判斷目前task中的運作的activity是否為目前應用

String packageName =this.getPackageName();

List<RunningTaskInfo> appTask = activityManager.getRunningTasks(1);

if(appTask !=null)

if(appTask.size()>0)

if(appTask.get(0).topActivity.toString().contains(packageName))

isAppInFront=true;