Android - See if home key is pressed

Question

I'm making a game and if the activity is left in any way by the user (back or home key pressed), the activity needs to end the game by posting to a script and ending the activity.

I can detect if the back key is pressed, however, I cannot find any valid method to detect if the home key is pressed. I can't just end the game in the Activity_Pause method because let's say the user receives a phone call mid-game.

I understand you can't trap the event, however, has anyone found a way to see if the activity was left by the user instead of something else like a phone call sending it to the background.

This is not possible. There is a very complicated work around which is not worth it. — Hoan Nguyen, Mar 13 '13 at 00:25
If you're referring to the time based one, then I agree it's not a real solution. This really seems to be a huge problem with android. I understand not being able to trap the event, but we should at least be able to see if it was fired. — grant1842, Mar 13 '13 at 00:29
No it is not time base but you have to override a bunch of methods then you can deduct from these that a HOME KEY is pressed. But then you cannot post a script unless you use a service. — Hoan Nguyen, Mar 13 '13 at 00:49

Hoan Nguyen · Accepted Answer · 2013-03-13T17:26:20.390

1

Ok here is the work around if you insist. Android next version may just close the loophole.

boolean mKeyPress;  
boolean mUserLeaveHint;

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

@Override
protected void onUserLeaveHint()
{
    super.onUserLeaveHint();
    mUserLeaveHint = true;
}

@Override
protected void onPause()
{
    super.onPause();
    if (!mKeyPress && mUserLeaveHint)
    {
        // HOME_KEY is pressed
    }
}

edited Mar 13 '13 at 17:26

answered Mar 13 '13 at 01:27

Hoan Nguyen

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I think everything above is Ok if there is no keyboard being pressed. If there is keyboard press then once has to do some more twitch. – Hoan Nguyen Mar 24 '13 at 23:53
We've tested and find that Back key may also go through this way. – Fisher Nov 10 '18 at 19:28

score -2 · Answer 2 · edited May 23 '17 at 10:32

-2

Looks like a duplicate of this one

Android, How to receive home button click through broadcast receiver?

@Override
public boolean dispatchKeyEvent(KeyEvent keyevent) {

    if (keyevent.getKeyCode() == KeyEvent.KEYCODE_HOME) {
        //Do here what you want
        return true;
    }
    else
        return super.dispatchKeyEvent(event);
}

edited May 23 '17 at 10:32

Community

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answered Mar 13 '13 at 00:13

cloudgroup

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2

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public static final int KEYCODE_HOME Added in API level 1 Key code constant: Home key. This key is handled by the framework and is never delivered to applications. Constant Value: 3 (0x00000003) – grant1842 Mar 13 '13 at 00:17

Android - See if home key is pressed

2 Answers2

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