我正在尝试在 Sony SmartWatch 3 上实现 BluetoothGattServer。
我可以成功地打开 Gatt 服务器以及做广告。
使用BLE Scanner 应用程序,在发现我的自定义服务及其自定义特征时,我得到了不一致的结果。
- 在三星 Galaxy Note 8 - Android 4.4 - 我可以正确检测到自定义服务和自定义特征;
- 在 Nexus 7 - Android 5.0.1 - 我可以检测到我的自定义服务,但只有一个带有奇怪 UUID 的特征:00000000-0000-1000-8000-00805f9b34fb
- 在三星 Galaxy Note 8 上 - CynaogenMod Marshmallow - 与 Nexus 7 相同。
这是我在 Wear 设备上运行的代码:
public final class BluetoothServer extends BluetoothGattServerCallback{
private final static String TAG = BluetoothServer.class.getSimpleName();
private final static String BASE_UUID = "0000%s-0000-1000-8000-00805f9b34fb";
public final static UUID MAIN_SERVICE = UUID.fromString(String.format(BASE_UUID, "FEE0"));
public final static UUID CHARAC_REQUEST = UUID.fromString(String.format(BASE_UUID, "FEE01"));
public final static UUID CHARAC_RECORDING = UUID.fromString(String.format(BASE_UUID, "FEE02"));
private final BluetoothGattServer gattServer;
private final BluetoothGattService mainServer;
private final BluetoothGattCharacteristic requestCharacteristic;
private final BluetoothGattCharacteristic recordingCharacteristic;
public BluetoothServer(@NonNull final Context context) {
final BluetoothManager btManager = (BluetoothManager) context.getSystemService(Context.BLUETOOTH_SERVICE);
final BluetoothAdapter btAdapter = btManager.getAdapter();
this.gattServer = btManager.openGattServer(context.getApplicationContext(), this);
this.mainService= new BluetoothGattService(MAIN_SERVICE, BluetoothGattService.SERVICE_TYPE_PRIMARY);
this.requestCharacteristic = new BluetoothGattCharacteristic(CHARAC_REQUEST, BluetoothGattCharacteristic.PROPERTY_READ, BluetoothGattCharacteristic.PERMISSION_READ);
this.recordingCharacteristic = new BluetoothGattCharacteristic(CHARAC_RECORDING, BluetoothGattCharacteristic.PROPERTY_READ, BluetoothGattCharacteristic.PERMISSION_READ);
this.mainService.addCharacteristic(this.requestCharacteristic);
this.mainService.addCharacteristic(this.recordingCharacteristic);
this.gattServer.addService(this.mainService);
final BluetoothLeAdvertiser advertiser = btAdapter.getBluetoothLeAdvertiser();
btAdapter.setName("Test Wear");
final AdvertiseSettings settings = new AdvertiseSettings.Builder()
.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY)
.setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
.setConnectable(false)
.build();
final ParcelUuid pUuid = new ParcelUuid(MAIN_SERVICE);
final AdvertiseData data = new AdvertiseData.Builder()
.setIncludeDeviceName(true)
.addServiceUuid(pUuid)
.build();
final AdvertiseCallback advertisingCallback = new AdvertiseCallback() {
@Override
public final void onStartSuccess(final AdvertiseSettings settingsInEffect) {
super.onStartSuccess(settingsInEffect);
Log.i(TAG, "Started advertisement with success");
}
@Override
public final void onStartFailure(final int errorCode) {
Log.e(TAG, "Advertising onStartFailure: " + errorCode );
super.onStartFailure(errorCode);
}
};
advertiser.startAdvertising(settings, data, advertisingCallback );
}
//[... the rest of the callbacks implementation ...]
}
我还尝试使用来自https://www.uuidgenerator.net/的自定义生成的 UUID,但这样做更糟糕:要么我不能在包含名称的情况下做广告,要么如果我不包含名称,那么 BLE Scanner 应用程序将无法拾取我在所有设备上的定制服务。
我究竟做错了什么 ?