OutputStream os = mBluetoothSocket.getOutputStream();
时间: 2024-03-24 15:23:02 浏览: 9
这段代码是用来获取蓝牙连接的输出流,可以通过该输出流向连接的蓝牙设备发送数据。
具体来说,mBluetoothSocket是一个已经建立好的蓝牙连接,通过调用它的getOutputStream()方法可以得到一个OutputStream对象,然后就可以调用OutputStream的write()方法向蓝牙设备发送数据了。
相关问题
import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothSocket; import android.os.Handler; import android.os.Message; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.UUID; public class bluetoothController { private BluetoothAdapter mBluetoothAdapter; private BluetoothSocket mBluetoothSocket; private InputStream mInputStream; private OutputStream mOutputStream; private Handler mHandler; public bluetoothController(Handler handler) { mHandler = handler; mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); } public boolean connect(String address) { BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address); UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); try { mBluetoothSocket = device.createRfcommSocketToServiceRecord(uuid); mBluetoothSocket.connect(); mInputStream = mBluetoothSocket.getInputStream(); mOutputStream = mBluetoothSocket.getOutputStream(); return true; } catch (IOException e) { e.printStackTrace(); return false; } } public void disconnect() { try { mBluetoothSocket.close(); } catch (IOException e) { e.printStackTrace(); } } public void write(byte[] bytes) { try { mOutputStream.write(bytes); } catch (IOException e) { e.printStackTrace(); } } public void read() { byte[] buffer = new byte[1024]; int bytes; while (true) { try { bytes = mInputStream.read(buffer); String message = new String(buffer, 0, bytes); Message msg = mHandler.obtainMessage(0, message); mHandler.sendMessage(msg); } catch (IOException e) { e.printStackTrace(); break; } } } }
这是一个蓝牙控制器的 Java 类,它可以连接到指定的蓝牙设备并发送和接收数据。它使用 BluetoothAdapter、BluetoothDevice 和 BluetoothSocket 类来管理蓝牙连接,使用 InputStream 和 OutputStream 类来读写数据。它还使用 Handler 和 Message 类来处理接收到的数据。如果你有任何关于这个类的问题,可以继续问我。
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
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。