要解决BLE外设显示不正确的问题,需要进行以下步骤:
// 设置广播数据
AdvertiseSettings.Builder settingsBuilder = new AdvertiseSettings.Builder();
// 设置广播模式
settingsBuilder.setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_LOW_LATENCY);
// 设置设备名称
settingsBuilder.setLocalName("MyDevice");
// 设置服务UUID
ParcelUuid uuid = new ParcelUuid(UUID.fromString("0000110a-0000-1000-8000-00805f9b34fb"));
AdvertiseData.Builder dataBuilder = new AdvertiseData.Builder();
dataBuilder.setIncludeDeviceName(true);
dataBuilder.addServiceUuid(uuid);
// 开始广播
BluetoothLeAdvertiser advertiser = bluetoothAdapter.getBluetoothLeAdvertiser();
advertiser.startAdvertising(settingsBuilder.build(), dataBuilder.build(), advertiseCallback);
BluetoothGattCharacteristic characteristic = new BluetoothGattCharacteristic(
UUID.fromString("00002a37-0000-1000-8000-00805f9b34fb"),
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_WRITE,
BluetoothGattCharacteristic.PERMISSION_READ | BluetoothGattCharacteristic.PERMISSION_WRITE
);
// 建立连接
BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
if (newState == BluetoothProfile.STATE_CONNECTED) {
// 连接成功,发现服务
gatt.discoverServices();
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
// 连接断开
}
}
@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
// 发现服务成功,获取特征值
BluetoothGattService service = gatt.getService(uuid);
BluetoothGattCharacteristic characteristic = service.getCharacteristic(uuid);
// 读取特征值
gatt.readCharacteristic(characteristic);
}
}
@Override
public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
// 读取特征值成功,处理数据
byte[] data = characteristic.getValue();
// 处理数据
}
}
@Override
public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
if (status == BluetoothGatt.GATT_SUCCESS) {
// 写入特征值成功
}
}
};
BluetoothDevice device = bluetoothAdapter.getRemoteDevice(deviceAddress);
BluetoothGatt gatt = device.connectGatt(context, false, gattCallback);
通过检查广播数据、特征值和连接逻辑,可以解决BLE外设显示不正确的问题。