regId在android中爲空gcm

Question

嗨，在下面的代碼中，我得到了顯示empty.but用戶名和密碼值的regId，完美地工作。但我不明白爲什麼該設備ID顯示爲空。

點擊註冊按鈕後，它顯示已註冊GCM。

類

public class MainActivity extends Activity { 
    // label to display gcm messages 
    TextView lblMessage; 

    // Asyntask 
    AsyncTask<Void, Void, Void> mRegisterTask; 

    // Alert dialog manager 
    AlertDialogManager alert = new AlertDialogManager(); 

    // Connection detector 
    ConnectionDetector cd; 

    public static String username; 
    public static String password; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     cd = new ConnectionDetector(getApplicationContext()); 

     // Check if Internet present 
     if (!cd.isConnectingToInternet()) { 
      // Internet Connection is not present 
      alert.showAlertDialog(MainActivity.this, 
        "Internet Connection Error", 
        "Please connect to working Internet connection", false); 
      // stop executing code by return 
      return; 
     } 

     // Getting name, email from intent 
     Intent i = getIntent(); 

     username = i.getStringExtra("username"); 
     password = i.getStringExtra("password");   

     // Make sure the device has the proper dependencies. 
     GCMRegistrar.checkDevice(this); 

     // Make sure the manifest was properly set - comment out this line 
     // while developing the app, then uncomment it when it's ready. 
     GCMRegistrar.checkManifest(this); 

     lblMessage = (TextView) findViewById(R.id.lblMessage); 

     registerReceiver(mHandleMessageReceiver, new IntentFilter(
       DISPLAY_MESSAGE_ACTION)); 

     // Get GCM registration id 
     final String regId = GCMRegistrar.getRegistrationId(this); 

     // Check if regid already presents 
     if (regId.equals("")) { 
      // Registration is not present, register now with GCM   
      GCMRegistrar.register(this, SENDER_ID); 
     } else { 
      // Device is already registered on GCM 
      if (GCMRegistrar.isRegisteredOnServer(this)) { 
       // Skips registration.    
       Toast.makeText(getApplicationContext(), "Already registered with GCM", Toast.LENGTH_LONG).show(); 
      } else { 
       // Try to register again, but not in the UI thread. 
       // It's also necessary to cancel the thread onDestroy(), 
       // hence the use of AsyncTask instead of a raw thread. 
       final Context context = this; 
       mRegisterTask = new AsyncTask<Void, Void, Void>() { 

        @Override 
        protected Void doInBackground(Void... params) { 
         // Register on our server 
         // On server creates a new user 
         ServerUtilities.register(context, username, password, regId); 
         return null; 
        } 

        @Override 
        protected void onPostExecute(Void result) { 
         mRegisterTask = null; 
        } 

       }; 
       mRegisterTask.execute(null, null, null); 
      } 
     } 
    }  

    /** 
    * Receiving push messages 
    * */ 
    private final BroadcastReceiver mHandleMessageReceiver = new BroadcastReceiver() { 
     @Override 
     public void onReceive(Context context, Intent intent) { 
      String newMessage = intent.getExtras().getString(EXTRA_MESSAGE); 
      // Waking up mobile if it is sleeping 
      WakeLocker.acquire(getApplicationContext()); 

      /** 
      * Take appropriate action on this message 
      * depending upon your app requirement 
      * For now i am just displaying it on the screen 
      * */ 

      // Showing received message 
      lblMessage.append(newMessage + "\n");   
      Toast.makeText(getApplicationContext(), "New Message: " + newMessage, Toast.LENGTH_LONG).show(); 

      // Releasing wake lock 
      WakeLocker.release(); 
     } 
    }; 

    @Override 
    protected void onDestroy() { 
     if (mRegisterTask != null) { 
      mRegisterTask.cancel(true); 
     } 
     try { 
      unregisterReceiver(mHandleMessageReceiver); 
      GCMRegistrar.onDestroy(this); 
     } catch (Exception e) { 
      Log.e("UnRegister Receiver Error", "> " + e.getMessage()); 
     } 
     super.onDestroy(); 
    } 

} 

logcat的

04-22 04:05:46.389: E/UnRegister Receiver Error(2355): > Receiver not registered: com.google.android.gcm.GCMBroadcastReceiver@4175aa98 

Answer 1

創建使用谷歌的控制檯使用相同的名稱作爲Eclipse應用程序的名稱的新項目幫助我解決這個問題。

Answer 2

試試這個...最前一頁檢查谷歌播放服務

if (checkPlayServices()) { 
     gcm = GoogleCloudMessaging.getInstance(this); 
     mRegistrationId = getRegistrationId(mContext); 

     if (mRegistrationId.isEmpty()) { 
      try { 
       registerInBackground(senderId); 
      } catch (Exception e) { 
       Toast.makeText(mContext, "Unsupported for this   device", Toast.LENGTH_SHORT).show(); 
      } 
     } else { 
      Log.d("TAG", mRegistrationId); 
         } 
    } else { 
     Log.i(TAG, "No valid Google Play Services found."); 
    } 

檢查谷歌播放服務

private boolean checkPlayServices() { 
    int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this); 
    if (resultCode != ConnectionResult.SUCCESS) { 
     if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) { 
      GooglePlayServicesUtil.getErrorDialog(resultCode, this, 
        PLAY_SERVICES_RESOLUTION_REQUEST).show(); 
     } else { 
      Log.i(TAG, "This device is not supported."); 
      Toast.makeText(mContext, "This device is not supported.", Toast.LENGTH_SHORT).show(); 
      finish(); 
     } 
     return false; 
    } 
    return true; 
} 

獲取RegistrationId在這裏

private String getRegistrationId(Context context) { 
    final SharedPreferences prefs = getGCMPreferences(context); 
    String registrationId = prefs.getString(PROPERTY_REG_ID, ""); 
    assert registrationId != null; 
    if (registrationId.isEmpty()) { 
     //Log.i(TAG, "Registration not found."); 
     return ""; 
    } 

    int registeredVersion = prefs.getInt(PROPERTY_APP_VERSION, Integer.MIN_VALUE); 
    int currentVersion = getAppVersion(context); 
    if (registeredVersion != currentVersion) { 
     Log.i(TAG, "App version changed."); 
     return ""; 
    } 
    return registrationId; 
} 

這裏是registerInBackground異步任務

private void registerInBackground(final String senderID) { 

    new AsyncTask<Void, Void, String>() { 

     @Override 
     protected String doInBackground(Void... voids) { 
      String msg = ""; 
      try { 
       if (gcm == null) { 
        gcm = GoogleCloudMessaging.getInstance(mContext); 
       } 
       try { 
        mRegistrationId = gcm.register(senderID); 
       } catch (UnsupportedOperationException e) { 
        Toast.makeText(mContext, "Unsupported", Toast.LENGTH_SHORT).show(); 
       } 
       msg = "Device registered, registration ID=" + mRegistrationId; 


      } catch (IOException ex) { 
       msg = "Error :" + ex.getMessage(); 
      } 
      return msg; 
     } 

     @Override 
     protected void onPostExecute(String s) { 
      Log.d(TAG, s); 
     } 

    }.execute(null, null, null); 

} 

這對我有用。希望它會幫助你。