android单片机与蓝牙模块通信实例代码

将Android单片机与蓝牙模块连接起来，可以实现通过蓝牙模块发送和接收数据，下面是一个实例代码。

首先，需要在Android设备上打开蓝牙，并扫描周围的蓝牙设备。

// 打开蓝牙
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (bluetoothAdapter == null) {
    Log.e("TAG", "该设备不支持蓝牙");
} else {
    if (!bluetoothAdapter.isEnabled()) {
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    }
}

// 扫描蓝牙设备
private void searchBluetooth() {
    mBluetoothAdapter.startDiscovery();
    
    // 注册广播接收器
    IntentFilter filter = new IntentFilter();
    filter.addAction(BluetoothDevice.ACTION_FOUND);
    filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    registerReceiver(mReceiver, filter);
}

// 广播接收器
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_FOUND.equals(action)) {
            // 获取蓝牙设备
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            if (device != null) {
                Log.d("TAG", "发现蓝牙设备：" + device.getName() + " " + device.getAddress());
            }
        } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
            mBluetoothAdapter.cancelDiscovery();
        }
    }
};

然后，在Android设备上选择要连接的蓝牙设备，并进行连接操作。

private void connectBluetooth() {
    BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(mDeviceAddress);
    mBluetoothSocket = device.createInsecureRfcommSocketToServiceRecord(MY_UUID);
    try {
        mBluetoothSocket.connect();
        Log.d("TAG", "连接成功");
    } catch (IOException e) {
        Log.e("TAG", "连接失败：" + e.getMessage());
    }
}

接下来，就可以开始进行数据的发送和接收操作了。

// 发送数据
private void sendBluetooth(String data) {
    if (mBluetoothSocket != null) {
        try {
            OutputStream outputStream = mBluetoothSocket.getOutputStream();
            outputStream.write(data.getBytes());
        } catch (IOException e) {
            Log.e("TAG", "发送失败：" + e.getMessage());
        }
    }
}

// 接收数据
private void receiveBluetooth() {
    if (mBluetoothSocket != null) {
        try {
            InputStream inputStream = mBluetoothSocket.getInputStream();
            byte[] buffer = new byte[1024];
            int len;
            StringBuilder sb = new StringBuilder();
            while ((len = inputStream.read(buffer)) != -1) {
                sb.append(new String(buffer, 0, len));
            }
            Log.d("TAG", "接收到数据：" + sb.toString());
        } catch (IOException e) {
            Log.e("TAG", "接收失败：" + e.getMessage());
        }
    }
}

以上就是一个Android单片机与蓝牙模块通信的实例代码。需要注意的是，在实际使用中，可能会存在多线程操作等问题，需要根据具体的情况进行调整。