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没有从BLE设备接收数据

[英]Not receiving data from BLE device

 原文  2015-09-25 09:58:34  1   1    java/ android/ bluetooth-lowenergy/ android-bluetooth

问题描述

I'm here again. 我又来了。
So, long story short: in my app I'm trying to receive datas from my BLE device (tickr heart rate monitor: that ) with the help of Android Samples ( that ). 所以，长话短说：在我的应用程序中，我试图在Android样本（ 那个 ）的帮助下从我的BLE设备（tickr心率监视器： 那个 ）接收数据。
But... I'm not receiving datas from my device! 但是......我没有从我的设备接收数据！ I'm able to get the Characteristics and the Descriptor, but... nothing more. 我能够获得特征和描述符，但......仅此而已。 I simply.. miss the point . 我只是...... 错过了重点 。 Here's my code: 这是我的代码： 

private BluetoothLeService mBluetoothLeService;
private ArrayList<BluetoothGattCharacteristic> mGattCharacteristics =
        new ArrayList<BluetoothGattCharacteristic>();
private BluetoothGattCharacteristic mNotifyCharacteristic;
public static final String EXTRAS_DEVICE_NAME = "DEVICE_NAME";
public static final String EXTRAS_DEVICE_ADDRESS = "DEVICE_ADDRESS";
private static final int CONNECTED_ID = 1;
private String mDeviceName;
private String mDeviceAddress;
private boolean mConnected = false;
BluetoothGatt btGatt;
BluetoothGattCharacteristic btGattCharacteristic;
 private List<BluetoothGattCharacteristic> gattCharacteristics = new ArrayList<BluetoothGattCharacteristic>();
    @InjectView(R.id.hrate) public TextView hRate;
private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        final String action = intent.getAction();
        if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) {
            Log.i(TAG, "gatt connected");
            mConnected = true;
        } else if (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) {
            mConnected = false;
            Log.i(TAG, "gatt disconnected");
            hRate.setText("0");
        } else if (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) {
            Log.i(TAG, "service discovered");
            returnServices(mBluetoothLeService.getSupportedGattServices());
        } else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
            Log.i(TAG, "data available");
            displayHR(intent.getExtras().getString(BluetoothLeService.EXTRA_DATA));
        }
    }
};

private final ServiceConnection mServiceConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName componentName, IBinder service) {
        mBluetoothLeService = ((BluetoothLeService.LocalBinder) service).getService();
        if (!mBluetoothLeService.initialize()) {
            Log.e(TAG, "Unable to initialize Bluetooth");
            onDestroy();
        }
        // Automatically connects to the device upon successful start-up initialization.
        mBluetoothLeService.connect(mDeviceAddress);
        Log.i("", "i'm connected");
    }

    @Override
    public void onServiceDisconnected(ComponentName componentName) {
        mBluetoothLeService = null;
    }
};

@OnClick({R.id.button_start, R.id.button_pause, R.id.button_stop})
public void OnSession(View view) {

    switch (view.getId()) {

        case R.id.button_start:
            if(first) {
                first=false;
                onBLE();
            }
            else {
                startRun();
                if (mBluetoothLeService != null) {
                    getActivity().registerReceiver(mGattUpdateReceiver, makeGattUpdateIntentFilter());
                    final boolean result = mBluetoothLeService.connect(mDeviceAddress);
                    Log.d(TAG, "Connect request result=" + result);
                }
            }
            break;
}
public Dialog onBLE(){
    android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(getActivity());
    builder.setMessage("Vuoi utilizzare un device?")
            .setCancelable(false)
            .setPositiveButton("Sì", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    Intent intent = new Intent(getActivity(), BluetoothActivity.class);
                    startActivityForResult(new Intent(intent), CONNECTED_ID);
                    dialog.cancel();
                }
            })
            .setNegativeButton("No", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    hRate.setText("N.D.");
                    startRun();
                    dialog.cancel();
                }
            });
    android.app.AlertDialog ble = builder.create();
    ble.show();
    return null;
}

public void startRun(){
    timeAtStart = SystemClock.uptimeMillis();
    customHandler.postDelayed(updated, 0);
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CONNECTED_ID){
        if (resultCode == Activity.RESULT_OK) {
            mDeviceName = data.getExtras().getString(EXTRAS_DEVICE_NAME);
            mDeviceAddress = data.getExtras().getString(EXTRAS_DEVICE_ADDRESS);
            Log.i("", mDeviceAddress+" "+mDeviceName);
            connect();
            startRun();
        }

