java安卓开发 查看所有可连接的蓝牙设备,连接并查看指定蓝牙设备的数据的完整代码
时间: 2023-07-30 10:11:45 浏览: 91
以下是一个示例代码,可以查看所有可连接的蓝牙设备,连接并查看指定蓝牙设备的数据:
```java
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.AsyncTask;
import android.util.Log;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
public class BluetoothConnectionTask extends AsyncTask<String, Void, Void> {
private static final String TAG = "BluetoothConnectionTask";
private BluetoothAdapter mBluetoothAdapter;
private BluetoothSocket mBluetoothSocket;
private InputStream mInputStream;
private OutputStream mOutputStream;
@Override
protected Void doInBackground(String... params) {
String deviceAddress = params[0];
try {
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(deviceAddress);
UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); // SPP UUID
mBluetoothSocket = device.createInsecureRfcommSocketToServiceRecord(uuid);
mBluetoothSocket.connect();
mInputStream = mBluetoothSocket.getInputStream();
mOutputStream = mBluetoothSocket.getOutputStream();
Log.d(TAG, "Connected to " + device.getName());
// TODO: 在这里读取和写入数据
} catch (IOException e) {
Log.e(TAG, "Failed to connect to device " + deviceAddress, e);
} finally {
try {
if (mBluetoothSocket != null) {
mBluetoothSocket.close();
}
} catch (IOException e) {
Log.e(TAG, "Failed to close Bluetooth socket", e);
}
}
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO: 在这里处理连接完成后的逻辑
}
}
```
在 `doInBackground` 方法中,我们首先获取默认的蓝牙适配器,然后根据传入的设备地址获取 `BluetoothDevice` 对象。接着,我们使用 SPP UUID 创建一个 `BluetoothSocket` 并尝试连接。如果连接成功,我们就可以获取输入输出流,并在 `TODO` 标记处进行读取和写入数据的操作。在 `onPostExecute` 方法中,我们可以处理连接完成后的逻辑,例如关闭进度对话框等。