Error sending push notification with Firebase-messaging

Question

I’m using the below method that worked:

public void enviaNotificacaoDenuncia(String mensagem, String token) {
        Sender sender = new Sender(apiKey);
        Message message = new Message.Builder()
                .addData("message", mensagem)
                //.addData("denuncia", getGson().toJson(denuncia, DetalheDenuncia.class))
                .build();
        try {
            Result result = sender.send(message, token, 3);

            System.out.println(result.getCanonicalRegistrationId());
            System.out.println(result.getErrorCodeName());
            System.out.println(result.getMessageId());
            //System.out.println(denuncia.getTokenGCM().substring(0, 10));


        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        try {

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

now appears the error below:

com.google.android.gcm.server.InvalidRequestException: HTTP Status Code: 400(Error=DeprecatedEndpoint)
    at com.google.android.gcm.server.Sender.sendNoRetry(Sender.java:211)
    at com.google.android.gcm.server.Sender.send(Sender.java:125)
    at com.t2ti.cardapio.Cardapio.enviaNotificacaoDenuncia(Cardapio.java:398)
    at com.t2ti.cardapio.Cardapio.insereDetalheDenuncia(Cardapio.java:76)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:212)
    at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:121)
    at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)
    at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:114)
    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)
    at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:172)
    at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:146)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1527)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1484)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
ago 23, 2019 3:47:26 PM org.apache.catalina.core.StandardContext reload
INFORMAÇÕES: Reloading Context with name [/CardapioWebService] has started

Answer 1

Friend, Google Cloude Messaging (GCM) has been deprecated, in place google advises to use Cloud Messaging with Firebase.
See the documentation of GCM.
And how to use the Firebase Cloud Messaging.

Answer 2

I managed using the method below: Creditworthiness

public void sendToTokenFcm(String tkn, String corpo)  {
        try {

            URL url = new URL("https://fcm.googleapis.com/fcm/send");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setUseCaches(false);
            conn.setDoInput(true);
            conn.setDoOutput(true);

            conn.setRequestMethod("POST");
            conn.setRequestProperty("Authorization","key=sua key");
             conn.setRequestProperty("Content-Type", "application/json");

            JSONObject json = new JSONObject();

            json.put("to", tkn);


            JSONObject info = new JSONObject();
            info.put("title", "Secretaria do Meio Ambiente");   // Notification title
            info.put("body", corpo); // Notification body

            json.put("notification", info);

            OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
            wr.write(json.toString());
            wr.flush();
            conn.getInputStream();

        }
        catch (Exception e)
        {
            //Log.d("Error",""+e);
            e.printStackTrace();
        }


       // return null;
      }