google+android+5.0,Android 5.0+ getRunningTasks is deprecated

I have gone through this question and this question. But with the help of this library i can now get the list of foreground tasks using following code.

if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { //For versions less than lollipop

ActivityManager am = ((ActivityManager) getSystemService(ACTIVITY_SERVICE));

List taskInfo = am.getRunningTasks(5);

top = taskInfo.get(0).topActivity.getPackageName();

Log.v(TAG, "top app = " + top);

}else{ //For versions Lollipop and above

List processes = ProcessManager.getRunningForegroundApps(getApplicationContext());

Collections.sort(processes, new ProcessManager.ProcessComparator());

for (AndroidAppProcess process : processes) {

if (process.foreground) {

top =process.name;

Log.v(TAG,top);

}

}

}

Here, for Android 5.0+, i get all running foreground process but i'm unable to conclude which app is the top app.

Output for above code (for else condition)

com.android.vending

com.google.android.gms

com.google.android.googlequicksearchbox

com.google.android.videos

com.test1

com.naag.testing

com.example.android.gettask

Here my top app is com.google.android.videos

Now how to decide com.google.android.videos is the top app from the above list programmatically?

How does applocker (or similar to applocker) app works on 5.0+?

Hope someone helps which will be helpful for someone.