_height="wrap_content" />
-    </android.support.design.widget.TextInputLayout>
+    </com.google.android.material.textfield.TextInputLayout>
 </LinearLayout>

app/src/main/res/layout/editor_view.xml

@@ -4,7 +4,7 @@
     android:layout_width="wrap_content"
     android:layout_height="wrap_content">
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/buttons_recyclerview"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"/>
@@ -15,7 +15,7 @@
         android:orientation="horizontal"
         android:layout_marginTop="4dp">
 
-        <android.support.design.widget.TextInputLayout
+        <com.google.android.material.textfield.TextInputLayout
             android:id="@+id/editor_edittext_wrapper"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
@@ -23,14 +23,14 @@
             android:orientation="vertical"
             app:hintEnabled="false">
 
-            <android.support.design.widget.TextInputEditText
+            <com.google.android.material.textfield.TextInputEditText
                 android:id="@+id/editor_edittext"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:inputType="textMultiLine" />
-        </android.support.design.widget.TextInputLayout>
+        </com.google.android.material.textfield.TextInputLayout>
 
-        <android.support.v7.widget.AppCompatImageButton
+        <androidx.appcompat.widget.AppCompatImageButton
             android:id="@+id/emoji_keyboard_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -39,7 +39,7 @@
             app:srcCompat="@drawable/ic_tag_faces_24dp"
             android:background="?android:selectableItemBackground"/>
 
-        <android.support.v7.widget.AppCompatImageButton
+        <androidx.appcompat.widget.AppCompatImageButton
             android:id="@+id/submit_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"

app/src/main/res/layout/emoji_keyboard.xml

@@ -10,7 +10,7 @@
         android:layout_height="1dp"
         android:background="#000000" />
 
-    <android.support.v7.widget.AppCompatImageButton
+    <androidx.appcompat.widget.AppCompatImageButton
         android:id="@+id/backspace_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
@@ -19,7 +19,7 @@
         android:padding="6dp"
         app:srcCompat="@drawable/ic_backspace_black_24dp" />
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/emoji_recyclerview"
         android:scrollbars="vertical"
         android:layout_width="match_parent"

app/src/main/res/layout/emoji_keyboard_grid_cell.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.widget.AppCompatImageButton
+<androidx.appcompat.widget.AppCompatImageButton
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_height="wrap_content"
     android:layout_width="match_parent"

app/src/main/res/layout/format_button_grid_cell.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.widget.AppCompatImageButton
+<androidx.appcompat.widget.AppCompatImageButton
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/bold_button"
     android:layout_width="wrap_content"

app/src/main/res/layout/fragment_bookmarks.xml

@@ -4,7 +4,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent" android:layout_height="match_parent">
 
-    <android.support.v4.widget.NestedScrollView
+    <androidx.core.widget.NestedScrollView
         android:id="@+id/bookmarks_nested_scroll"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -21,5 +21,5 @@
             android:showDividers="middle"
             android:divider="?android:listDivider"
             android:dividerPadding="16dp"/>
-    </android.support.v4.widget.NestedScrollView>
+    </androidx.core.widget.NestedScrollView>
 </RelativeLayout>

app/src/main/res/layout/fragment_forum.xml

@@ -6,7 +6,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <android.support.v4.widget.SwipeRefreshLayout
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
         android:id="@+id/swiperefresh"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
@@ -21,7 +21,7 @@
             android:paddingTop="4dp"
             app:layoutManager="LinearLayoutManager"
             tools:context=".activities.main.forum.ForumFragment" />
-    </android.support.v4.widget.SwipeRefreshLayout>
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"

app/src/main/res/layout/fragment_latest_posts.xml

@@ -5,13 +5,13 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/profile_latest_posts_recycler"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="@color/background"
         android:scrollbars="none">
-    </android.support.v7.widget.RecyclerView>
+    </androidx.recyclerview.widget.RecyclerView>
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"

app/src/main/res/layout/fragment_recent.xml

@@ -6,7 +6,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <android.support.v4.widget.SwipeRefreshLayout
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
         android:id="@+id/swiperefresh"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
@@ -22,7 +22,7 @@
             app:layoutManager="LinearLayoutManager"
             tools:context=".activities.main.recent.RecentFragment"
             tools:listitem="@layout/fragment_recent_row"/>
-    </android.support.v4.widget.SwipeRefreshLayout>
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"

app/src/main/res/layout/fragment_stats.xml

@@ -5,7 +5,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <android.support.v4.widget.NestedScrollView
+    <androidx.core.widget.NestedScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginBottom="4dp"
@@ -85,7 +85,7 @@
                 android:layout_height="250dp"
                 android:layout_marginBottom="4dp"/>
         </LinearLayout>
-    </android.support.v4.widget.NestedScrollView>
+    </androidx.core.widget.NestedScrollView>
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"

