CODEWITHSUNDEEP
androidandroid-intent
NicolasF
NicolasF

Reputation: 33

Clear back stack but keep transition animations

My application scenario looks like this :

MainActivity > TaskActivity > TaskActivity > TaskActivity > ... > MainActivity

Each TaskActivity

Previous activities do not need to be kept in back stack. Actually I want them not to be kept, given the fact that a lot of activities can be launched (causing problems of memory consumption = frequent OutOfMemory exception) and I don't allow the user to go back to previous activities.

Here is my TaskActivity :

public class TaskActivity extends FragmentActivity {

    private void launchNextTask(Task nextTask) {
        Intent intent = new Intent(TaskActivity.this, TaskActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.putExtra(TASK_KEY, nextTask);
        startActivity(intent);
    }

}

All my activites have transition animations :

overridePendingTransition(R.anim.slide_in, R.anim.slide_out);

It was working fine until I added the NEW_TASK and CLEAR_TASK flags in the intent.

So this code is working fine, I can see GC freeing memory each time I launch a TaskActivity, except activity transitions are not working anymore.

Question is : Which intent flags could I use to clear back stack each time a TaskActivity is launched, and still keep activity transitions?

Upvotes: 2

Views: 1644

Answers (1)

kha
kha

Reputation: 20023

Change your code to 

public class TaskActivity extends FragmentActivity {

    private void launchNextTask(Task nextTask) {
        Intent intent = new Intent(TaskActivity.this, TaskActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.putExtra(TASK_KEY, nextTask);
        startActivity(intent);
        overridePendingTransition(R.anim.slide_in, R.anim.slide_out);
    }
}

And it should fix your issue.

Upvotes: 1

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