Android 实现手机与蓝牙BLE HID设备的配对连接，解绑，断开连接的代码

以下是 Android 实现手机与蓝牙BLE HID设备的配对连接、解绑、断开连接的代码：

1. 配对连接

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

// 发现服务
gatt.discoverServices();

// 连接状态回调
private final BluetoothGattCallback gattCallback = new BluetoothGattCallback() {
    @Override
    public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
        super.onConnectionStateChange(gatt, status, 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
            gatt.close();
        }
    }

    @Override
    public void onServicesDiscovered(BluetoothGatt gatt, int status) {
        super.onServicesDiscovered(gatt, status);
        if (status == BluetoothGatt.GATT_SUCCESS) {
            // 发现服务成功
            BluetoothGattService service = gatt.getService(SERVICE_UUID);
            BluetoothGattCharacteristic characteristic = service.getCharacteristic(CHARACTERISTIC_UUID);
            // 读取特征值
            gatt.readCharacteristic(characteristic);
        }
    }

    @Override
    public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
        super.onCharacteristicRead(gatt, characteristic, status);
        if (status == BluetoothGatt.GATT_SUCCESS) {
            // 读取特征值成功
            byte[] value = characteristic.getValue();
            // 处理特征值
            handleCharacteristicValue(value);
        }
    }
};

2. 解绑

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

// 断开连接
gatt.disconnect();
// 关闭连接
gatt.close();

3. 断开连接

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

// 断开连接
gatt.disconnect();

需要注意的是，以上代码中的 `SERVICE_UUID` 和 `CHARACTERISTIC_UUID` 分别为 BLE HID 设备的服务 UUID 和特征值 UUID，具体值需要根据实际设备进行设置。同时，还需要在 AndroidManifest.xml 文件中添加以下权限：

<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>