GCM无法读取Android客户端

Question

主题的消息我有两款Android应用，我需要让他们通过Internet进行通信。所以我选择了Google GCM。

我想要一个应用程序创建一个主题，以便其他应用程序可以发布消息到该主题。我的目标是让这两个应用程序在它们之间交换文本数据。

我怎样才能让他们直接沟通？我在JsonObject的“to”字段中放置了什么？或者我应该使用“registration_id”字段并放置令牌ID？

或者我需要一个Web服务器？

我张贴代码给你看我所。

if (sharedPreferences.getBoolean(context.getString(R.string.Google_Services), false)) { 
     //Upstream msg 
     new AsyncTask() { 
      @Override 
      protected Void doInBackground(Object[] params) { 
       try { 
// Prepare JSON containing the GCM message content. What to send and where to send. 
        JSONObject jGcmData = new JSONObject(); 
        JSONObject jData = new JSONObject(); 
        jData.put("message", msgSend); 
        // Where to send GCM message 
        jGcmData.put("to", "/topics/phone"); 
        //jGcmData.put("to","cPnatWR_2yo:APA91bFshaomZuuxEggU2rn1s_YSDoyH4zUOeOImfFXsm62dwUj2kMjbxLCWvgwKEedQlk59TxnpQoTqUjgMiDcsUJil3kZ702lk-NHSIraYM9nQ_mkf3g98gWjmusq0wNpk5o4gos8_"); 
        //jGcmData.put("registration_ids","cPnatWR_2yo:APA91bFshaomZuuxEggU2rn1s_YSDoyH4zUOeOImfFXsm62dwUj2kMjbxLCWvgwKEedQlk59TxnpQoTqUjgMiDcsUJil3kZ702lk-NHSIraYM9nQ_mkf3g98gWjmusq0wNpk5o4gos8_"); 
        // What to send in GCM message. 
        jGcmData.put("data", jData); 

        // Create connection to send GCM Message request. 
        URL url = new URL("https://android.googleapis.com/gcm/send"); 
        HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
        conn.setRequestProperty("Authorization", "key=" + API_KEY); 
        conn.setRequestProperty("Content-Type", "application/json"); 
        conn.setRequestMethod("POST"); 
        conn.setDoOutput(true); 


        // Send GCM message content. 
        OutputStream outputStream = conn.getOutputStream(); 
        outputStream.write(jGcmData.toString().getBytes()); 

        // Read GCM response. 
        InputStream inputStream = conn.getInputStream(); 
        String resp = IOUtils.toString(inputStream); 
        System.out.println(resp); 
        System.out.println("Check your device/emulator for notification or logcat for " + 
          "confirmation of the receipt of the GCM message."); 
       } catch (IOException e) { 
        System.out.println("Unable to send GCM message."); 
        System.out.println("Please ensure that API_KEY has been replaced by the server " + 
          "API key, and that the device's registration token is correct (if specified)."); 
        e.printStackTrace(); 
       } catch (JSONException e) { 
        e.printStackTrace(); 
       } 
       return null; 

然后另一个应用程序注册到这个主题。

public class RegistrationIntentService extends IntentService { 

private static final String TAG = "RegIntentService"; 
private static final String[] TOPICS = {"phone"}; 

public RegistrationIntentService() { 
    super(TAG); 
} 

@Override 
protected void onHandleIntent(Intent intent) { 
    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this); 

    try { 
     // [START register_for_gcm] 
     // Initially this call goes out to the network to retrieve the token, subsequent calls 
     // are local. 
     // R.string.gcm_defaultSenderId (the Sender ID) is typically derived from google-services.json. 
     // See https://developers.google.com/cloud-messaging/android/start for details on this file. 
     // [START get_token] 
     InstanceID instanceID = InstanceID.getInstance(this); 
     instanceID.deleteInstanceID(); 
     String newIID = InstanceID.getInstance(this).getId(); 
     String token = instanceID.getToken(getString(R.string.gcm_defaultSenderId),GoogleCloudMessaging.INSTANCE_ID_SCOPE, null); 
     // [END get_token] 
     Log.i(TAG, "GCM Registration Token: " + token); 

