I am working on the following code:
private class HandleBackButton implements OnKeyListener
{
@Override
public boolean onKey(View arg0, int arg1, KeyEvent arg2) {
// TODO Auto-generated method stub
if(arg1==KeyEvent.KEYCODE_BACK)
{
showResults(0);
}
return true;
}
}
I am somewhat new to android and my purpose is to operate the above code when the back button is clicked. User can click the back button any time. But, how can I set this listener to the Activity? I can't find something like this.setOnKeyListener()
.
I am using Android 2.3.3.
Just override the onKeyDown()
method of Activity.
You don't have to set a listener then.
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_BACK)
{
showResults(0);
return true;
}
return super.onKeyDown(keyCode, event);
}
Optionally you can also override onBackPressed()
if your api level is >= 5.