判断App是否运行

public boolean isRun(Context context) {
        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        List list = am.getRunningTasks(100);
        boolean isAppRunning = false;
        String MY_PKG_NAME = "应用包名";
        //100表示取的最大的任务数，info.topActivity表示当前正在运行的Activity，info.baseActivity表系统后台有此进程在运行
        for (ActivityManager.RunningTaskInfo info : list) {
            if (info.topActivity.getPackageName().equals(MY_PKG_NAME) || info.baseActivity.getPackageName().equals(MY_PKG_NAME)) {
                isAppRunning = true;
                break;
            }
        }
        return isAppRunning;
    }