CODEWITHSUNDEEP
androidandroid-activity
Rahul Upadhyay
Rahul Upadhyay

Reputation: 3523

Remove top activity from stack android

I am on activity A then I start Activity B from A. Now I am on activity B and starting activity C from B. While starting activity C, I want to remove both Activities A and B. I tried this way,

Intent intent = new Intent(B.this, C.class); //I'm on Activity B, moving to C
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); //this should remove the Activity A
startActivity(intent);
finish(); //Finishes activity B

My concern to do this, when my activity C started, and I press back, app should be exit. Currently its showing me Activity A.

Upvotes: 2

Views: 4543

Answers (5)

Arshad
Arshad

Reputation: 1260

Add this flag before starting your new activity 

intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)

This will clear the Activity from top of the stack

Upvotes: 0

David Wasser
David Wasser

Reputation: 95578

You can't do it this way. You need to finish() A when starting C. My favorite way of doing this is as follows:

In B, when you want to start C, do it this:

Intent intent = new Intent(B.this, A.class); //Return to the root activity: A
intent.putExtra("launchActivityC", true);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); //this will clear the entire task stack and create a new instance of A
startActivity(intent);

This will clear the entire task stack (ie: finish activity B and A) and create a new instance of activity A.

Now, in onCreate() of activity A, do this (after calling super.onCreate()):

if (getIntent().hasExtra("launchActivityC")) {
    // User wants to launch C now and finish A
    Intent intent = new Intent(this, C.class);
    startActivity(intent);
    finish();
    return; // Return immediately so we don't continue with the rest of the onCreate...
}

What you are doing is using your root activity, A, as a kind of "dispatcher".

Upvotes: 5

Sanket Shah
Sanket Shah

Reputation: 4382

Try this, 

Intent i = new Intent(activityContext, ActivityName.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(i);

Upvotes: 0

Jayeshkumar Sojitra
Jayeshkumar Sojitra

Reputation: 2511

You can add flag Intent.FLAG_ACTIVITY_CLEAR_TOP in intent to remove top activity.

Example code is given below.

Intent intent = new Intent(getApplicationContext(), Activity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);

Upvotes: 1

Praveen Sharma
Praveen Sharma

Reputation: 4348

please add intent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY); to remove your stack history also.

Upvotes: 0

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