How to catch event with hardware back button on android?

Question

How to catch event with hardware back button on android ? I need to supress user to go back and I when click on back button on phone to show message and not to go on previous activity. How to do that ?

Answer 1

you can do by this

1. override the onBackPressed() method into your Activity like this way

   public void onBackPressed(){      // do something here and don't write super.onBackPressed() } 

2. override the onKeyDown() method

   @Override public boolean onKeyDown(int keyCode, KeyEvent event) {     switch(keyCode){     case KeyEvent.KEYCODE_BACK:         // do something here          return true;     }     return super.onKeyDown(keyCode, event); } 

Answer 2

Override the method onBackPressed() in whatever Activity you want to create a different behaviour to the back button.

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