Overriding the functionality of back and home buttons

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;
    }

Answer 2

for back Button Override

 public void onBackPressed() {

    // implement your override logic here
   return;
}

for home key : create a home app . refer : Android Overriding home key

Answer 3

Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_HOME)) {
        Intent intent = new Intent(this, Main.class);
        startActivity(intent);             
        return true;
    }
    return super.onKeyDown(keyCode, event);
}