app/src/main/res/layout/fragment_summary.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v4.widget.NestedScrollView
+<androidx.core.widget.NestedScrollView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/nested_scroll"
     android:layout_width="match_parent"
@@ -16,4 +16,4 @@
         android:gravity="center"
         android:orientation="vertical">
     </LinearLayout>
-</android.support.v4.widget.NestedScrollView>
+</androidx.core.widget.NestedScrollView>

app/src/main/res/layout/fragment_unread.xml

@@ -6,7 +6,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <android.support.v4.widget.SwipeRefreshLayout
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
         android:id="@+id/swiperefresh"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
@@ -22,7 +22,7 @@
             app:layoutManager="LinearLayoutManager"
             tools:context=".activities.main.unread.UnreadFragment"
             tools:listitem="@layout/fragment_unread_row"/>
-    </android.support.v4.widget.SwipeRefreshLayout>
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar
         android:id="@+id/progressBar"

app/src/main/res/menu/bottom_navigation.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/action_recent"
+        android:icon="@drawable/ic_access_time_white_24dp"
+        android:title="@string/recent" />
+
+    <item
+        android:id="@+id/action_forum"
+        android:icon="@drawable/ic_forum_white_24dp"
+        android:title="@string/forum" />
+
+    <item
+        android:id="@+id/action_unread"
+        android:icon="@drawable/ic_fiber_new_white_24dp"
+        android:title="@string/unread" />
+    <item
+        android:id="@+id/action_shoutbox"
+        android:icon="@drawable/ic_announcement"
+        android:title="@string/shoutbox" />
+</menu>

app/src/main/res/values/strings.xml

@@ -15,6 +15,12 @@
     <string name="ok">OK</string>
     <string name="cancel">Cancel</string>
 
+    <!--Main Activity-->
+    <string name="recent">Recent</string>
+    <string name="forum">Forum</string>
+    <string name="unread">Unread</string>
+    <string name="shoutbox">Shoutbox</string>
+
     <!--Login Activity-->
     <string name="thmmy_img_description">thmmy.gr</string>
     <string name="hint_username">Username</string>

app/src/main/res/xml/app_preferences.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v7.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
+<androidx.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <android.support.v7.preference.PreferenceCategory android:title="@string/pref_category_app">
+    <androidx.preference.PreferenceCategory android:title="@string/pref_category_app">
 
         <android.support.v7.preference.ListPreference
             android:defaultValue="0"
@@ -12,9 +12,9 @@
             android:summary="@string/pref_summary_app_main_default_tab"
             android:title="@string/pref_title_app_main_default_tab" />
 
-    </android.support.v7.preference.PreferenceCategory>
+    </androidx.preference.PreferenceCategory>
 
-    <android.support.v7.preference.PreferenceCategory android:title="@string/pref_category_notifications">
+    <androidx.preference.PreferenceCategory android:title="@string/pref_category_notifications">
 
         <!--<android.support.v7.preference.SwitchPreferenceCompat
             android:defaultValue="true"
@@ -38,9 +38,9 @@
             android:summary="@string/pref_summary_notifications_sound"
             android:title="@string/pref_title_notifications_sound" />
 
-    </android.support.v7.preference.PreferenceCategory>
+    </androidx.preference.PreferenceCategory>
 
-    <android.support.v7.preference.PreferenceCategory
+    <androidx.preference.PreferenceCategory
         android:key="pref_category_posting_key"
         android:title="@string/pref_category_posting">
 
@@ -50,9 +50,9 @@
             android:summary="@string/pref_summary_posting_app_signature_enable"
             android:title="@string/pref_title_posting_app_signature_enable" />
 
-    </android.support.v7.preference.PreferenceCategory>
+    </androidx.preference.PreferenceCategory>
 
-    <android.support.v7.preference.PreferenceCategory
+    <androidx.preference.PreferenceCategory
         android:key="pref_category_uploading_key"
         android:title="@string/pref_category_uploading">
 
@@ -62,6 +62,6 @@
             android:summary="@string/pref_summary_uploading_app_signature_enable"
             android:title="@string/pref_title_uploading_app_signature_enable" />
 
-    </android.support.v7.preference.PreferenceCategory>
+    </androidx.preference.PreferenceCategory>
 
-</android.support.v7.preference.PreferenceScreen>
+</androidx.preference.PreferenceScreen>

gradle.properties

@@ -9,6 +9,8 @@
 
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
+android.enableJetifier=true
+android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536m
 
 # When configured, Gradle will run in incubating parallel mode.