java - 使用 FCM、SQL、java 将推送通知发送到多个设备

Question

我有一个工作服务，可以将推送通知发送到注册设备，并且运行良好，但我在向多个设备发送推送通知时遇到问题。我正在尝试使用循环，但没有帮助。我认为统计回复可能会给我结果。我猜可能是 boolean 表达式的问题。也许有人知道在这种情况下该怎么做。感谢您的回复和以下代码:

 @RequestMapping(value = "/sendtodeviceid", method = RequestMethod.GET, produces = "application/json")
    public ResponseEntity<String> send() throws JSONException, SQLException {
        try {
            System.out.println("\n" + "send massege to devicesid" + "\n" + "start to get ID" + "\n");

            ArrayList <String> deviceList = new ArrayList<>();
            Statement statement = jdbcService.getStatement();
            String selSql = String.format("SELECT deviceid FROM courier WHERE isActive = true");
            ResultSet rs = statement.executeQuery(selSql);
            //   check equals for more deviceid
            while (rs.next()) {
                String deviceid = rs.getString("deviceid");
                System.out.println("DEVAICE ID which true from sending message " + "\n" + deviceid + "\n");
                deviceList.add(deviceid);
                if (!deviceid.equals(deviceid)) {
                    String newdeviceid = deviceid;
                    deviceList.add(newdeviceid);
                }
            }
            System.out.println(deviceList + "\n");
//          find some solution for loop sending message to all device
            for (String iddevice: deviceList) {
                System.out.println("DEVICE ID: " + iddevice + "\n");
//          create jsonObject look like this
//           {
//              "data":
//                     {"address":"latitude420&longitude420",
//                      "click_action":".MessageOrder",
//                      "order":"#420"},
//              "to":
//                    "d2Hxxa6PNYw",
//                    "priority":"high"
//             },{}
                do {    
                    JSONObject body = new JSONObject();
                    body.put("to", iddevice);
                    body.put("priority", "high");

//                JSONObject notification = new JSONObject();
//                notification.put("title", "Wise delivery");
//                notification.put("body", "It is personal order!!!");
//                notification.put("icon", "main_logo_black");
//                notification.put("click_action", ".MessageOrder");

                    JSONObject data = new JSONObject();
                    data.put("order", "#421");
                    data.put("address", "latitude420&longitude421");
                    data.put("click_action", ".MessageOrder");
//              data.put("icon","main_logo_black");

//              body.put("notification", notification);
                    body.put("data", data);

                    HttpEntity<String> request = new HttpEntity<>(body.toString());
                    System.out.println("JSON file request" + request);

                    CompletableFuture<String> pushNotification = androidPushNotificationsService.send(request);
                    CompletableFuture.allOf(pushNotification).join();

                    try {
                        String firebaseResponse = pushNotification.get();

                        return new ResponseEntity<>(firebaseResponse, HttpStatus.OK);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    } catch (ExecutionException e) {
                        e.printStackTrace();
                    }
                } while (iddevice == null);

            }

        } catch (SQLException e) {
            System.out.println("don't selectSQL" + "\n" + "SELECT deviceid FROM courier ");
        }
        return new ResponseEntity<>("Push Notification ERROR!", HttpStatus.BAD_REQUEST);
    }

终端显示:

// start
send message to devicesid
start to get ID
// get device id from database
DEVAICE ID which true from sending message
d2Hxxa6PNYw:
DEVAICE ID which true from sending message
eb0s9KRXac8:
// create the ArrayList
[d2Hxxa6PNYw, eb0s9KRXac8]
// and at this step I have a problem
DEVICE ID: d2Hxxa6PNYw

JSON file request<{"data":{"address":"latitude420&longitude421",
"click_action":".MessageOrder",
"order":"#421"},
"to":"d2Hxxa6PNYw",
"priority":"high"},{}>
    // after this must be the next step in loop)

Answer 1

您可以为用户订阅特定主题，而不是使用循环。然后，您可以使用 Firebase 控制台或编写服务器端逻辑发送通知。

FirebaseMessaging.getInstance().subscribeToTopic("news")
    .addOnCompleteListener(new OnCompleteListener<Void>() {
        @Override
        public void onComplete(@NonNull Task<Void> task) {
            String msg = getString(R.string.msg_subscribed);
            if (!task.isSuccessful()) {
                msg = getString(R.string.msg_subscribe_failed);
            }
            Log.d(TAG, msg);
            Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
        }
    });