Up to parent activity - on Android

Question

After receiving a notification in my app, clicking on it opens activity B. Activity B has a parent activity A. Here is the manifest:

Answer 1

If @Manish Mulimani's solution worked for you, then please feel free to ignore this information. It didn't work for me, and I haven't tried the code that is in OP, but here is an alternate solution if neither of those worked for you:

First, as OP did, specify the parent Activity in AndroidManifest.xml:

Then, in the code you write to show your notification, do the following:

/* The Intent you want to open when your notification is clicked */
Intent detailIntent = new Intent(context, DetailActivity.class);
/* If you have some extras or a URI, set it here for the DetailActivity */
detailIntent.setData(todaysWeatherUri);

/*
 * This Intent is the one that goes back to your MainActivity when the up 
 * arrow or back button is clicked from the DetailActivity. 
 */
Intent backToMain = new Intent(context, MainActivity.class);

PendingIntent resultPendingIntent =
        TaskStackBuilder.create(context)
                .addNextIntentWithParentStack(backToMain)
                .addNextIntent(detailIntent)
                .getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);   

I've tested this with every iteration of starting Activities that I can thin of and it works perfectly! I hope it helps you.

Here is the link for the Android Documentation from where I formed this solution.