Question

I have an application that uses AsyncTasks to make REST calls to a server. Whenever the AsyncTask is finished, it either: shows an error dialog/calls the next activity (if the application is in foreground) or does nothing (application is in background).

I do this to avoid having an activity poping out after the application is sent to background.

I’ve seen some implementations:

1. check android application is in foreground or not?
2. Determining the current foreground application from a background task or service

Currently i’m using another, even simpler:

• onResume of each activity I set a global variable as FOREGROUND
• onPause of each activity I set a global variable as BACKGROUND

Which would you recommend?

PS
I am aware of the best practice of REST calls as described in this video https://www.youtube.com/watch?v=xHXn3Kg2IQE&list=PL73AA672847DC7B35 and in my specific case this approach seems more appropriate.

Answer 1

private boolean isAppForground() {

        ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        List<RunningAppProcessInfo> l = mActivityManager
                .getRunningAppProcesses();
        Iterator<RunningAppProcessInfo> i = l.iterator();
        while (i.hasNext()) {
            RunningAppProcessInfo info = i.next();

            if (info.uid == getApplicationInfo().uid && info.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) 
                {
                    return true;
               }
           }
        return false;
    }