Firebase Java Server将推送通知发送到所有设备

Question

我正在尝试使用新的Firebase服务向我的Android设备发送推送通知.我注册并设置了一个应用程序,我还在android应用程序中放置了接收通知所需的所有代码.通过Firebase控制台,我可以向我的应用发送通知,并收到并显示.现在我想编写一个java独立服务器,向所有设备发送通知.这是我目前的代码:

final String apiKey = "I added my key here";
URL url = new URL("https://fcm.googleapis.com/fcm/send");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
conn.setRequestProperty("Authorization", "key=" + apiKey);

conn.setDoOutput(true);

String input = "{\"notification\" : {\"title\" : \"Test\"}, \"to\":\"test\"}";

OutputStream os = conn.getOutputStream();
os.write(input.getBytes());
os.flush();
os.close();

int responseCode = conn.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Post parameters : " + input);
System.out.println("Response Code : " + responseCode);

BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();

while ((inputLine = in.readLine()) != null) {
    response.append(inputLine);
}
in.close();

// print result
System.out.println(response.toString());

这是我从他们的服务器回来的结果:

{"multicast_id":6602141464107786356,"success":0,"failure":1,"canonical_ids":0,"results":[{"error":"InvalidRegistration"}]}

不幸的是,只是删除"to"标签不起作用,我得到一个返回的代码400.我读到我需要注册设备,将设备ID发送到服务器并将其保存在那里,然后遍历服务器上的所有已注册设备以发送消息.是不是有一种更简单的方法,只需向所有设备发送消息,就像在控制台中一样？

非常感谢您的帮助,因为我一直试图让这一天全天工作=(

问候,达斯汀

Answer 1

我不相信这是可能的.相反,我建议将所有设备注册到同一主题,然后您可以立即向所有设备发送消息.这是关于此的帮助文档:

从服务器发送主题消息

https://firebase.google.com/docs/cloud-messaging/topic-messaging

Answer 2

此解决方案使用Apache HttpClient将Push通知发送到Firebase:

HttpClient client = HttpClientBuilder.create().build();
HttpPost post = new HttpPost("https://fcm.googleapis.com/fcm/send");
post.setHeader("Content-type", "application/json");
post.setHeader("Authorization", "key=AIzaSyBSxxxxsXevRq0trDbA9mhnY_2jqMoeChA");

JSONObject message = new JSONObject();
message.put("to", "dBbB2BFT-VY:APA91bHrvgfXbZa-K5eg9vVdUkIsHbMxxxxxc8dBAvoH_3ZtaahVVeMXP7Bm0iera5s37ChHmAVh29P8aAVa8HF0I0goZKPYdGT6lNl4MXN0na7xbmvF25c4ZLl0JkCDm_saXb51Vrte");
message.put("priority", "high");

JSONObject notification = new JSONObject();
notification.put("title", "Java");
notification.put("body", "Notificação do Java");

message.put("notification", notification);

post.setEntity(new StringEntity(message.toString(), "UTF-8"));
HttpResponse response = client.execute(post);
System.out.println(response);
System.out.println(message);

Answer 3

使用以下代码将推送通知发送到多个设备:

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import com.google.android.gcm.server.Message;
import com.google.android.gcm.server.MulticastResult;
import com.google.android.gcm.server.Result;
import com.google.android.gcm.server.Sender;

public class PushNotifactionHelper {
public final static String AUTH_KEY_FCM = "your key ";
public final static String API_URL_FCM = "https://fcm.googleapis.com/fcm/send";

public static void sendPushNotification(List<String> deviceTokenList) {
    Sender sender = new Sender(AUTH_KEY_FCM);
    Message msg = new Message.Builder().addData("message", "Message body")
            .build();
    try {
        MulticastResult result = sender.send(msg, deviceTokenList, 5);
        for (Result r : result.getResults()) {
            if (r.getMessageId() != null) 
                System.out.println("Push Notification Sent Successfully");
             else 
                System.out.println("ErrorCode " + r.getErrorCodeName());
        }
    } catch (IOException e) {
        System.out.println("Error " + e.getLocalizedMessage());
    }
   }
  }   

注意:使用gcm.server.jar

Answer 4

你的JSON将是这样的:

      {
      "registration_ids": [
                        "fcm token 1",
                        "fcm token 2",
                        "fcm token 3"
                    ],
      "data": {
                "message": "msg"
              },
      "notification": {
                "title": "App name",
                "text": " your msg"
            }
    }

public void sendGroupPush(Context context, ArrayList tokenlist, String message) {
            String msg = message;
            String title = context.getString(R.string.app_name);
            JSONArray regId = null;
            JSONObject objData = null;
            JSONObject data = null;
            JSONObject notif = null;
            try {
                regId = new JSONArray();
                for (int i = 0; i < tokenlist.size(); i++) {
                    regId.put(tokenlist.get(i));
                }
                data = new JSONObject();
                data.put("message", message);
                notif = new JSONObject();
                notif.put("title", title);
                notif.put("text", msg);

                objData = new JSONObject();
                objData.put("registration_ids", regId);
                objData.put("data", data);
                objData.put("notification", notif);
                Log.e("!_@rj@_group_PASS:>", objData.toString());
            } catch (JSONException e) {
                e.printStackTrace();
            }

            JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.POST, Constants.FCM_PUSH_GROUP_URL, objData,
                    new Response.Listener<JSONObject>() {
                        @Override
                        public void onResponse(JSONObject response) {
                            Log.e("!_@rj@_@@_SUCESS", response + "");
                        }
                    },
                    new Response.ErrorListener() {
                        @Override
                        public void onErrorResponse(VolleyError error) {
                            Log.e("!_@rj@_@@_Errors--", error + "");
                        }
                    }) {
                @Override
                public Map<String, String> getHeaders() throws AuthFailureError {
                    Map<String, String> params = new HashMap<String, String>();
                    params.put("Authorization", "key=" + Constants.FCM_API_KEY);
                    params.put("Content-Type", "application/json");
                    Log.e("!_@rj@_@@PUSH_headrers", "::> " + params);
                    return params;
                }
            };
            RequestQueue requestQueue = Volley.newRequestQueue(context);
            int socketTimeout = 1000 * 60;// 60 seconds
            RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
            jsObjRequest.setRetryPolicy(policy);
            requestQueue.add(jsObjRequest);
        }

public static String FCM_PUSH_URL =" https://fcm.googleapis.com/fcm/send ";

Answer 5

在这里，我有一个非常简单的解决方案，用于发送推送消息组以及个人

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){


    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","Alankit");
infoJson.put("body", message);

JSONObject json = new JSONObject();
json.put("to",tokenId.trim());
json.put("notification", infoJson);

System.out.println("json :" +json.toString());
System.out.println("infoJson :" +infoJson.toString());
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()));
System.out.println("Android Notification Response : " + reader.readLine());
}else if(status == 401){
//client side error
System.out.println("Notification Response : TokenId : " + tokenId + " Error occurred :");
}else if(status == 501){
//server side error
System.out.println("Notification Response : [ errorCode=ServerError ] TokenId : " + tokenId);
}else if( status == 503){
//server side error
System.out.println("Notification Response : FCM Service is Unavailable  
TokenId : " + tokenId);
}
}
}catch(MalformedURLException mlfexception){
// Prototcal Error
System.out.println("Error occurred while sending push Notification!.." + mlfexception.getMessage());
}catch(Exception mlfexception){
//URL problem
System.out.println("Reading URL, Error occurred while sending push 
Notification!.." + mlfexception.getMessage());
}

}

 static void send_FCM_NotificationMulti(List<String> putIds2, String 
tokenId, 
 String server_key, String message){
    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

        JSONArray regId = null;
        JSONObject objData = null;
        JSONObject data = null;
        JSONObject notif = null;

            regId = new JSONArray();
            for (int i = 0; i < putIds2.size(); i++) {
                regId.put(putIds2.get(i));
            }
            data = new JSONObject();
            data.put("message", message);
            notif = new JSONObject();
            notif.put("title", "Alankit Universe");
            notif.put("text", message);

            objData = new JSONObject();
            objData.put("registration_ids", regId);
            objData.put("data", data);
            objData.put("notification", notif);
            System.out.println("!_@rj@_group_PASS:>"+ objData.toString());


    System.out.println("json :" +objData.toString());
    OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());

    wr.write(objData.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()));
    System.out.println("Android Notification Response : " + 
    reader.readLine());
    }else if(status == 401){
    //client side error
    System.out.println("Notification Response : TokenId : " + tokenId + " 
      Error occurred :");
    }else if(status == 501){
    //server side error
    System.out.println("Notification Response : [ errorCode=ServerError ] 
    TokenId : " + tokenId);
    }else if( status == 503){
    //server side error
    System.out.println("Notification Response : FCM Service is Unavailable  
   TokenId : " + tokenId);
    }
    }
    }catch(MalformedURLException mlfexception){
    // Prototcal Error
    System.out.println("Error occurred while sending push Notification!.." + 
   mlfexception.getMessage());
    }catch(IOException mlfexception){
    //URL problem
    System.out.println("Reading URL, Error occurred while sending push 
  Notification!.." + mlfexception.getMessage());
    }catch (Exception exception) {
    //General Error or exception.
    System.out.println("Error occurred while sending push Notification!.." + 
 exception.getMessage());
    }

    }

}

     Calling should be like that :



  public class TestFCM {
        static List<String> putIds;
        public static void main(String[] args) {

    //Just I am passed dummy information
    // DeviceID's

    String tokenId1 = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
    String tokenId  = "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy";
    String server_key ="<Server Key>" ;
    String message = "Welcome alankit Push Service.";

    putIds= new ArrayList<>();
    putIds.add(tokenId1);
    putIds.add(tokenId);

   /* for Group*/
    FCM.send_FCM_NotificationMulti(putIds,tokenId,server_key,message);  

    /*for indevidual*/
    FCM.send_FCM_Notification( tokenId,server_key,message);
    }


}