Android - Clear task flag not working for PendingIntent

Question

I have a task stack of A > B > C. I am currently on C, and then I press the home button. I get a notification with the intent to take me to Activity A. I press the notification, and I'm at A but if I press back, I go to C, then B, then A.

I am setting up my PendingIntent like so. Anything clearly wrong with it?

final Intent notificationIntent = new Intent(mContext, ActivityA.class);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);


        PendingIntent contentIntent = PendingIntent.getActivity(myContext, 0, notificationIntent, 0);

EDIT 1:

I tried the suggestion here: Clear all activities in a task?

notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);

but I still get the same result. My activity A starts in my application task stack, I press back and go to C, then B, then A again.

I am starting to think that this is either not possible in Android or it's not possible when using a pending intent.

EDIT 2: This is not a matter of what flags are needed. More of an issue of what could be going wrong that the flags seem to have no effect.

Answer 1

if u r using solution 1 then Just remove the launchMode="singleTask" from manifest

1)

 final Intent notificationIntent = new Intent(mContext, ActivityA.class);

 notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);

 PendingIntent contentIntent = PendingIntent.getActivity(myContext, 0, notificationIntent, 0);

OR

2)

       <activity 
       android:name=".ActivityA" 
       android:theme="@style/theme_noActionBar" 
       android:noHistory="true">

OR

3)

<activity android:name=".ActivityA" android:launchMode="singleTop">

Answer 2

I had loads of problems with this, and thought I was going crazy until I uninstalled/reinstalled my App and hey presto, the code works as per many posts on Stack Overflow. I was doing the following:

Intent i = new Intent(getApplicationContext(), MainActivity.class);
i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);

PendingIntent pi = PendingIntent.getActivity(this, 0, i, 0);

and was continually getting two versions of the App. After an uninstall on one device, and re-starting the other device everything now behaves as expected with a single instance. Hope this helps you.