Question

Can i override the functionality of back and homebuttons(hardware) in android? i mean like clicking on home button should go tohome screen of my app instead of home screen of mobile

Answer 1

Home Buttons:

=> You can’t override the behaviour of home button.

Back Buttons:

=> In order to capture or override the default back button press in Android the following onKeyDown method can be implemented by the Activity.

 @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            moveTaskToBack(true);
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

In case of Android 2.0+ a convince method is provided as

  @Override
    public void onBackPressed() {

        // implement your override logic here
       return;
    }