android蓝牙app代码
时间: 2024-06-19 16:03:56 浏览: 12
Android蓝牙应用程序的代码包括以下几个方面:
1. 搜索和配对蓝牙设备:可以使用BluetoothAdapter类和BluetoothDevice类来搜索和配对设备,可以通过调用startDiscovery()方法开始搜索设备,使用createBond()方法进行配对。
2. 连接蓝牙设备:使用BluetoothSocket类创建一个蓝牙套接字来与远程设备进行通信,可以使用connect()方法连接到远程设备。
3. 传输数据:使用BluetoothSocket类的getOutputStream()和getInputStream()方法获取输出和输入流进行数据传输。
4. 监听蓝牙连接状态:使用BroadcastReceiver监听蓝牙连接状态变化,如ACTION_ACL_CONNECTED、ACTION_ACL_DISCONNECTED等。
以下是一个简单的Android蓝牙应用程序示例代码:
```
public class BluetoothActivity extends AppCompatActivity {
private BluetoothAdapter bluetoothAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bluetooth);
// 获取蓝牙适配器
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
}
// 搜索设备
public void searchDevice() {
if (bluetoothAdapter.isDiscovering()) {
bluetoothAdapter.cancelDiscovery();
}
bluetoothAdapter.startDiscovery();
}
// 配对设备
public void pairDevice(BluetoothDevice device) {
try {
Method method = device.getClass().getMethod("createBond", (Class[]) null);
method.invoke(device, (Object[]) null);
} catch (Exception e) {
e.printStackTrace();
}
}
// 连接设备
public void connectDevice(BluetoothDevice device) {
BluetoothSocket socket = null;
try {
socket = device.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));
socket.connect();
OutputStream outputStream = socket.getOutputStream();
InputStream inputStream = socket.getInputStream();
// 进行数据传输
} catch (IOException e) {
e.printStackTrace();
}
}
// 监听连接状态
private BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
// 设备已连接
} else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
// 设备已断开连接
}
}
};
@Override
protected void onResume() {
super.onResume();
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
filter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
registerReceiver(receiver, filter);
}
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(receiver);
}
}
```