Overriding the funcationality of home button

Question

In android i have been able to override the funcationality of back button very easily but for my app i need to override the home button. I am sure it can be done but how can i achieve this.

NO! you can not override android home key click event it prevented by system, only onStop method will call on home key click event. — Vijju, Mar 10 '14 at 11:17
but when press home button i want to show an alert so how can i do this. — Harshit Rathi, Mar 10 '14 at 11:19
on click of home key only onStop of activity will call, therefor displaying an alert on stop is not possible. — Vijju, Mar 10 '14 at 11:23

Sri · Answer 1 · 2014-03-10T11:23:59.470

0

@Override
public void onAttachedToWindow() {
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
    super.onAttachedToWindow();
}

and then

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
   if(keyCode == KeyEvent.KEYCODE_HOME)
    {
     Log.i("Home Button","Clicked");
    }
   if(keyCode==KeyEvent.KEYCODE_BACK)
   {
        finish();
   }
 return false;
}

edited Mar 10 '14 at 11:23

answered Mar 10 '14 at 11:18

Sri

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this method is deprecated. – Harshit Rathi Mar 10 '14 at 11:20
1

["This key is handled by the framework and is never delivered to applications."](http://developer.android.com/reference/android/view/KeyEvent.html#KEYCODE_HOME) – Michael Mar 10 '14 at 11:20

Harshal Benake · Answer 2 · 2014-03-10T11:34:43.800

0

Sorry to say but, It is not possible.Refer the link:-

http://developer.android.com/reference/android/view/KeyEvent.html#KEYCODE_HOME`

Key code constant: Home key. This key is handled by the framework and is never delivered to applications.

Many blogs suggest to use onPause() method of activity life cycle,for the same.But it takes a lot to manage.

I will suggest to use onUserLeaveHint() method.

edited Mar 10 '14 at 11:34

answered Mar 10 '14 at 11:22

Harshal Benake

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but when light is off then onPause is called but i don't want to do this. – Harshit Rathi Mar 10 '14 at 11:27
ya i know. But most of the android blogs suggest to use onpause() methods. Its very difficult to manage.Can you tell what exactly you want to do on home press. – Harshal Benake Mar 10 '14 at 11:31
I want to display an alert when press home button and app is not gone in background. – Harshit Rathi Mar 10 '14 at 11:32
try using onUserLeaveHint(). Let me know if it works for you. – Harshal Benake Mar 10 '14 at 11:35

Overriding the funcationality of home button

2 Answers2