没有从BLE设备接收数据
我又来了。
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。
但是……我没有从我的设备接收数据！ 我能够获得特征和描述符，但……仅此而已。 我只是…… 错过了重点 。 这是我的代码：
private BluetoothLeService mBluetoothLeService; private ArrayList mGattCharacteristics = new ArrayList(); 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 gattCharacteristics = new ArrayList(); @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("ND"); 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 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; } 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()
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。 它是BluetoothGattCallback的一部分。
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。 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。
然后在您的回调中，您将在onConnectionStateChange(BluetoothGatt gatt, int status, int newState)收到连接状态。 如果状态为BluetoothProfile.STATE_CONNECTED您可以使用gatt.discoverServices()发现服务。 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。
然后，您将使用gatt.readCharacteristic( service.getCharacteristic(CHARACTERISTIC_UUID))读取该特征。 然后，这会触发onCharacteristicRead(BluetoothGatt gatt, final BluetoothGattCharacteristic characteristic, int status)回调。 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。
由于异步操作链，它可能会令人困惑。 但是，这里的服务器和客户端都有很好的示例代码，更具体地说，客户端代码在此文件中 。 它们与NewCircle 关于Android上BLE的优秀video有关 ，它也解释了一些代码。
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。 最好还是看看NewCirclevideo和示例项目……