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I'm new to Android and i'm trying to make a project that allows user to see which applications are running. I used this code to get the packagename of the running task on top:

           if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
                List<ActivityManager.RunningAppProcessInfo> runningappInfo = activityManager.getRunningAppProcesses();
                for (ActivityManager.RunningAppProcessInfo app : runningappInfo) {
                    if (app.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND && app.importanceReasonCode == 0) {
                        Integer state = null;
                        try {
                            state = field.getInt(app);
                        } catch (IllegalAccessException e) {
                            e.printStackTrace();
                        }
                        if (state != null && state == PROCESS_STATE_TOP) {
                            currentInfo = app;
                            break;
                        }
                    }
                }
               if (currentInfo != null) {
                    current = currentInfo.processName.split(":")[0];
                }
           }else{
                List<ActivityManager.RunningTaskInfo> runningTaskInfos = activityManager.getRunningTasks(1);
                ComponentName componentInfo = runningTaskInfos.get(0).topActivity;
                current = componentInfo.getPackageName();
           }

current here is packagename of the runningtask. But this code didn't work any more after Google update the new android version Lollipop5.1.1. The method "getRunningAppProcesses" now returns a list null. I get stuck now because all other functions in my project work only if I can get the runningtask's packagename. If anybody has resolved this kind of problem, Could you please help me? Thanks a lot,

sophie281988
  • 131
  • 9

1 Answers1

1

https://code.google.com/p/android-developer-preview/issues/detail?id=2347

Android suggests to use this for finding top application. https://developer.android.com/reference/android/app/usage/UsageStatsManager.html

chanakya
  • 97
  • 8