Display an alert dialog if the user want to cancel submitting a post or press back button when there is something written in PostXXXActivity. Minor bugs fixed.

app/src/main/java/ml/docilealligator/infinityforreddit/CancelSubmittingPostEvent.java

@@ -0,0 +1,3 @@
+package ml.docilealligator.infinityforreddit;
+
+public class CancelSubmittingPostEvent {}

app/src/main/java/ml/docilealligator/infinityforreddit/NotificationUtils.java

@@ -8,9 +8,10 @@ import androidx.core.app.NotificationCompat;
 import androidx.core.app.NotificationManagerCompat;
 
 class NotificationUtils {
-    static final String CHANNEL_POST_MEDIA = "Post Media";
+    static final String CHANNEL_SUBMIT_POST = "Submit Post";
     static final String CHANNEL_ID_NEW_MESSAGES = "new_messages";
     static final String CHANNEL_NEW_MESSAGES = "New Messages";
+    static final int SUBMIT_POST_SERVICE_NOTIFICATION_ID = 10000;
 
     private static final int SUMMARY_BASE_ID_UNREAD_MESSAGE = 0;
     private static final int NOTIFICATION_BASE_ID_UNREAD_MESSAGE = 1;

app/src/main/java/ml/docilealligator/infinityforreddit/PostImageActivity.java

@@ -30,6 +30,7 @@ import androidx.core.content.FileProvider;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 import com.bumptech.glide.request.RequestOptions;
+import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 import com.libRG.CustomTextView;
@@ -387,6 +388,33 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         switch (item.getItemId()) {
             case android.R.id.home:
+                if(isPosting) {
+                    new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                            .setTitle(R.string.cancel_submit_post)
+                            .setMessage(R.string.cancel_submit_post_detail)
+                            .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                    -> {
+                                EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                                finish();
+                            })
+                            .setNegativeButton(R.string.no, null)
+                            .show();
+                    return true;
+                } else {
+                    if(!titleEditText.getText().toString().equals("") || imageUri != null) {
+                        new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                                .setTitle(R.string.discard_post)
+                                .setMessage(R.string.discard_post_detail)
+                                .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                        -> {
+                                    EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                                    finish();
+                                })
+                                .setNegativeButton(R.string.no, null)
+                                .show();
+                        return true;
+                    }
+                }
                 finish();
                 return true;
             case R.id.action_send_post_image_activity:
@@ -441,6 +469,37 @@ public class PostImageActivity extends AppCompatActivity implements FlairBottomS
         return false;
     }
 
+    @Override
+    public void onBackPressed() {
+        if(isPosting) {
+            new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                    .setTitle(R.string.cancel_submit_post)
+                    .setMessage(R.string.cancel_submit_post_detail)
+                    .setPositiveButton(R.string.yes, (dialogInterface, i)
+                            -> {
+                        EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                        finish();
+                    })
+                    .setNegativeButton(R.string.no, null)
+                    .show();
+        } else {
+            if(!titleEditText.getText().toString().equals("") || imageUri != null) {
+                new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                        .setTitle(R.string.discard_post)
+                        .setMessage(R.string.discard_post_detail)
+                        .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                -> {
+                            EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                            finish();
+                        })
+                        .setNegativeButton(R.string.no, null)
+                        .show();
+            } else {
+                finish();
+            }
+        }
+    }
+
     @Override
     protected void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);

app/src/main/java/ml/docilealligator/infinityforreddit/PostLinkActivity.java

@@ -24,6 +24,7 @@ import androidx.core.content.ContextCompat;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 import com.bumptech.glide.request.RequestOptions;
+import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.snackbar.Snackbar;
 import com.libRG.CustomTextView;
 
@@ -319,6 +320,30 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         switch (item.getItemId()) {
             case android.R.id.home:
+                if(isPosting) {
+                    new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                            .setTitle(R.string.cancel_submit_post)
+                            .setMessage(R.string.cancel_submit_post_detail)
+                            .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                    -> {
+                                EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                                finish();
+                            })
+                            .setNegativeButton(R.string.no, null)
+                            .show();
+                    return true;
+                } else {
+                    if(!titleEditText.getText().toString().equals("") || !contentEditText.getText().toString().equals("")) {
+                        new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                                .setTitle(R.string.discard_post)
+                                .setMessage(R.string.discard_post_detail)
+                                .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                        -> finish())
+                                .setNegativeButton(R.string.no, null)
+                                .show();
+                        return true;
+                    }
+                }
                 finish();
                 return true;
             case R.id.action_send_post_link_activity:
@@ -369,6 +394,34 @@ public class PostLinkActivity extends AppCompatActivity implements FlairBottomSh
         return false;
     }
 
