Use MainActivity as a single instance to open item on sync result notification click

app/src/main/AndroidManifest.xml

@@ -59,6 +59,7 @@
         <activity
             android:name=".activities.MainActivity"
             android:label="@string/articles"
+            android:launchMode="singleTask"
             android:theme="@style/AppTheme.NoActionBar" />
         <activity
             android:name=".activities.ItemActivity"
@@ -67,7 +68,6 @@
         <activity
             android:name=".activities.AddFeedActivity"
             android:label="@string/add_feed_title"
-            android:launchMode="singleTop"
             android:parentActivityName=".activities.MainActivity">
             <intent-filter android:label="@string/new_feed">
                 <action android:name="android.intent.action.SEND" />

app/src/main/java/com/readrops/app/activities/MainActivity.java

@@ -225,15 +225,25 @@ public class MainActivity extends AppCompatActivity implements SwipeRefreshLayou
                 savedInstanceState.clear();
             }
         });
-
-        if (getIntent().hasExtra(ITEM_ID) && getIntent().hasExtra(IMAGE_URL)) {
-            Intent intent = new Intent(this, ItemActivity.class);
-            intent.putExtras(getIntent());
-
-            startActivity(intent);
-        }
     }
 
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+
+        if (intent.hasExtra(ITEM_ID) && intent.hasExtra(IMAGE_URL)) {
+            Intent itemIntent = new Intent(this, ItemActivity.class);
+            itemIntent.putExtras(intent);
+
+            startActivity(itemIntent);
+
+            viewModel.setItemReadState(intent.getIntExtra(ITEM_ID, 0), true, true)
+                    .subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .doOnError(throwable -> Utils.showSnackbar(rootLayout, throwable.getMessage()))
+                    .subscribe();
+        }
+    }
 
     private void handleDrawerClick(IDrawerItem drawerItem) {
         if (drawerItem instanceof PrimaryDrawerItem) {

app/src/main/java/com/readrops/app/repositories/ARepository.java

@@ -109,7 +109,11 @@ public abstract class ARepository<T> {
     }
 
     public Completable setItemReadState(Item item, boolean read) {
-        return database.itemDao().setReadState(item.getId(), read, !item.isReadChanged());
+        return setItemReadState(item.getId(), read, !item.isReadChanged());
+    }
+
+    public Completable setItemReadState(int itemId, boolean read, boolean readChanged) {
+        return database.itemDao().setReadState(itemId, read, readChanged);
     }
 
     public Completable setAllItemsReadState(boolean read) {

app/src/main/java/com/readrops/app/viewmodels/MainViewModel.java

@@ -219,6 +219,10 @@ public class MainViewModel extends AndroidViewModel {
         return repository.setItemReadState(itemWithFeed.getItem(), read);
     }
 
+    public Completable setItemReadState(int itemId, boolean read, boolean readChanged) {
+        return repository.setItemReadState(itemId, read, readChanged);
+    }
+
     public Completable setItemsReadState(List<ItemWithFeed> items, boolean read) {
         List<Completable> completableList = new ArrayList<>();