Android - Back button in the title bar

Question

In many apps (Calendar, Drive, Play Store) when you tap a button and enter a new activity, the icon in the title bar turns into a back button, but for the app I am making, i

Answer 1

This is working for me.. Suppose there are two activity (Activityone,Activitytwo)

Inside Activitytwo use this code

@Override
protected void onCreate(Bundle savedInstanceState) {
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
}

On Activityone

//when you need to go second activity
startActivity(new Intent(Activityone.this, Activitytwo.class));

This should be included in second activity inside manifest file

And The result would be like this