Check if Activity is running from Service

Question

How can a Service check if one of it\'s application\'s Activity is running in foreground?

Answer 1

There is one flaw to most of the answers above, if your activity has some feature which triggers another activity over the top, e.g. sending an email

the topActivity will not return your package name but instead the Android activity selector package name.

Thus, it is better to check for the baseActivity instead of the topActivity.

public boolean isMainActivityRunning(String packageName) {
    ActivityManager activityManager = (ActivityManager) getSystemService (Context.ACTIVITY_SERVICE);
    List tasksInfo = activityManager.getRunningTasks(Integer.MAX_VALUE); 

    for (int i = 0; i < tasksInfo.size(); i++) {
        if (tasksInfo.get(i).baseActivity.getPackageName().toString().equals(packageName)
            return true;
    }

    return false;
}