check android application is in foreground or not? [duplicate]

Answer 1

@user370305's answer is error prone and discouraged by Android OS Developers (check https://groups.google.com/forum/#!msg/android-developers/zH-2bovZSLg/L2YM8Z1N-HwJ)

There is a much more simpler approach:

On a BaseActivity that all Activities extend:

protected static boolean isVisible = false;

@Override
public void onResume() {
   super.onResume();
   setVisible(true);
}

@Override
public void onPause() {
    super.onPause();
    setVisible(false);
}

Whenever you need to check if any of your application activities is in foreground just check isVisible();

To understand this approach check this answer of side-by-side activity lifecycle: Activity side-by-side lifecycle