Question

I have two Activities, A and B. Here is a normal scenario: A is running, then sends an intent to B. A is paused, and B displays. When the user presses the back button from B, B us destroyed and the user is returned to A.

However, there is a case where B needs to re-create itself. To do this, I call finish() and then startActivity() on B and that works fine. But then, when I click the back button, it shows B again, and so I need to click the back button once more to get back to A.

How can I re-start B, but still be able to press the back button only once to return to A?

Answer 1

The following will dispose of the current activity while launching the next intent:

Intent launchNext = new Intent(getApplicationContext(), NextActivity.class);
launchNext.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(launchNext);

To override the back button, use the following:

@Override
public void onBackPressed() {
    super.onBackPressed();
    this.finish(); // or do something else
}