    }
}
public void connect(){
    Intent gattServiceIntent = new Intent(getActivity(), BluetoothLeService.class);
    getActivity().bindService(gattServiceIntent, mServiceConnection, getActivity().BIND_AUTO_CREATE);
}
public void displayHR(String arg){
    if(arg != null){
        hRate.setText(arg);
    }
}
private void returnServices(List<BluetoothGattService> gattServices) {
    if (gattServices == null) return;

    for (BluetoothGattService service : gattServices) {
        gattCharacteristics=service.getCharacteristics();
        for (BluetoothGattCharacteristic characteristic : service.getCharacteristics()) {
            if (characteristic.getUuid().toString().compareTo(SampleGattAttributes.HEART_RATE_MEASUREMENT) == 0)
                btGattCharacteristic = characteristic;

        }
    }
    if ((btGattCharacteristic.getProperties() | BluetoothGattCharacteristic.PROPERTY_READ) > 0) {
        if (mNotifyCharacteristic != null) {
            mBluetoothLeService.setCharacteristicNotification(mNotifyCharacteristic, false);
            mNotifyCharacteristic = null;
        }
        mBluetoothLeService.readCharacteristic(btGattCharacteristic);
    }

    if ((btGattCharacteristic.getProperties() | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) {
        mNotifyCharacteristic = btGattCharacteristic;
        mBluetoothLeService.setCharacteristicNotification(btGattCharacteristic, true);

    }
}

private static IntentFilter makeGattUpdateIntentFilter() {
    final IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(BluetoothLeService.ACTION_GATT_CONNECTED);
    intentFilter.addAction(BluetoothLeService.ACTION_GATT_DISCONNECTED);
    intentFilter.addAction(BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED);
    intentFilter.addAction(BluetoothLeService.ACTION_DATA_AVAILABLE);
    return intentFilter;
}

