如何从 Android 中的 FCM 数据消息中获取价值?

问题描述

我正在尝试在我的应用中实现 FCM 通知.我已阅读 FCM 数据消息类型即使在应用程序处于后台时也会收到通知，因此我尝试在 onMessageRecieved 方法中实现该通知，但收到如下意外响应:

I'm trying to implement FCM notification in my app. I have read FCM data message type will receive notification even when app is in background so am trying to implementing that in onMessageRecieved method am getting unexpected response like this:

{title =2, message={"Status":"UNASSIGNED","CompanyName":"gd","LastModifiedDateTime":"2017-04-25 18:59:41","IsPartRequired":false,"ProblemCategory":"CONFIGURATION","IsGeneralClaim":false,"RegistrationID":1057,"IncidentCode":"INS/2017/04/25-0010","StatusID":0,"CreatedDateTime":"2017-04-25 18:59:41","IsInstallationCall":false}}

不知道如何解析这个从标题和消息中获取单独的值让我发布我的 firebase 消息代码:

Don't know how to parse this get separate value from title and message let me post my firebase message code:

public class FireBaseMessage extends FirebaseMessagingService {
    private static final String TAG = "MyFirebaseMsgService";

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);
      Map<String,String> data = remoteMessage.getData();
        Log.d(TAG, "From: " + data.toString());
// 
}
}

在此日志消息中，我得到了这样的响应，如何从中获取价值是这样的尝试:

In this log message am getting response like that how to get value from that is try like:

int title=data.get("title"); 

获取空指针，因为它的格式无效.在我的服务器端，我试图发布这样的 json 格式:

getting null pointer as this is not in valid format. In my server side i have am trying to post json format like this:

{
   "to":"es_OToDkj00:APA91bFqxbVMAaXy5fPtDbNVAkIwyVrPCmfGci2otHZPvdRoXPv-oDdjgtLR92Nqe8w6f57nCVceLbc3_zBWsInG9g1Pfdp3LvsMKyuaiYps0L1y3tn0N0XbzGseEI6jyiqs1r-sT9lb",
   "data":{
      "message":{
         "RegistrationID":1057,
         "IncidentCode":"INS/2017/04/25-0010",
         "CompanyName":"ABM INFOTECH",
         "StatusID":5,
         "Status":"ASSIGNED",
         "CreatedDateTime":"2017-04-25T12:03:45",
         "LastModifiedDateTime":"2017-04-25T18:59:41",
         "ProblemCategory":"CONFIGURATION",
         "IsPartRequired":false,
         "IsInstallationCall":false,
         "IsGeneralClaim":false
      },
      "title ":"1"
   }

不知道我在哪里犯了错误.谁能帮我?提前致谢！

Don't know where I'm making a mistake. Can anyone help me? Thanks in advance!

推荐答案

To get Title: from message payload

To get the Title: from message payload

使用:

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {


    Log.d(TAG, "From: " + remoteMessage.getFrom());

    // Check if message contains a data payload.
    //In case when notification was send in "notification" parameter we need to check wheather data is null or not.
    if (remoteMessage.getData()!=null && remoteMessage.getData().size() > 0) {
        Log.d(TAG, "Message data payload: " + remoteMessage.getData());
        String title = remoteMessage.getData().get("title").toString();
    }


}

编辑

检查你的 remoteMessage 是否包含特定的键:

check if your remoteMessage contain the specific key:

if (remoteMessage.getData()!=null){
 for (Map.Entry<String, String> entry : remoteMessage.getData().entrySet()) {
    String key = entry.getKey();
    String value = entry.getValue();
    Log.d(TAG, "key, " + key + " value " + value);
}}

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