如何将数据从BroadcastReceiver发送到android中的Fragment [英] How to send data from BroadcastReceiver to Fragment in android

问题描述

我试图做一个聊天app.I有一个 SlidingDrawer Activity，它有很多片段，其中 ChatFragment 是one.Now当我发送消息给我的朋友，我有一个聊天窗口，如果有任何消息来自 GCM 服务和我在 ChatFragment 然后这条消息将去该片段和更新列表视图，因为当聊天时，任何消息来时，我想更新chatWindow现在我试过了如下所示。


GcmIntentService：

 公共类GcmIntentService扩展IntentService {
 
 public GcmIntentService（）{
 super（GcmIntentService）; 
 
 
 @Override 
 protected void onHandleIntent（意图意图）{
 Bundle extras = intent.getExtras（）; 
 GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance（this）; 
 // getMessageType（）意图参数必须是您在BroadcastReceiver中收到
 //的意图。 
字符串messageType = gcm.getMessageType（intent）; 
 
 if（extras！= null&&！extras.isEmpty（））{//有不合适的效果Bundle 
 //因为我们没有使用双向信息， （GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals（messageType））{
 Logger.getLogger（GCM_RECEIVED）.log（Level.INFO，extras.toString（））;我们真的需要检查
。 
 
 showToast（extras.getString（message））; 
 Intent sendData = new Intent（chatupdater）; 
 sendData.putExtra（msg，extras.getString（message））; 
 LocalBroadcastManager.getInstance（this）.sendBroadcast（sendData）; 
 Log.i（聊天，我在GCMIntentService）; 
 
 
} 
} 
 GcmBroadcastReceiver.completeWakefulIntent（intent）; 
 
 $ / code> 

这里我在onHandleIntent（）中启动一个broadcastreceiver。





ChatBroadCastReceiver：

  public class ChatBroadCastReceiver extends BroadcastReceiver {
 
 @Override 
 public void onReceive（Context context，Intent intent）{
 Log.i（chat，我在ChatBroadCastReceiver）; 
 String msg = intent.getStringExtra（msg）; 
 Log.i（聊天，味精）; 
 
 
 
 // Intent data = new Intent（chatupdater）; 
 // Intent data = new Intent（chatupdater）; 
 //data.putExtra(\"key\",\"data）; 
 //data.putInt(\"fragmentno\",1）; //传递我们之前讨论过的片段的唯一ID 
 //context.sendBroadcast（intent）; 
 
 
} 
} 
  

这是我的 ChatBroadCastReceiver 类，如果有消息传入，它会在 onReceive（）方法中成功接收。现在我想发送这条消息到Fragment.What我试过了，我注册了它的片段，并尝试获取相同的数据在 onReceive（）的 ChatFragment 。但它没有调用。我尝试通过日志记录来查看。

  public class ChatFragment extends Fragment {
 
 // ChatBroadCastReceiver mReceiver; 
 private EditText et_chat; 
捆绑mailData; 
字符串caller_mail; 
私人ListView chatListview; 
私人ChatWindowAdapter chatWindowAdapter; 
私人列表< ChatSession> PreviousChatSession; 
私人列表< ChatInfo> chatListItems; 
按钮chat_send; 
 public ChatFragment（）{
 
} 
 
 public BroadcastReceiver mReceiver = new BroadcastReceiver（）{
 @Override 
 public void onReceive（Context意图）{
 Log.i（聊天，我在BroadCastReceiver）; 
 String msg = intent.getStringExtra（msg）; 
 Toast.makeText（getActivity（），msg，Toast.LENGTH_LONG）.show（）; 
} 
}; 
 
 @Override 
 public void onCreate（Bundle savedInstanceState）{
 
 super.onCreate（savedInstanceState）; 
 mReceiver = new ChatBroadCastReceiver（）; 
 //getActivity().registerReceiver（new ChatBroadCastReceiver（），new IntentFilter（chatupdater））; 
 LocalBroadcastManager.getInstance（getActivity（））。registerReceiver（new ChatBroadCastReceiver（），new IntentFilter（chatupdater））; 
 Log.i（聊天，我在onCreate）; 
 
 
 
 
 
 $ b $ p现在我怎么能得到我的消息进入BroadcastReceiver的ChatReader（）的ChatFragment ??  
解决方案
注册您的广播您正在使用： 
  mReceiver = new ChatBroadCastReceiver（）; 
 LocalBroadcastManager.getInstance（getActivity（））。registerReceiver（mReceiver，new IntentFilter（chatupdater））; 
  
所以你只能在 ChatBroadCastReceiver 类。因为mReceiver是一个 ChatBroadCastReceiver 类的实例。
 
 
 
现在接收广播消息在您创建的匿名类上你的 ChatFragment 你需要注册下面的代码。其中mReceiver是您在 ChatFragment 类中实现的匿名BroadcastReceiver类的实例。
  LocalBroadcastManager.getInstance（getActivity（））。registerReceiver（mReceiver，new IntentFilter（chatupdater））
  
