Android 从另一个 Fragment 更新 ListFragment 的 listView

Question

我有一个关于从我的地图片段更新 ListFragment 中的 ListView 的问题。每次调用此方法时，我都会为字符串数组分配不同的值。我应该在 Update 方法中添加什么来刷新列表视图？

Answer 1

在 ListFragment 中创建并注册BroadcastReceiver：

static final String ACTION_CUSTOM = "action";
BroadcastReceiver mReceiver;

@Override
public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   mReceiver = new BroadcastReceiver(){
        public void onReceive(android.content.Context context, Intent intent) {

            //Check for action you need
            if (intent.getAction() == ACTION_CUSTOM ){
                //Do stuff with data from intent
                intent.getExtras().getString("data");
             }
        }
    };
}

@Override
public void onResume() {
    super.onResume();
    getActivity().registerReceiver(receiver, new IntentFilter(ACTION_CUSTOM ));
}


@Override
protected void onPause() {
     super.onPause();
     getActivity().unregisterReceiver(receiver);
} 

在MapFragment中发送广播intent，当你需要改变数据时：

Intent intent = new Intent();

//Set action you need to send
intent.setAction(ACTION_CUSTOM);

//Add data to send
intent.putExtra("data", "data_value");

//Send broadcast intent
getActivity().sendBroadcast(intent);