+    @Override
+    public void onBackPressed() {
+        if(isPosting) {
+            new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                    .setTitle(R.string.cancel_submit_post)
+                    .setMessage(R.string.cancel_submit_post_detail)
+                    .setPositiveButton(R.string.yes, (dialogInterface, i)
+                            -> {
+                        EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                        finish();
+                    })
+                    .setNegativeButton(R.string.no, null)
+                    .show();
+        } else {
+            if(!titleEditText.getText().toString().equals("") || !contentEditText.getText().toString().equals("")) {
+                new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                        .setTitle(R.string.discard_post)
+                        .setMessage(R.string.discard_post_detail)
+                        .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                -> finish())
+                        .setNegativeButton(R.string.no, null)
+                        .show();
+            } else {
+                finish();
+            }
+        }
+    }
+
     @Override
     protected void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);

app/src/main/java/ml/docilealligator/infinityforreddit/PostTextActivity.java

@@ -24,6 +24,7 @@ import androidx.core.content.ContextCompat;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 import com.bumptech.glide.request.RequestOptions;
+import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.snackbar.Snackbar;
 import com.libRG.CustomTextView;
 
@@ -323,6 +324,33 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         switch (item.getItemId()) {
             case android.R.id.home:
+                if(isPosting) {
+                    new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                            .setTitle(R.string.cancel_submit_post)
+                            .setMessage(R.string.cancel_submit_post_detail)
+                            .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                    -> {
+                                EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                                finish();
+                            })
+                            .setNegativeButton(R.string.no, null)
+                            .show();
+                    return true;
+                } else {
+                    if(!titleEditText.getText().toString().equals("") || !contentEditText.getText().toString().equals("")) {
+                        new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                                .setTitle(R.string.discard_post)
+                                .setMessage(R.string.discard_post_detail)
+                                .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                        -> {
+                                    EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                                    finish();
+                                })
+                                .setNegativeButton(R.string.no, null)
+                                .show();
+                        return true;
+                    }
+                }
                 finish();
                 return true;
             case R.id.action_send_post_text_activity:
@@ -368,6 +396,37 @@ public class PostTextActivity extends AppCompatActivity implements FlairBottomSh
         return false;
     }
 
+    @Override
+    public void onBackPressed() {
+        if(isPosting) {
+            new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                    .setTitle(R.string.cancel_submit_post)
+                    .setMessage(R.string.cancel_submit_post_detail)
+                    .setPositiveButton(R.string.yes, (dialogInterface, i)
+                            -> {
+                        EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                        finish();
+                    })
+                    .setNegativeButton(R.string.no, null)
+                    .show();
+        } else {
+            if(!titleEditText.getText().toString().equals("") || !contentEditText.getText().toString().equals("")) {
+                new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                        .setTitle(R.string.discard_post)
+                        .setMessage(R.string.discard_post_detail)
+                        .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                -> {
+                            EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                            finish();
+                        })
+                        .setNegativeButton(R.string.no, null)
+                        .show();
+            } else {
+                finish();
+            }
+        }
+    }
+
     @Override
     protected void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);

app/src/main/java/ml/docilealligator/infinityforreddit/PostVideoActivity.java

@@ -28,6 +28,7 @@ import androidx.core.content.ContextCompat;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestManager;
 import com.bumptech.glide.request.RequestOptions;
+import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 import com.libRG.CustomTextView;
@@ -382,6 +383,33 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
         switch (item.getItemId()) {
             case android.R.id.home:
+                if(isPosting) {
+                    new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                            .setTitle(R.string.cancel_submit_post)
+                            .setMessage(R.string.cancel_submit_post_detail)
+                            .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                    -> {
+                                EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                                finish();
+                            })
+                            .setNegativeButton(R.string.no, null)
+                            .show();
+                    return true;
+                } else {
+                    if(!titleEditText.getText().toString().equals("") || videoUri != null) {
+                        new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                                .setTitle(R.string.discard_post)
+                                .setMessage(R.string.discard_post_detail)
+                                .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                        -> {
+                                    EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                                    finish();
+                                })
+                                .setNegativeButton(R.string.no, null)
+                                .show();
+                        return true;
+                    }
+                }
                 finish();
                 return true;
             case R.id.action_send_post_video_activity:
@@ -436,6 +464,37 @@ public class PostVideoActivity extends AppCompatActivity implements FlairBottomS
         return false;
     }
 
