Question

我正在使用Firebase通知构建应用程序，我需要将通知发送到多个设备，我需要知道有什么方法可以在每个设备上设置间隔。

Answer 1

您可以使用此方法将通知发送到多个设备，首先需要在Firebase中创建项目，然后您将获得一个身份验证密钥，并在下面显示的代码中使用它

    import java.io.OutputStreamWriter;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.util.List;
    import org.json.JSONObject;
    import org.springframework.stereotype.Service;
    import org.springframework.transaction.annotation.Transactional;


     public void SendToMultipalToken(List allTokens , String message , String type) 
     throws Exception 
     {
                //Firebase Server Key       
                String authKey = "**Your firebase Auth key**";

                //Firebase URL
                String FMCurl = "https://fcm.googleapis.com/fcm/send";

                URL url = new URL(FMCurl);
                HttpURLConnection conn = (HttpURLConnection) 
        url.openConnection();//createb connection with firebase
                conn.setUseCaches(false);
                conn.setDoInput(true);
                conn.setDoOutput(true);

                //sending parameters of json object
                conn.setRequestMethod("POST");
                conn.setRequestProperty("Content-Type", "application/json");
                conn.setRequestProperty("Authorization", "key=" + authKey);

                JSONObject json = new JSONObject();

                //Convert List into String Arry
                String[] s=new String[allTokens.size()];

                for (int i = 0; i < allTokens.size(); i++) {
                    s[i]=(String) allTokens.get(i);
                }

                json.put("registration_ids", s);//for multiple device

                //json.put("to", "");//for single device

                json.put("collapse_key", "type_a");

                JSONObject info = new JSONObject();
                info.put("title", "Notification"); // Notification title
                info.put("body", "**notification body title**"); // Notification body
                json.put("notification", info);

                JSONObject jdata = new JSONObject();
                jdata.put("body", "**notification body title**");
                jdata.put("title", "Notification");
                jdata.put("key_1", message);
                jdata.put("key_2", type);

                json.put("data", jdata);

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

用于向多个设备发送通知的Firebase通知发送间隔

1 个答案: