Android 判断某个Activity 是否在前台运行的实例

  /**   * 判断某个界面是否在前台   *   * @param context  Context   * @param className 界面的类名   * @return 是否在前台显示   */  public static boolean isForeground(Context context, String className) {    if (context == null || TextUtils.isEmpty(className))      return false;    ActivityManager am = (ActivityManager) context.getSystemService(ACTIVITY_SERVICE);    List<ActivityManager.RunningTaskInfo> list = am.getRunningTasks(1);//    boolean flag=false;    for (ActivityManager.RunningTaskInfo taskInfo : list) {      if (taskInfo.topActivity.getShortClassName().contains(className)) { // 说明它已经启动了//        flag = true;        return true;      }    }    return false;  }

    if(TCPHandle.isForeground(HomeActivity.this,"EvaluateForHandActivity")||TCPHandle.isForeground(HomeActivity.this,"EvaluateActivity"))    {      return;    }