Android 蓝牙开发

Android蓝牙开发可以通过Android Bluetooth API来实现。使用Bluetooth API，Android应用可以执行以下操作：

1. 检查设备是否支持蓝牙功能：

BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (bluetoothAdapter == null) {
    // 设备不支持蓝牙
}

2. 打开蓝牙：

if (!bluetoothAdapter.isEnabled()) {
    Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
    startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}

3. 搜索蓝牙设备：

bluetoothAdapter.startDiscovery();

4. 监听蓝牙设备的发现：

BroadcastReceiver receiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            // 处理发现的蓝牙设备
        }
    }
};
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(receiver, filter);

5. 连接到蓝牙设备：

BluetoothDevice device = bluetoothAdapter.getRemoteDevice(address);
BluetoothSocket socket = device.createRfcommSocketToServiceRecord(MY_UUID);
socket.connect();

6. 通过蓝牙发送和接收数据：

OutputStream outputStream = socket.getOutputStream();
outputStream.write(data);
InputStream inputStream = socket.getInputStream();
byte[] buffer = new byte[1024];
int bytesRead = inputStream.read(buffer);

请注意，上述代码仅为示例，实际开发中可能需要处理异常、权限请求等。