Application Back button android

Question

How can I detect when I press the return application button in android? it is on the right side of the home button on samsung s3. sorry I dont really know what is the name of the button.

Not the back button of the keyboard

the one that is used when you switch application not the back button on the keyboard — game on, Oct 04 '13 at 20:47

score 5 · Answer 1 · answered Oct 04 '13 at 20:48

5

It is called the Back Button. You can override its method to handle click events. Something like

@Override
public void onBackPressed()
{
    // do stuff
    super.onBackPressed();
}

answered Oct 04 '13 at 20:48

codeMagic

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score 2 · Answer 2 · answered Oct 04 '13 at 21:16

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if ((keyCode == KeyEvent.KEYCODE_BACK)) {
        Log.i("MainActivity", "Back button pressed, exiting..");
        //Your code here..
    }
    return super.onKeyDown(keyCode, event);
}

Like this. i checked if it is back button. you can look up for the right button constant inside 'KeyEvent' class.

score 1 · Answer 3 · edited May 23 '17 at 12:30

I guess you mean the button for opening the Recent Apps (the one on the right in the image):

The button at the right

There's no way to overriding it. The only method you can intercept is the Activity's onWindowFocusChanged, which is called once the recent apps is displayed, but also is been called on a lot of other different situations.

Take a look here for more info:

How to detect "Recent Apps" system button clicks (Honeycomb+)

And here if you want to avoid opening the recent apps (but it seems it doesn't work on Jellybean and up):

https://stackoverflow.com/a/17095749/1991053

Application Back button android

3 Answers3