小编yoz*_*zzy的帖子

我在Android应用中实施了Firebase推送通知.我实现了两个服务来注册令牌,并在检测到时发出通知.当我的应用程序启动时它正在工作,但当我的应用程序关闭时,它无法正常工作.

public class FirebaseinstanceIdService extends FirebaseInstanceIdService {

    @Override
    public void onTokenRefresh() {
        String refreshedToken = FirebaseInstanceId.getInstance().getToken();
        Log.e("Firebase", refreshedToken);
        MainActivity.setFirebaseToken(refreshedToken);
    }

}

public class MyFirebaseMessageService extends FirebaseMessagingService {

    private static final String TAG = "MyFirebaseMsgService";

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        //Displaying data in log
        //It is optional
        Log.e(TAG, "From: " + remoteMessage.getFrom());
        Log.e(TAG, "Notification Message Body: " + remoteMessage.getData().get("title"));

        //Calling method to generate notification
        sendNotification(remoteMessage.getData());
    }

    //This method is only generating push notification
    //It is same as we did in …

我正在使用RxAndroidBle库来扫描设备，然后连接到一个特定的设备并读取4 GATT特征。

我可以通过以下代码读取一个特性（电池电量）：

scanSubscription = rxBleClient.scanBleDevices(
            new ScanSettings.Builder()
                    .build()
    )
            .observeOn(AndroidSchedulers.mainThread())
            .doOnNext(
                    scanResult -> {
                        if(scanResult.getBleDevice().getName() != null){
                            if(scanResult.getBleDevice().getName().equals("NODE 1")){
                                Log.e("BLE SCAN", "SUCCESS");
                                Log.e("BLE SCAN", scanResult.getBleDevice().getName());
                                Log.e("BLE SCAN", scanResult.getBleDevice().getMacAddress());
                                scanSubscription.unsubscribe();

                                RxBleDevice device = scanResult.getBleDevice();
                                subscription = device.establishConnection(false) // <-- autoConnect flag
                                        .flatMap(rxBleConnection -> rxBleConnection.readCharacteristic(UUID.fromString("00002a19-0000-1000-8000-00805f9b34fb")))
                                        .subscribe(
                                                characteristicValue -> {
                                                    Log.e("Characteristic", characteristicValue[0]+"");
                                                },
                                                throwable -> {
                                                    Log.e("Error", throwable.getMessage());
                                                }
                                        );
                            }
                        }
                    }
            )
            .subscribe();

我可以使用来阅读两个：

.flatMap(rxBleConnection -> Observable.combineLatest( // use the same connection and combine latest emissions
                rxBleConnection.readCharacteristic(aUUID),
                rxBleConnection.readCharacteristic(bUUID),
                Pair::new
        )) …