接收广播消息ChatFragment和ChatBroadCastReceiver都需要注册两次广播接收者。
  LocalBroadcastManager.getInstance（ getActivity（））。registerReceiver（mReceiver，new IntentFilter（chatupdater））
 
 ChatBroadCastReceiver mChatBroadCastReceiver = new ChatBroadCastReceiver（）; 
 LocalBroadcastManager.getInstance（getActivity（））。registerReceiver（mChatBroadCastReceiver，newIntentFilter（chatupdater））
  
希望这个答案能帮助你理解你的问题。
 
I am trying to make an chatting app.I have a SlidingDrawer Activity and it has many fragments and among which ChatFragment is one.Now when i am sending message to my friend , i have a Chatting Window and if any message comes from GCM service and i am in ChatFragment then this message will go to that Fragment and update the listview as i want to update the chatWindow when any message comes while chatting Now I tried to do like below.


GcmIntentService :
public class GcmIntentService extends IntentService {

    public GcmIntentService() {
        super("GcmIntentService");
    }

    @Override
    protected void onHandleIntent(Intent intent) {
        Bundle extras = intent.getExtras();
        GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
        // The getMessageType() intent parameter must be the intent you received
        // in your BroadcastReceiver.
        String messageType = gcm.getMessageType(intent);

        if (extras != null && !extras.isEmpty()) {  // has effect of unparcelling Bundle
            // Since we're not using two way messaging, this is all we really to check for
            if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)) {
                Logger.getLogger("GCM_RECEIVED").log(Level.INFO, extras.toString());

                showToast(extras.getString("message"));
                Intent sendData = new Intent("chatupdater");
                sendData.putExtra("msg", extras.getString("message"));
                LocalBroadcastManager.getInstance(this).sendBroadcast(sendData);
                Log.i("chat","i am in GCMIntentService");


            }
        }
        GcmBroadcastReceiver.completeWakefulIntent(intent);
    }
Here i am starting a broadcastreceiver in onHandleIntent().

ChatBroadCastReceiver:
public class ChatBroadCastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.i("chat","I am in ChatBroadCastReceiver");
        String msg = intent.getStringExtra("msg");
        Log.i("chat",msg);



        //Intent data = new Intent("chatupdater");
        //Intent data = new Intent("chatupdater");
        //data.putExtra("key","data");
        //data.putInt("fragmentno",1); // Pass the unique id of fragment we talked abt earlier
        //context.sendBroadcast(intent);


    }
}
This is my ChatBroadCastReceiver class and if any message comes it successfully receives at the onReceive() method.Now i want to send this message to the Fragment.What i tried , i registered the Fragment with it and tried to get the same data at the onReceive() of ChatFragment.But it didn't call.I tried to see by logging.
public class ChatFragment extends Fragment {

    //ChatBroadCastReceiver mReceiver;
    private EditText et_chat;
    Bundle mailData;
    String caller_mail;
    private ListView chatListview;
    private ChatWindowAdapter chatWindowAdapter;
    private List<ChatSession>PreviousChatSession;
    private List<ChatInfo> chatListItems;
    Button chat_send;
    public ChatFragment() {

    }

    public BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            Log.i("chat","I am in BroadCastReceiver");
            String msg = intent.getStringExtra("msg");
            Toast.makeText(getActivity(),msg,Toast.LENGTH_LONG).show();
        }
    };

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        mReceiver = new ChatBroadCastReceiver();
        //getActivity().registerReceiver(new ChatBroadCastReceiver(),new IntentFilter("chatupdater"));
        LocalBroadcastManager.getInstance(getActivity()).registerReceiver(new ChatBroadCastReceiver(),new IntentFilter("chatupdater"));
        Log.i("chat", "I am in onCreate");

    }
Now how can i get the message which i got in the Broadcastreceiver to the onReceive() of ChatFragment??
解决方案
To Register your Broadcast You are using:
mReceiver = new ChatBroadCastReceiver();
LocalBroadcastManager.getInstance(getActivity()).registerReceiver(mReceiver ,new IntentFilter("chatupdater"));
So you will Only receive Broadcast on ChatBroadCastReceiver class. Because mReceiver is a Instance of  ChatBroadCastReceiver class.

Now to Receive broadcast Message on anonymous class that you have created in your ChatFragment you need to register that like below code. Where mReceiver is a Instance of anonymous BroadcastReceiver class that you have implemented in your ChatFragment class.
LocalBroadcastManager.getInstance(getActivity()).registerReceiver(mReceiver ,new IntentFilter("chatupdater"))
To Receive Broadcast Message Both on ChatFragment and ChatBroadCastReceiver you need to register broadcast receiver twice.
LocalBroadcastManager.getInstance(getActivity()).registerReceiver(mReceiver ,new IntentFilter("chatupdater"))

ChatBroadCastReceiver mChatBroadCastReceiver = new ChatBroadCastReceiver();
LocalBroadcastManager.getInstance(getActivity()).registerReceiver(mChatBroadCastReceiver ,new IntentFilter("chatupdater"))
Hope this answer will help you to understand your problem.

                        
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