FCM不会立即发送数据消息

Question

我是通过数据而不是通知发送通知的。数据的默认优先级是正常的。

当我使用admin.messaging().send()时，它甚至大部分时间都不发送。但是我不能调整admin.messaging().sendToDevice()的优先级，因为它只接受“数据”和“通知”。当我使用这个方法的时候，它根本不发送信息。我不知道send()为什么也不能工作，我想知道如何使消息具有高优先级。

测试电话:小米，中兴。

云函数代码，几乎从不发送：

 const payload = 
   {  
     "delay_while_idle": false,
      "android": 
          {
             "priority": "high",
              "ttl":0
          },
      data:
          {
           is_there_new_notification: "true"
          },
          token: token

      };

       return  admin.messaging().send(payload)
               .then((response) => {
               // Response is a message ID string.
               //console.log('Successfully sent message:', response);

                return response;
                }).catch((error) => {
               // console.log('Error sending message:', error);
                 return error;
               });

云函数代码2，不立即以打瞌睡模式发送，有时甚至在设备醒着时也不发送)

const payload =    {  
        data:
         {
            is_there_new_notification: "true"
         }

  };

  return  admin.messaging().sendToDevice(token, payload).then((response) => {
                                    // Response is a message ID string.
                                    //console.log('Successfully sent message:', response);

                                   return response;
                                    })
                                .catch((error) => {
                                  // console.log('Error sending message:', error);
                                   return error;
                                    });

编辑：

安卓服务代码：

@Override
        public void onMessageReceived(RemoteMessage remoteMessage)
            {
                super.onMessageReceived(remoteMessage);
                Log.d(TAG, "onMessageReceived: " + remoteMessage.getData());

                //This is just a string variable return "true" in string. it is being sent in order to notify there are notifications. We don't need its content.
                if(remoteMessage.getData().get(getString(R.string.notification_is_there_new_notification))!= null)
                    {
                        FirebaseMethods.checkAndShowIfThereAreNotifications(context);
                    }
            }

AndroidManifest:

 <service
            android:name=".FirebaseFCMService"
            android:exported="false">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>

相关资源：

https://firebase.google.com/docs/cloud-messaging/concept-options https://developer.android.com/training/monitoring-device-state/doze-standby.html

Answer 1

尝试通过代码发送通知，这对我来说很好。请参考下列代码：

FCM.java

public class FCM {

final static private String FCM_URL = "https://fcm.googleapis.com/fcm/send";

/**
 * 
 * 
 * 
 * Method to send push notification to Android FireBased Cloud messaging
 * Server.
 * 
 * 
 * 
 * @param tokenId
 *            Generated and provided from Android Client Developer
 * 
 * @param server_key
 *            Key which is Generated in FCM Server
 * 
 * @param message
 *            which contains actual information.
 * 
 * 
 * 
 */

static void send_FCM_Notification(String tokenId, String server_key, String message, String req) {

    try {

        // Create URL instance.

        URL url = new URL(FCM_URL);

        // create connection.

        HttpURLConnection conn;

        conn = (HttpURLConnection) url.openConnection();

        conn.setUseCaches(false);

        conn.setDoInput(true);

        conn.setDoOutput(true);

        // set method as POST or GET

        conn.setRequestMethod("POST");

        // pass FCM server key

        conn.setRequestProperty("Authorization", "key=" + server_key);

        // Specify Message Format

        conn.setRequestProperty("Content-Type", "application/json");

        // Create JSON Object & pass value

        JSONObject infoJson = new JSONObject();

        //infoJson.put("title", "Here is your notification.");

        infoJson.put("body", message);

        infoJson.put("msg", req);

        JSONObject json = new JSONObject();

        json.put("to", tokenId.trim());

        //json.put("notification", infoJson);

        json.put("data", infoJson);
        json.put("priority", "high");
        json.put("time_to_live",5);


        OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());

        wr.write(json.toString());

        wr.flush();

        int status = 0;

        if (null != conn) {

            status = conn.getResponseCode();

        }

        if (status != 0) {

            if (status == 200) {

                // SUCCESS message

                BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));

                Log.d("ResultData","Android Notification Response : " + reader.readLine());

            } else if (status == 401) {

                // client side error

                Log.d("ResultData","401 Notification Response : TokenId : " + tokenId + " Error occurred :");

            } else if (status == 501) {

                // server side error

                Log.d("ResultData","Notification Response : [ errorCode=ServerError ] TokenId : " + tokenId);

            } else if (status == 503) {

                // server side error

                Log.d("ResultData","Notification Response : FCM Service is Unavailable  TokenId : " + tokenId);

            }

        }

    } catch (MalformedURLException mlfexception) {

        // Prototcal Error

        Log.d("ResultData","Error occurred while sending push Notification!.." + mlfexception.getMessage());

    } catch (IOException mlfexception) {

        // URL problem

        Log.d("ResultData",
                "Reading URL, Error occurred while sending push Notification!.." + mlfexception.getMessage());

    } catch (JSONException jsonexception) {

        // Message format error

        Log.d("ResultData",
                "Message Format, Error occurred while sending push Notification!.." + jsonexception.getMessage());

    } catch (Exception exception) {

        // General Error or exception.

        Log.d("ResultData","Error occurred while sending push Notification!.." + exception.getMessage());

    }

}

TestActivity.java

public class TestActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.test_act);

    String tokenId;// your token ID
    String server_key; //you server key ;
    String message;// Your message

    FCM.send_FCM_Notification( tokenId,server_key,message,"Reply");
}
}