Android BLE写入响应

BluetoothDevice device = bluetoothAdapter.getRemoteDevice(deviceAddress);
BluetoothGatt gatt = device.connectGatt(context, false, gattCallback);

private final BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
    @Override
    public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
        if (newState == BluetoothProfile.STATE_CONNECTED) {
            gatt.discoverServices();
        }
    }

    @Override
    public void onServicesDiscovered(BluetoothGatt gatt, int status) {
        // 服务发现成功，可以获取服务和特征
        BluetoothService service = gatt.getService(serviceUUID);
        BluetoothCharacteristic characteristic = service.getCharacteristic(characteristicUUID);
    }
};

byte[] data = new byte[]{0x01, 0x02, 0x03}; // 示例数据
characteristic.setValue(data);
gatt.writeCharacteristic(characteristic);

private final BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
    @Override
    public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothCharacteristic characteristic, int status) {
        if (status == BluetoothGatt.GATT_SUCCESS) {
            // 写入成功
            Log.d(TAG, "Write successful");
        } else {
            // 写入失败
            Log.e(TAG, "Write failed with status: " + status);
        }
    }
};

public class BleActivity extends AppCompatActivity {
    private BluetoothAdapter bluetoothAdapter;
    private BluetoothGatt gatt;
    private static final String TAG = "BleActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ble);

        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (bluetoothAdapter == null || !bluetoothAdapter.isEnabled()) {
            // 处理蓝牙不可用或未启用的情况
            return;
        }

        String deviceAddress = "YOUR_DEVICE_ADDRESS";
        BluetoothDevice device = bluetoothAdapter.getRemoteDevice(deviceAddress);
        gatt = device.connectGatt(this, false, gattCallback);
    }

    private final BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
        @Override
        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
            if (newState == BluetoothProfile.STATE_CONNECTED) {
                gatt.discoverServices();
            }
        }

        @Override
        public void onServicesDiscovered(BluetoothGatt gatt, int status) {
            BluetoothService service = gatt.getService(serviceUUID);
            BluetoothCharacteristic characteristic = service.getCharacteristic(characteristicUUID);
            byte[] data = new byte[]{0x01, 0.02, 0x03}; // 示例数据
            characteristic.setValue(data);
            gatt.writeCharacteristic(characteristic);
        }

        @Override
        public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothCharacteristic characteristic, int status) {
            if (status == BluetoothGatt.GATT_SUCCESS) {
                Log.d(TAG, "Write successful");
            } else {
                Log.e(TAG, "Write failed with status: " + status);
            }
        }
    };
}