+    @Override
+    public void onBackPressed() {
+        if(isPosting) {
+            new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                    .setTitle(R.string.cancel_submit_post)
+                    .setMessage(R.string.cancel_submit_post_detail)
+                    .setPositiveButton(R.string.yes, (dialogInterface, i)
+                            -> {
+                        EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                        finish();
+                    })
+                    .setNegativeButton(R.string.no, null)
+                    .show();
+        } else {
+            if(!titleEditText.getText().toString().equals("") || videoUri != null) {
+                new MaterialAlertDialogBuilder(this, R.style.MaterialAlertDialogTheme)
+                        .setTitle(R.string.discard_post)
+                        .setMessage(R.string.discard_post_detail)
+                        .setPositiveButton(R.string.yes, (dialogInterface, i)
+                                -> {
+                            EventBus.getDefault().post(new CancelSubmittingPostEvent());
+                            finish();
+                        })
+                        .setNegativeButton(R.string.no, null)
+                        .show();
+            } else {
+                finish();
+            }
+        }
+    }
+
     @Override
     protected void onStop() {
         super.onStop();

app/src/main/java/ml/docilealligator/infinityforreddit/PullNotificationWorker.java

@@ -199,7 +199,7 @@ public class PullNotificationWorker extends Worker {
 
         Call<String> call = mOauthWithoutAuthenticatorRetrofit.create(RedditAPI.class)
                 .getMessages(RedditUtils.getOAuthHeader(account.getAccessToken()),
-                        FetchMessages.WHERE_INBOX, null);
+                        FetchMessages.WHERE_UNREAD, null);
         Response<String> response = call.execute();
 
         if(response.isSuccessful()) {

app/src/main/java/ml/docilealligator/infinityforreddit/SubmitPostService.java

@@ -22,6 +22,7 @@ import com.bumptech.glide.request.target.CustomTarget;
 import com.bumptech.glide.request.transition.Transition;
 
 import org.greenrobot.eventbus.EventBus;
+import org.greenrobot.eventbus.Subscribe;
 
 import java.io.FileInputStream;
 import java.io.IOException;
@@ -67,8 +68,7 @@ public class SubmitPostService extends Service {
     @Named("upload_video")
     Retrofit mUploadVideoRetrofit;
 
-    public SubmitPostService() {
+    public SubmitPostService() {}
-    }
 
     @Override
     public IBinder onBind(Intent intent) {
@@ -79,18 +79,20 @@ public class SubmitPostService extends Service {
     public int onStartCommand(Intent intent, int flags, int startId) {
         ((Infinity) getApplication()).getAppComponent().inject(this);
 
-        mAccessToken = intent.getExtras().getString(EXTRA_ACCESS_TOKEN);
+        EventBus.getDefault().register(this);
-        subredditName = intent.getExtras().getString(EXTRA_SUBREDDIT_NAME);
+
-        title = intent.getExtras().getString(EXTRA_TITLE);
+        mAccessToken = intent.getStringExtra(EXTRA_ACCESS_TOKEN);
-        flair = intent.getExtras().getString(EXTRA_FLAIR);
+        subredditName = intent.getStringExtra(EXTRA_SUBREDDIT_NAME);
-        isSpoiler = intent.getExtras().getBoolean(EXTRA_IS_SPOILER);
+        title = intent.getStringExtra(EXTRA_TITLE);
-        isNSFW = intent.getExtras().getBoolean(EXTRA_IS_NSFW);
+        flair = intent.getStringExtra(EXTRA_FLAIR);
-        int postType = intent.getExtras().getInt(EXTRA_POST_TYPE);
+        isSpoiler = intent.getBooleanExtra(EXTRA_IS_SPOILER, false);
+        isNSFW = intent.getBooleanExtra(EXTRA_IS_NSFW, false);
+        int postType = intent.getIntExtra(EXTRA_POST_TYPE, EXTRA_POST_TEXT_OR_LINK);
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             NotificationChannel serviceChannel = new NotificationChannel(
-                    NotificationUtils.CHANNEL_POST_MEDIA,
+                    NotificationUtils.CHANNEL_SUBMIT_POST,
-                    NotificationUtils.CHANNEL_POST_MEDIA,
+                    NotificationUtils.CHANNEL_SUBMIT_POST,
                     NotificationManager.IMPORTANCE_LOW
             );
 
