onBackPressed() method not triggered in AppCompatActivity

Question

AppCompatActivity onBackPressed() method fails to trigger in my activity.

I see the back arrow button and get the animation when pressing it, but nothing else happens. a

Answer 1

This code works for me. Obviously there isn't all the code, but i think it can usefull for you to understand how to implements the backPressed event.

public class RedActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    ...
    final ActionBar ab = getSupportActionBar();
    ab.setHomeAsUpIndicator(R.drawable.ic_menu);
    ab.setDisplayHomeAsUpEnabled(true);
    ...
  }

  ...

  @Override
  public void onBackPressed() {
    if (isDrawerOpen()) {
      drawerLayout.closeDrawer(GravityCompat.START);
    } else if (getFragmentManager().getBackStackEntryCount() > 0) {
      getFragmentManager().popBackStack();
    } else {
     //Ask the user if they want to quit
     new AlertDialog.Builder(this).setIcon(android.R.drawable.ic_dialog_alert)
                        .setTitle(R.string.quit)
                        .setMessage(R.string.really_quit)
                        .setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() {

                            @Override
                            public void onClick(DialogInterface dialog, int which) {        
                                finish();
                            }

                        })
          .setNegativeButton(R.string.no, null)
          .show();
       }
    }
}