here's my logcat: 这是我的logcat： 

09-25 11:38:05.975  25709-25709/apheniti.prova D/BluetoothAdapter﹕ startLeScan(): null
09-25 11:38:06.092  25709-25709/apheniti.prova D/dalvikvm﹕ GC_FOR_ALLOC freed 235K, 3% free 9444K/9716K, paused 18ms, total 18ms
09-25 11:38:06.147  25709-25722/apheniti.prova D/BluetoothAdapter﹕ onClientRegistered() - status=0 clientIf=4
09-25 11:38:07.194  25709-25722/apheniti.prova D/BluetoothAdapter﹕ onScanResult() - Device=DA:E1:DD:95:BB:D4 RSSI=-61
09-25 11:38:07.842  25709-25709/apheniti.prova D/BluetoothAdapter﹕ stopLeScan()
09-25 11:38:07.921  25709-25709/apheniti.prova I/﹕ DA:E1:DD:95:BB:D4 TICKR
09-25 11:38:08.006  25709-25709/apheniti.prova D/BluetoothGatt﹕ connect() - device: DA:E1:DD:95:BB:D4, auto: false
09-25 11:38:08.006  25709-25709/apheniti.prova D/BluetoothGatt﹕ registerApp()
09-25 11:38:08.006  25709-25709/apheniti.prova D/BluetoothGatt﹕ registerApp() - UUID=e8dfe101-58d1-4c04-bc3b-f1983e19b468
09-25 11:38:08.014  25709-25723/apheniti.prova D/BluetoothGatt﹕ onClientRegistered() - status=0 clientIf=4
09-25 11:38:08.014  25709-25709/apheniti.prova D/BluetoothLeService﹕ Trying to create a new connection.
09-25 11:38:08.014  25709-25709/apheniti.prova I/﹕ i'm connected
09-25 11:38:08.483  25709-25723/apheniti.prova D/BluetoothGatt﹕ onClientConnectionState() - status=0 clientIf=4 device=DA:E1:DD:95:BB:D4
09-25 11:38:08.491  25709-25723/apheniti.prova I/BluetoothLeService﹕ Connected to GATT server.
09-25 11:38:08.491  25709-25723/apheniti.prova D/BluetoothGatt﹕ discoverServices() - device: DA:E1:DD:95:BB:D4
09-25 11:38:08.491  25709-25723/apheniti.prova I/BluetoothLeService﹕ Attempting to start service discovery:true
09-25 11:38:08.491  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetService() - Device=DA:E1:DD:95:BB:D4 UUID=00001800-0000-1000-8000-00805f9b34fb
09-25 11:38:08.499  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetService() - Device=DA:E1:DD:95:BB:D4 UUID=00001801-0000-1000-8000-00805f9b34fb
09-25 11:38:08.499  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetService() - Device=DA:E1:DD:95:BB:D4 UUID=0000180d-0000-1000-8000-00805f9b34fb
09-25 11:38:08.499  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetService() - Device=DA:E1:DD:95:BB:D4 UUID=0000180f-0000-1000-8000-00805f9b34fb
09-25 11:38:08.506  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetService() - Device=DA:E1:DD:95:BB:D4 UUID=0000180a-0000-1000-8000-00805f9b34fb
09-25 11:38:08.506  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetService() - Device=DA:E1:DD:95:BB:D4 UUID=a026ee01-0a7d-4ab3-97fa-f1500f9feb8b
09-25 11:38:08.506  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetService() - Device=DA:E1:DD:95:BB:D4 UUID=a026ee03-0a7d-4ab3-97fa-f1500f9feb8b
09-25 11:38:08.506  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a00-0000-1000-8000-00805f9b34fb
09-25 11:38:08.514  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a01-0000-1000-8000-00805f9b34fb
09-25 11:38:08.514  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a04-0000-1000-8000-00805f9b34fb
09-25 11:38:08.530  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a05-0000-1000-8000-00805f9b34fb
09-25 11:38:08.530  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a37-0000-1000-8000-00805f9b34fb
09-25 11:38:08.538  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a38-0000-1000-8000-00805f9b34fb
09-25 11:38:08.546  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a19-0000-1000-8000-00805f9b34fb
09-25 11:38:08.546  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a29-0000-1000-8000-00805f9b34fb
09-25 11:38:08.546  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a27-0000-1000-8000-00805f9b34fb
09-25 11:38:08.553  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=00002a26-0000-1000-8000-00805f9b34fb
09-25 11:38:08.561  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=a026e002-0a7d-4ab3-97fa-f1500f9feb8b
09-25 11:38:08.561  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=a026e004-0a7d-4ab3-97fa-f1500f9feb8b
09-25 11:38:08.561  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetCharacteristic() - Device=DA:E1:DD:95:BB:D4 UUID=a026e00a-0a7d-4ab3-97fa-f1500f9feb8b
09-25 11:38:08.569  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetDescriptor() - Device=DA:E1:DD:95:BB:D4 UUID=00002902-0000-1000-8000-00805f9b34fb
09-25 11:38:08.569  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetDescriptor() - Device=DA:E1:DD:95:BB:D4 UUID=00002902-0000-1000-8000-00805f9b34fb
09-25 11:38:08.577  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetDescriptor() - Device=DA:E1:DD:95:BB:D4 UUID=00002902-0000-1000-8000-00805f9b34fb
09-25 11:38:08.585  25709-25722/apheniti.prova D/BluetoothGatt﹕ onGetDescriptor() - Device=DA:E1:DD:95:BB:D4 UUID=00002902-0000-1000-8000-00805f9b34fb
09-25 11:38:08.585  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetDescriptor() - Device=DA:E1:DD:95:BB:D4 UUID=00002902-0000-1000-8000-00805f9b34fb
09-25 11:38:08.600  25709-25723/apheniti.prova D/BluetoothGatt﹕ onGetDescriptor() - Device=DA:E1:DD:95:BB:D4 UUID=00002902-0000-1000-8000-00805f9b34fb
09-25 11:38:08.600  25709-25722/apheniti.prova D/BluetoothGatt﹕ onSearchComplete() = Device=DA:E1:DD:95:BB:D4 Status=0
09-25 11:38:09.624  25709-25709/apheniti.prova D/dalvikvm﹕ GC_FOR_ALLOC freed 441K, 5% free 9514K/9992K, paused 26ms, total 27ms
09-25 11:38:11.944  25709-25709/apheniti.prova D/dalvikvm﹕ GC_FOR_ALLOC freed 485K, 6% free 9542K/10064K, paused 18ms, total 18ms
09-25 11:38:14.772  25709-25709/apheniti.prova D/dalvikvm﹕ GC_FOR_ALLOC freed 490K, 6% free 9566K/10092K, paused 18ms, total 19ms
09-25 11:38:15.991  25709-25709/apheniti.prova D/BluetoothAdapter﹕ stopLeScan()

