Check if app is in foreground or not (java)

foregroundchechtask.java

class ForegroundCheckTask extends AsyncTask<Context, Void, Boolean> {

    @Override
    protected Boolean doInBackground(Context... params) {
        final Context context = params[0];
        return isAppOnForeground(context);
    }

    /**
     * Ritorna true se l'app è in background
     * @param context: il context dell'app
     * @return : true se l'app è in background
     */
    private boolean isAppOnForeground(Context context) {
        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        assert activityManager != null;
        List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
        if (appProcesses == null) {
            return false;
        }
        final String packageName = context.getPackageName();
        for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {
            if (appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND && appProcess.processName.equals(packageName)) {
                return true;
            }
        }
        return false;
    }
}