Navigate Up to Parent Activity from Notification

Question

My question is that I have two activities, Activity A and Activity B. Activity A is the main activity, Activity B is only accessible by touching a notification.

I need to be able to touch a notification, which will open Activity B. After the user is finished with Activity B, they can press the back button or finish Activity B. When Activity B closes, Activity A should be shown. Currently, I close Activity A (which closes the entire app) and receive a push notification. I select the push notification which opens Activity B. When I close Activity B, Activity A is not shown and the entire app closes. I want Activity A to be there after finishing Activity B.

I am using Parse SDK notifications. In my custom ParsePushBroadcastReceiver I have the following code

public class MyReceiver extends ParsePushBroadcastReceiver 
{
  @Override
  public void onPushOpen(Context context, Intent intent) 
  {        

    Intent i = new Intent(context, NotificationActivity.class);
    i.putExtras(intent.getExtras());
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    context.startActivity(i);
  }
}

I have it listed in the Android Manifest. My notification activity in manifest is

<activity
        android:name=".NotificationActivity"
        android:label="@string/app_name" 
        android:windowSoftInputMode="adjustPan"
        android:screenOrientation="portrait"
        android:parentActivityName=".MainActivity">

    <meta-data
        android:name="android.support.PARENT_ACTIVITY"
        android:value=".MainActivity"/>

</activity>

In my notification activity I have the following code in onBackPressed

public class NotificationActivity extends ActionBarActivity
{...
   @Override
   public void onBackPressed() 
   {
      if(NavUtils.getParentActivityName(this) != null)
      {
        Log.d(Constants.NAVIGATION_DEBUG, "Get Parent Activity NOT NULL"); 

        NavUtils.navigateUpFromSameTask(this); 
      }
      else
      {
        Log.d(Constants.NAVIGATION_DEBUG, "Get Parent Activity NULL"); 

        super.onBackPressed();
      } 
     }
...}

Surprisely, in the logs it states that it is NOT NULL, however it doesn't navigate back to Activity A if the app was closed prior to pressing the notification. Instead the app closes. I want Activity A to show whether the app was closed when the notification was pressed or whether the app is open. THANKS!

Answer 1

You can try the following method: put some boolean extra in your intent, and then start MainActivity. That extra will be the indicator of NotificationActivity start.

public class MyReceiver extends ParsePushBroadcastReceiver 
{
  @Override
  public void onPushOpen(Context context, Intent intent) 
  {        

    Intent i = new Intent(context, MainActivity.class);
    i.putExtras(intent.getExtras());
    i.putExtra("IS_FROM_NOTIFICATION", true);
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    context.startActivity(i);
  }
}

Then in your MainActivity's onCreate() method, do something like this:

public class MainActivity extends ActionBarActivity {
...
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (getIntent().getBooleanExtra("IS_FROM_NOTIFICATION", false)) {
            startActivity(MainActivity.this, NotificationActivity.class);
        }
    } 
    // other initialization code
    ...
...
}

Then you don't need to override onBackPressed in your NotificationActivity.