how to check whether the android app is in background or foreground or terminated?

Question

I want to check my application state, now easily I am getting my app in background or foreground using below code but I don’t know how to check app is killed or terminated can anyone help for this issue. Using below code I am check app in background or foreground.

public static boolean isAppIsInBackground(Context context) {
        boolean isInBackground = true;
        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
            List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
            for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
                if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                    for (String activeProcess : processInfo.pkgList) {
                        if (activeProcess.equals(context.getPackageName())) {
                            isInBackground = false;
                        }
                    }
                }
            }
        } else {
            List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
            ComponentName componentInfo = taskInfo.get(0).topActivity;
            if (componentInfo.getPackageName().equals(context.getPackageName())) {
                isInBackground = false;
            }
        }
        return isInBackground;
    }

this could be of some use : https://stackoverflow.com/questions/7601315/can-you-track-when-an-android-application-has-been-terminated — Paul Stringer, Jul 20 '17 at 10:41

score 1 · Answer 1 · answered Dec 18 '17 at 12:48

This is perfect code and check to onStop method

private boolean isAppIsInBackground(Context context) {
    boolean isInBackground = true;
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
        List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
            if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                for (String activeProcess : processInfo.pkgList) {
                    if (activeProcess.equals(context.getPackageName())) {
                        isInBackground = false;
                    }
                }
            }
        }
    } else {
        List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
        ComponentName componentInfo = taskInfo.get(0).topActivity;
        if (componentInfo.getPackageName().equals(context.getPackageName())) {
            isInBackground = false;
        }
    }
    return isInBackground;
}

score 0 · Answer 2 · answered Jul 20 '17 at 18:54

If your minSDK is 14+, general consensus seems to be using a counter in a class that implements ActivityLifecycleCallbacks (https://developer.android.com/reference/android/app/Application.ActivityLifecycleCallbacks.html). There's a youtube video that describes how Firebase uses this technique here.

how to check whether the android app is in background or foreground or terminated?

2 Answers2