蓝牙

最新推荐文章于 2024-09-21 15:21:07 发布

hjh_devils

最新推荐文章于 2024-09-21 15:21:07 发布

阅读量253

点赞数

分类专栏： Android 第二月

本文链接：https://blog.youkuaiyun.com/weixin_44965867/article/details/100547314

版权

Android 第二月专栏收录该内容

6 篇文章

订阅专栏

本文深入解析蓝牙技术，涵盖蓝牙权限配置、设备搜索、已配对设备显示及数据传输过程。通过代码示例，详细介绍了如何在Android系统中实现蓝牙功能，包括开启、关闭蓝牙，搜索附近蓝牙设备，以及蓝牙设备间的数据传输。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

蓝牙技术

是一种无线技术标准，可实现固定设备、移动设备和楼宇个人域网之间的短距离数据交换，我们主要掌握这几项技能：

权限

   <!-- 用于进行网络定位 -->
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <!-- 用于访问GPS定位 -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH"/>

        bluetoothManager=(BluetoothManager) getSystemService(BLUETOOTH_SERVICE);
        adapter= bluetoothManager.getAdapter()

打开

  Intent intent = new Intent();
                intent.setAction(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                intent.getSerializableExtra(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
                intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,120);
                startActivityForResult(intent,100);

关闭

 adapter.disable();

搜索附近蓝牙设备

要用广播

//广播
class MyRecevier extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {
        if(intent.getAction().equals(BluetoothDevice.ACTION_FOUND)){
            BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            scanlist.add(device);
            scanadpater.notifyDataSetChanged();
        }
    }
}
//绑定广播
  IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
        myRecevier= new MyRecevier();
        registerReceiver(myRecevier,intentFilter);
        
             adapter.startDiscovery();
```
# 显示已经配对的设备
```@
  bondelist.clear();
                Set<BluetoothDevice> bondedDevices = adapter.getBondedDevices();
                for (BluetoothDevice bondedDevice : bondedDevices) {
                    bondelist.add(bondedDevice);
                }
                bondeadpater.notifyDataSetChanged();
```
# 连接加传递数据
服务端 接受消息
```@
public class BlueToothReceiveThread extends Thread{
    private BluetoothSocket serverSocket;
    private Handler handler;

    public BlueToothReceiveThread(BluetoothSocket serverSocket, Handler handler) {
        this.serverSocket = serverSocket;
        this.handler = handler;
    }

    @Override
    public void run() {
        super.run();
        try {
            InputStream inputStream = serverSocket.getInputStream();
            byte[] bytes = new byte[1024];
            int read = inputStream.read(bytes);
            String s = new String(bytes, 0, read);
            Message message = Message.obtain();
            message.what=102;
            message.obj=s;
            handler.sendMessage(message);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

```
客户端 (本机) 发送消息
```@
public class BlueToothSendThread extends Thread{
    private static final String TAG = "BlueToothSendThread";
    private BluetoothSocket socket;
    private String message;

    public BlueToothSendThread(BluetoothSocket socket, String message) {
        this.socket = socket;
        this.message = message;
    }

    @Override
    public void run() {
        super.run();
        try {
            socket.connect();
            if(socket.isConnected()){
                OutputStream outputStream = socket.getOutputStream();
                outputStream.write(message.getBytes());
                Log.i(TAG, "run: "+"发送成功");
            }else {
                Log.i(TAG, "run: "+"连接失败");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

```