@@ -101,15 +103,15 @@ public class SubmitPostService extends Service {
         if(postType == EXTRA_POST_TEXT_OR_LINK) {
             content = intent.getExtras().getString(EXTRA_CONTENT);
             kind = intent.getExtras().getString(EXTRA_KIND);
-            startForeground(1, createNotification(R.string.posting));
+            startForeground(NotificationUtils.SUBMIT_POST_SERVICE_NOTIFICATION_ID, createNotification(R.string.posting));
             submitTextOrLinkPost();
         } else if(postType == EXTRA_POST_TYPE_IMAGE) {
             mediaUri = intent.getData();
-            startForeground(1, createNotification(R.string.posting_image));
+            startForeground(NotificationUtils.SUBMIT_POST_SERVICE_NOTIFICATION_ID, createNotification(R.string.posting_image));
             submitImagePost();
         } else {
             mediaUri = intent.getData();
-            startForeground(1, createNotification(R.string.posting_video));
+            startForeground(NotificationUtils.SUBMIT_POST_SERVICE_NOTIFICATION_ID, createNotification(R.string.posting_video));
             submitVideoPost();
         }
 
@@ -117,7 +119,7 @@ public class SubmitPostService extends Service {
     }
 
     private Notification createNotification(int stringResId) {
-        return new NotificationCompat.Builder(this, NotificationUtils.CHANNEL_POST_MEDIA)
+        return new NotificationCompat.Builder(this, NotificationUtils.CHANNEL_SUBMIT_POST)
                 .setContentTitle(getString(stringResId))
                 .setContentText(getString(R.string.please_wait))
                 .setSmallIcon(R.mipmap.ic_launcher_round)
@@ -131,16 +133,14 @@ public class SubmitPostService extends Service {
                     public void submitSuccessful(Post post) {
                         EventBus.getDefault().post(new SubmitTextOrLinkPostEvent(true, post, null));
 
-                        stopForeground(true);
+                        stopService();
-                        stopSelf();
                     }
 
                     @Override
                     public void submitFailed(@Nullable String errorMessage) {
                         EventBus.getDefault().post(new SubmitTextOrLinkPostEvent(false, null, errorMessage));
 
-                        stopForeground(true);
+                        stopService();
-                        stopSelf();
                     }
                 });
     }
@@ -161,16 +161,14 @@ public class SubmitPostService extends Service {
                                         EventBus.getDefault().post(new SubmitImagePostEvent(true, null));
                                         Toast.makeText(SubmitPostService.this, R.string.image_is_processing, Toast.LENGTH_SHORT).show();
 
-                                        stopForeground(true);
+                                        stopService();
-                                        stopSelf();
                                     }
 
                                     @Override
                                     public void submitFailed(@Nullable String errorMessage) {
                                         EventBus.getDefault().post(new SubmitImagePostEvent(false, errorMessage));
 
-                                        stopForeground(true);
+                                        stopService();
-                                        stopSelf();
                                     }
                                 });
                     }
@@ -204,16 +202,14 @@ public class SubmitPostService extends Service {
                                             EventBus.getDefault().post(new SubmitVideoPostEvent(true, false, null));
                                             Toast.makeText(SubmitPostService.this, R.string.video_is_processing, Toast.LENGTH_SHORT).show();
 
-                                            stopForeground(true);
+                                            stopService();
-                                            stopSelf();
                                         }
 
                                         @Override
                                         public void submitFailed(@Nullable String errorMessage) {
                                             EventBus.getDefault().post(new SubmitVideoPostEvent(false, false, errorMessage));
 
-                                            stopForeground(true);
+                                            stopService();
-                                            stopSelf();
                                         }
                                     });
                         }
@@ -227,8 +223,18 @@ public class SubmitPostService extends Service {
             e.printStackTrace();
             EventBus.getDefault().post(new SubmitVideoPostEvent(false, true, null));
 
-            stopForeground(true);
+            stopService();
-            stopSelf();
         }
     }
+
+    private void stopService() {
+        EventBus.getDefault().unregister(this);
+        stopForeground(true);
+        stopSelf();
+    }
+
+    @Subscribe
+    public void onCancelSubmittingPostEvent(CancelSubmittingPostEvent event) {
+        stopService();
+    }
 }

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

@@ -279,4 +279,11 @@
     <string name="settings_credits_material_icons_title">Material Icons</string>
 
     <string name="no_link_available">Cannot get the link</string>
+
+    <string name="cancel_submit_post">Cancel Submitting</string>
+    <string name="cancel_submit_post_detail">The post may still be submitted even if you cancel here.</string>
+    <string name="discard_post">Discard?</string>
+    <string name="discard_post_detail">All the draft will not be saved.</string>
+    <string name="yes">Yes</string>
+    <string name="no">No</string>
 </resources>