Back to Main Activity from Notification-Created Activity

Going back to main activity after launching activity from notification

You should make stack builder while creating notification like this.

Intent resultIntent = new Intent(this, NotificationTapActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
 // Adds the back stack
stackBuilder.addParentStack(MainActivity.class);
 // Adds the Intent to the top of the stack
stackBuilder.addNextIntent(resultIntent);
// Gets a PendingIntent containing the entire back stack
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, 
PendingIntent.FLAG_UPDATE_CURRENT);

So whenever user will tap on notification, MainActivity will be inserted in stack.

One more solution in which you can handle the back press of NotoificationTapActivity. In which you can check if noting is there in stack then you can finish the current activity and starts MainActivity from there.

Back to main activity from notification-created activity

Aha, I simply need to use PendingIntent.getActivities() instead of getActivity(). Also worth mentioning is TaskStackBuilder

Here is some code:

    Intent backIntent = new Intent(ctx, MainActivity.class);
    backIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

    Intent intent = new Intent(ctx, ConversationActivity.class);
    intent.putExtra("whatever", whatever);
    final PendingIntent pendingIntent = PendingIntent.getActivities(ctx, UNIQUE_REQUEST_CODE++,
            new Intent[] {backIntent, intent}, PendingIntent.FLAG_ONE_SHOT);

Just tested it. It works like a charm. I initially suspected that there might be a problem if the app is already running, and you go to a notification. I.e. say you activity stack is (topmost on the right):

[MainActivity] [SomeActivity]

and you click a notification for ConversationActivity. Would you get:?

[MainActivity] [SomeActivity] [MainActivity] [ConversationActivity]

Well, it turns out you magically get

[MainActivity] [SomeActivity] [ConversationActivity]

which is what I wanted, but I have no idea how it does that. I haven't set any special options on any of the activities. Oh well!

Android Open MainActivity after click back button in Notification Activity

The PendingIntent you include in the notification shown by your FCM message can describe a backstack with your MainActivity below your DetailsActivity.

TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addNextIntent(new Intent(context, MainActivity.class));
stackBuilder.addNextIntent(new Intent(context, DetailsActivity.class));
PendingIntent notificationIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);

Notification opens activity, back button pressed, main activity is opened?

Your problem is in following steps as I know from your question is

1.Create notification after boot complete

2.Main activity will call on start up

3.you pressed home button so main activity will be stopped but will not destroy

4.You click on notification from status bar so your application will be resume so that you have already main activity in your back stack and notification will create new activity like you mentioned in your question NewNoteActivity activity will be push on back stack.SO at this step you have two activities in back stack

5.you pressed back button so that last activity will be destroy and your main activity will be resume But you want to go to homepage screen.

So the Your problem is in following steps as I know from your question is

1.Create notification after boot complete

2.Main activity will call on start up

3.you pressed home button so main activity will be stopped but will not destroy

4.You click on notification from status bar so your application will be resume so that you have already main activity in your back stack and notification will create new activity like you mentioned in your question NewNoteActivity activity will be push on back stack.SO at this step you have two activities in back stack

5.you pressed back button so that last activity will be destroy and your main activity will be resume But you want to open homepage activity when you pressed on back button from NewNoteActivity activity.

So the solution is that when you pressed back button from your NewNoteActivityactivity you start main activity again with Intent.FLAG_ACTIVITY_CLEAR_TOP flag so that your main activity will recreate and will receive onNewIntent() method so there you can get flag and you can finish main activity

for example

@Override
    public void onBackPressed() {
        Intent i = new Intent(this, Main.class);
    i.putExtra("exit", true);
    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(i);
    super.onBackPressed();
    }

Now you have to implement onNewIntent() method in your Main activity

On back button pressed from NewNoteActivity activity your Main activity will call onNewIntent() method so in this method you have to fetch flag variable which is passed from NewNoteActivity activity.If you get flag and if it is true then just finish the Main activity so that you will get Home screen.

EDIT

You are saying that you have any of the activity from A,B,or C is opened and you pressed back button so that this activity will be closed.If you have only one activity in stack at that time your application will be closed means you will get home screen.But if you have more than one activity and you pressed back button you have at least one activity in stack and now you click on notification so that this will open a new activity associated with your notification so that this activity will be pushed on that on back stack.Now if you pressed back button your last activity which is associated with your notification will be closed if you have not modify onBackPressed() method in that activity and then it will check back stack if any activity in back stack so that activity will be resumed or if there is no activity in back stack then your application will be closed and you will get home screen

Notification always creates new activity instead of resuming previous activity

I've solved the problem. I needed to call the setSessionActivity() method on my media session, like so:

Intent intent = new Intent(context, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, MediaPlayerContract.REQUEST_CODE,
                intent, PendingIntent.FLAG_UPDATE_CURRENT);
mediaSessionCompat.setSessionActivity(pendingIntent);

EDIT:

you can also create an intent by simply calling

setContentIntent(controller.getSessionActivity())

after calling setSessionActivity, where controller is your MediaSessionController.

How should i do from notification back to activity without new intent

If you want to call the Activity from background try this:

    Intent intent = new Intent(this, YourLauncherActivity.class);
    intent.setAction(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);

    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
            intent, 0);
    mBuilder.setContentIntent(pendingIntent);

If you click the Notification while on Homescreen the last shown Activity of your App will be get to the foreground without starting it new. If the Activity was killed by the system you will get a new Activity.

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