     // TODO: Implement this method to send any registration to your app's servers. 
     sendRegistrationToServer(token); 

     // Subscribe to topic channels 
     subscribeTopics(token); 

     // You should store a boolean that indicates whether the generated token has been 
     // sent to your server. If the boolean is false, send the token to your server, 
     // otherwise your server should have already received the token. 
     sharedPreferences.edit().putBoolean(getString(R.string.SENT_TOKEN_TO_SERVER), true).apply(); 
     // [END register_for_gcm] 
    } catch (Exception e) { 
     Log.d(TAG, "Failed to complete token refresh", e); 
     // If an exception happens while fetching the new token or updating our registration data 
     // on a third-party server, this ensures that we'll attempt the update at a later time. 
     sharedPreferences.edit().putBoolean(getString(R.string.SENT_TOKEN_TO_SERVER), false).apply(); 
    } 
    // Notify UI that registration has completed, so the progress indicator can be hidden. 
    Intent registrationComplete = new Intent(getString(R.string.REGISTRATION_COMPLETE)); 
    LocalBroadcastManager.getInstance(this).sendBroadcast(registrationComplete); 
} 

/** 
* Persist registration to third-party servers. 
* 
* Modify this method to associate the user's GCM registration token with any server-side account 
* maintained by your application. 
* 
* @param token The new token. 
*/ 
private void sendRegistrationToServer(String token) { 
    // Add custom implementation, as needed. 
} 

/** 
* Subscribe to any GCM topics of interest, as defined by the TOPICS constant. 
* 
* @param token GCM token 
* @throws IOException if unable to reach the GCM PubSub service 
*/ 
// [START subscribe_topics] 
private void subscribeTopics(String token) throws IOException { 
    GcmPubSub pubSub = GcmPubSub.getInstance(this); 
    for (String topic : TOPICS) { 
     //pubSub.unsubscribe(token,"/topics/" + topic); 
     pubSub.subscribe(token, "/topics/" + topic, null); 
    } 
} 
// [END subscribe_topics] 

我包括接收应用程序的清单文件的GCM部分：

<!-- [START gcm_receiver] --> 
    <receiver 
     android:name="com.google.android.gms.gcm.GcmReceiver" 
     android:exported="true" 
     android:permission="com.google.android.c2dm.permission.SEND" > 
     <intent-filter> 
      <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
      <action android:name="com.google.android.c2dm.intent.REGISTRATION" /> 
      <category android:name="org.suportec.lost" /> 
     </intent-filter> 
    </receiver> 
    <!-- [END gcm_receiver] --> 
    <!-- [START gcm_listener] --> 
    <service 
     android:name="org.suportec.lost.GoogleCMListener" 
     android:exported="false" > 
     <intent-filter> 
      <action android:name="com.google.android.c2dm.intent.RECEIVE" /> 
     </intent-filter> 
    </service> 
    <!-- [END gcm_listener] --> 
    <!-- [START instanceId_listener] --> 
    <service 
     android:name="org.suportec.lost.MyInstanceIDListenerService" 
     android:exported="false"> 
     <intent-filter> 
      <action android:name="com.google.android.gms.iid.InstanceID"/> 
     </intent-filter> 
    </service> 
    <!-- [END instanceId_listener] --> 
    <service 
     android:name="org.suportec.lost.RegistrationIntentService" 
     android:exported="false"> 
     <intent-filter> 
      <action android:name="com.google.android.gms.iid.InstanceID"/> 
     </intent-filter> 
    </service> 

我不能把它的工作。请帮帮我！ 谢谢！

Answer 1

我已经解决了这个问题！

这是GCM使用权限中的问题。他们配置了其他应用程序包。这是愚蠢的原因在奇巧，但在4和以前，不起作用。