Kitkat specific fixes

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

@@ -3,6 +3,7 @@ package gr.thmmy.mthmmy.activities.main;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.widget.Toast;
 
@@ -11,6 +12,7 @@ import com.google.android.material.tabs.TabLayout;
 import java.util.ArrayList;
 import java.util.List;
 
+import androidx.appcompat.app.AppCompatDelegate;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentPagerAdapter;
@@ -54,6 +56,13 @@ public class MainActivity extends BaseActivity implements RecentFragment.RecentF
     private ViewPager viewPager;
     private TabLayout tabLayout;
 
+    //Fix for vector drawables on android <21
+    static {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+            AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
+        }
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

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

@@ -5,6 +5,7 @@ import android.content.Context;
 import android.content.SharedPreferences;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.util.DisplayMetrics;
 import android.widget.ImageView;
@@ -25,6 +26,9 @@ import com.squareup.picasso.Picasso;
 import net.gotev.uploadservice.UploadService;
 import net.gotev.uploadservice.okhttp.OkHttpStack;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
 import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 
@@ -35,6 +39,8 @@ import gr.thmmy.mthmmy.R;
 import gr.thmmy.mthmmy.session.SessionManager;
 import gr.thmmy.mthmmy.utils.CrashReportingTree;
 import io.fabric.sdk.android.Fabric;
+import okhttp3.CipherSuite;
+import okhttp3.ConnectionSpec;
 import okhttp3.HttpUrl;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
@@ -89,7 +95,7 @@ public class BaseApplication extends Application {
 
         SharedPrefsCookiePersistor sharedPrefsCookiePersistor = new SharedPrefsCookiePersistor(getApplicationContext());
         PersistentCookieJar cookieJar = new PersistentCookieJar(new SetCookieCache(), sharedPrefsCookiePersistor);
-        client = new OkHttpClient.Builder()
+        OkHttpClient.Builder builder = new OkHttpClient.Builder()
                 .cookieJar(cookieJar)
                 .addInterceptor(chain -> {
                     Request request = chain.request();
@@ -103,8 +109,24 @@ public class BaseApplication extends Application {
                     }
                     return chain.proceed(request);
                 })
-                .callTimeout(30, TimeUnit.SECONDS)
+                .callTimeout(30, TimeUnit.SECONDS);
+
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { // Just for KitKats
+            // Necessary because our servers don't have the right cipher suites.
+            // https://github.com/square/okhttp/issues/4053
+            List<CipherSuite> cipherSuites = new ArrayList<>(ConnectionSpec.MODERN_TLS.cipherSuites());
+            cipherSuites.add(CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA);
+            cipherSuites.add(CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA);
+
+            ConnectionSpec legacyTls = new ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
+                    .cipherSuites(cipherSuites.toArray(new CipherSuite[0]))
                     .build();
+
+            builder.connectionSpecs(Arrays.asList(legacyTls, ConnectionSpec.CLEARTEXT));
+        }
+
+        client = builder.build();
+
         sessionManager = new SessionManager(client, cookieJar, sharedPrefsCookiePersistor, sharedPrefs, draftsPrefs);
         Picasso picasso = new Picasso.Builder(getApplicationContext())
                 .downloader(new OkHttp3Downloader(client))
@@ -184,8 +206,7 @@ public class BaseApplication extends Application {
             Fabric.with(this, crashlyticsKit);
             Timber.plant(new CrashReportingTree());
             Timber.i("Crashlytics enabled.");
-        }
-        else
+        } else
             Timber.i("Crashlytics were already initialized for this app session.");
     }
 }