Intent.FLAG_ACTIVITY_CLEAR_TOP doesn't deletes the activity stack

Question

I am developing the application in which i want to close whole application on button click. I know in android we should not think about to close the application because andr

Answer 1

From documentation for Intent.FLAG_ACTIVITY_CLEAR_TOP

If set, and the activity being launched is already running in the current task, then instead of launching a new instance of that activity, all of the other activities on top of it will be closed and this Intent will be delivered to the (now on top) old activity as a new Intent.

So to get it work your FinishActivity must be first one in your Activity stack. In any other cases this solution wouldn't give you anything.

You must perform several steps to perform this:

1) Make FinishActivity as your launcher activity.

2) Do not provide any view for it and start first Activity of your application directly from onCreate callback :

3) Redefine onRestart callback:

Code sample:

private boolean isNeedToContinue = true;

@Override
protected void onCreate(Bundle arg0) {
    super.onCreate(arg0);
}

@Override
protected void onResume() {
    super.onResume();
    if (isNeedToContinue) {
                    startActivity(new Intent(this,FirstVisibleActivity.class));
                    isNeedToContinue = false;
    } else {
        finish();
    }
}

@Override
protected void onRestart() {
    super.onRestart();
    finish();
    isNeedToContinue = false;
}

I guess this is all you need. Good luck!