python android 串口通信源码

以下是一个简单的Python与Android串口通信的示例代码：

Python端代码：

import serial

ser = serial.Serial('/dev/ttyUSB0', 9600, timeout=1)  # 打开串口

while True:
    data = ser.readline().decode('utf-8').strip()  # 读取串口数据
    if data:
        print(data)  # 处理数据

ser.close()  # 关闭串口

Android端代码：

import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android_serialport_api.SerialPort;

public class SerialPortManager {

    private static final String TAG = "SerialPortManager";

    private SerialPort mSerialPort;
    private OutputStream mOutputStream;
    private InputStream mInputStream;
    private ReadThread mReadThread;
    private OnDataReceiveListener mOnDataReceiveListener;

    private boolean isStop = false;

    private static SerialPortManager instance;

    public static SerialPortManager getInstance() {
        if (instance == null) {
            synchronized (SerialPortManager.class) {
                if (instance == null) {
                    instance = new SerialPortManager();
                }
            }
        }
        return instance;
    }

    public void openSerialPort(String path, int baudRate) {
        try {
            mSerialPort = new SerialPort(path, baudRate, 0);
            mOutputStream = mSerialPort.getOutputStream();
            mInputStream = mSerialPort.getInputStream();
            mReadThread = new ReadThread();
            mReadThread.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void closeSerialPort() {
        isStop = true;
        if (mReadThread != null) {
            mReadThread.interrupt();
        }
        if (mSerialPort != null) {
            mSerialPort.close();
            mSerialPort = null;
        }
        if (mOutputStream != null) {
            try {
                mOutputStream.close();
                mOutputStream = null;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (mInputStream != null) {
            try {
                mInputStream.close();
                mInputStream = null;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public void send(byte[] data) {
        try {
            if (mOutputStream != null) {
                mOutputStream.write(data);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void setOnDataReceiveListener(OnDataReceiveListener listener) {
        mOnDataReceiveListener = listener;
    }

    public interface OnDataReceiveListener {
        void onDataReceive(byte[] buffer, int size);
    }

    private class ReadThread extends Thread {
        @Override
        public void run() {
            super.run();
            while (!isStop && !isInterrupted()) {
                try {
                    if (mInputStream == null) {
                        return;
                    }
                    byte[] buffer = new byte[1024];
                    int size = mInputStream.read(buffer);
                    if (size > 0) {
                        if (mOnDataReceiveListener != null) {
                            mOnDataReceiveListener.onDataReceive(buffer, size);
                        }
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                    return;
                }
            }
        }
    }
}

在Android应用程序中，你可以使用以下代码来使用SerialPortManager：

SerialPortManager.getInstance().openSerialPort(path, baudRate);
SerialPortManager.getInstance().setOnDataReceiveListener(new SerialPortManager.OnDataReceiveListener() {
    @Override
    public void onDataReceive(byte[] buffer, int size) {
        // 处理数据
    }
});
SerialPortManager.getInstance().send(data);
SerialPortManager.getInstance().closeSerialPort();

其中，path是串口设备的路径，baudRate是波特率，data是要发送的数据。注意，Android应用程序需要获取串口设备的读写权限。