1 个解决方案

解决方案1
 6 已采纳  2015-10-05 18:39:21

You have a mBluetoothLeService.readCharacteristic(btGattCharacteristic) call but no onCharacteristicRead(BluetoothGatt gatt, final BluetoothGattCharacteristic characteristic, int status) callback to receive the value. 您有一个mBluetoothLeService.readCharacteristic(btGattCharacteristic)调用但没有onCharacteristicRead(BluetoothGatt gatt, final BluetoothGattCharacteristic characteristic, int status)回调来接收该值。 It's part of a BluetoothGattCallback . 它是BluetoothGattCallback的一部分。

My understanding of the process is that first you find a BluetoothDevice one way or another -- probably by a BLE scan. 我对这个过程的理解是，首先你会发现一种BluetoothDevice - 可能是通过BLE扫描。 You identify it eg by its name (with device.getName() ) or by the advertising data and connect to it with device.connectGatt(context, false/true, gattCallback) . 您可以通过其名称（使用device.getName() ）或广告数据来识别它，并使用device.connectGatt(context, false/true, gattCallback)连接到它。

Then in your callback you receive the connection status in onConnectionStateChange(BluetoothGatt gatt, int status, int newState) . 然后在您的回调中，您将在onConnectionStateChange(BluetoothGatt gatt, int status, int newState)收到连接状态。 If the state is BluetoothProfile.STATE_CONNECTED you can discover the services with gatt.discoverServices() . 如果状态为BluetoothProfile.STATE_CONNECTED您可以使用gatt.discoverServices()发现服务。 This will trigger onServicesDiscovered(BluetoothGatt gatt, int status) where you'll get the available services by gatt.getServices() and identify the correct service by its UUID and get its characteristics by service.getCharacteristics() and again identify the correct characteristic by its UUID. 这将触发onServicesDiscovered(BluetoothGatt gatt, int status) ，您将通过gatt.getServices()获取可用服务，并通过其UUID识别正确的服务并通过service.getCharacteristics()获取其特征，并再次通过以下方式识别正确的特征：它的UUID。

You will then read the characteristic with gatt.readCharacteristic( service.getCharacteristic(CHARACTERISTIC_UUID)) . 然后，您将使用gatt.readCharacteristic( service.getCharacteristic(CHARACTERISTIC_UUID))读取该特征。 This then triggers the onCharacteristicRead(BluetoothGatt gatt, final BluetoothGattCharacteristic characteristic, int status) callback. 然后，这会触发onCharacteristicRead(BluetoothGatt gatt, final BluetoothGattCharacteristic characteristic, int status)回调。 Here you'll check which characteristic you received (as things are asynchonous) with characteristic.getUuid() and read its String value with characteristic.getStringValue(0) or Float value with getFloatValue(0) etc. depending on the data type. 在这里，您将使用characteristic.getUuid()检查您收到的特征（因为它是异步的），并使用characteristic.getStringValue(0)读取其String值或使用getFloatValue(0)等读取Float值，具体取决于数据类型。

It can be confusing because of the chain of asynchronous operations. 由于异步操作链，它可能会令人困惑。 However there's nice sample code for both the server and the client in here and more specifically the client code is in this file . 但是有服务器和客户端都不错的示例代码在这里 ，更具体的客户端代码是在这个文件中 。 They are related to this excellent video about BLE on Android by NewCircle which also explains the code a little bit. 它们与NewCircle 关于Android上BLE的优秀视频有关 ，它也解释了一些代码。

The Android sample you are referring to might be a bit confusing as it also involves Activity/Service interaction and isn't purely about Bluetooth LE. 您所指的Android示例可能有点令人困惑，因为它还涉及活动/服务交互，而不仅仅是关于蓝牙LE。 Better to have a look the NewCircle video and sample project perhaps... 最好还是看看NewCircle视频和示例项目......

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