Various fixes

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

@@ -360,6 +360,8 @@ public class UploadActivity extends BaseActivity {
 
                     if (!editTextFilename.equals(selectedFileFilename)) {
                         //File should be uploaded with a different name
+
+                        if (checkPerms()) {
                             if (!uploadFile.isCameraPhoto()) {
                                 //Temporarily copies the file to a another location and renames it
                                 tempFileUri = UploadsHelper.createTempFile(this, storage,
@@ -384,6 +386,12 @@ public class UploadActivity extends BaseActivity {
                                 uploadFile.setFileUri(FileProvider.getUriForFile(this, getPackageName() +
                                         ".provider", uploadFile.getPhotoFile()));
                             }
+                        } else {
+                            requestPerms(UPLOAD_REQUEST_STORAGE_CODE);
+                            zipTask = null;
+                            dialog.cancel();
+                            return;
+                        }
                     }
                 } else {
                     Uri[] filesListArray = new Uri[filesList.size()];
@@ -586,8 +594,9 @@ public class UploadActivity extends BaseActivity {
             if (previousName.isEmpty()) {
                 uploadFilename.setText(data.getStringExtra(RESULT_FILENAME));
             } else {
+                String extractedExtension = FileUtils.getFileExtension(previousName);
                 String filenameWithExtension = data.getStringExtra(RESULT_FILENAME) +
-                        FileUtils.getFileExtension(previousName);
+                        (extractedExtension != null ? extractedExtension : "");
                 uploadFilename.setText(filenameWithExtension);
             }
             hasModifiedFilename = true;
@@ -617,6 +626,8 @@ public class UploadActivity extends BaseActivity {
 
                     zipTask.execute(filesListArray);
                     finish();
+                } else {
+                    Toast.makeText(this, "Please retry uploading.", Toast.LENGTH_SHORT).show();
                 }
                 break;
         }

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

@@ -390,9 +390,9 @@ public class UploadFieldsBuilderActivity extends BaseActivity {
             return greeklish ? "hlektronikh_1" : "Ηλεκτρονική 1";
         } else if (normalisedCourse.contains(("Ηλεκτρονικές Διατάξεις και Μετρήσεις"))) {
             return greeklish ? "hlektron_diatakseis_metrhseis" : "Ηλεκτρονικές Διατάξεις και Μετρήσεις";
-        } else if (normalisedCourse.contains(("Ηλεκτρονικά Iσχύος II"))) {
+        } else if (normalisedCourse.contains(("Ηλεκτρονικά Ισχύος II"))) {
             return greeklish ? "isxyos_II" : "Ισχύος 2";
-        } else if (normalisedCourse.contains(("Ηλεκτρονικά Iσχύος I"))) {
+        } else if (normalisedCourse.contains(("Ηλεκτρονικά Ισχύος I"))) {
             return greeklish ? "isxyos_I" : "Ισχύος 1";
         } else if (normalisedCourse.contains(("Ηλεκτρομαγνητικό Πεδίο II"))) {
             return greeklish ? "pedio_II" : "Πεδίο 2";

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

@@ -42,7 +42,6 @@
         android:layout_marginTop="64dp"
         android:background="@color/background"
         android:scrollbars="none"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior"
         tools:context="gr.thmmy.mthmmy.activities.topic.TopicActivity" />
 
     <me.zhanghai.android.materialprogressbar.MaterialProgressBar

app/src/main/res/xml-v26/app_preferences_user.xml

@@ -28,7 +28,7 @@
             app:iconSpaceReserved="false" />
     </androidx.preference.PreferenceCategory>
 
-    <!--<androidx.preference.PreferenceCategory
+    <androidx.preference.PreferenceCategory
         android:key="pref_category_uploading_key"
         android:title="@string/pref_category_uploading"
         app:iconSpaceReserved="false">
@@ -38,7 +38,7 @@
             android:title="@string/pref_title_uploading_app_signature_enable"
             android:summary="@string/pref_summary_uploading_app_signature_enable"
             app:iconSpaceReserved="false" />
-    </androidx.preference.PreferenceCategory>-->
+    </androidx.preference.PreferenceCategory>
 
     <androidx.preference.PreferenceCategory
         android:key="pref_category_privacy_key"