gistfile1.java

private boolean isApplicationBroughtToBackground() {
  ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); 
  List<RunningTaskInfo> tasks = am.getRunningTasks(1); 
  if (!tasks.isEmpty()) {
    ComponentName topActivity = tasks.get(0).topActivity;
    if (!topActivity.getPackageName().equals(context.getPackageName())) {
      return true; 
    } 
  } 
  return false; 
}