Android实现测试串口自发自收程序
时间: 2024-05-16 20:15:12 浏览: 11
要在Android上实现测试串口自发自收程序,需要使用Android的SerialPort API。下面是一个简单的示例代码:
```
public class SerialPortActivity extends AppCompatActivity {
private SerialPort mSerialPort;
private OutputStream mOutputStream;
private InputStream mInputStream;
private ReadThread mReadThread;
private TextView mTextView;
private EditText mEditText;
private Button mSendButton;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_serial_port);
mTextView = findViewById(R.id.text_view);
mEditText = findViewById(R.id.edit_text);
mSendButton = findViewById(R.id.send_button);
// 打开串口
try {
mSerialPort = new SerialPort(new File("/dev/ttyS1"), 9600, 0);
mOutputStream = mSerialPort.getOutputStream();
mInputStream = mSerialPort.getInputStream();
} catch (IOException e) {
e.printStackTrace();
}
// 启动读取线程
mReadThread = new ReadThread();
mReadThread.start();
// 发送按钮点击事件
mSendButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String data = mEditText.getText().toString() + "\r\n";
try {
mOutputStream.write(data.getBytes());
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
// 关闭串口
if (mSerialPort != null) {
mSerialPort.close();
mSerialPort = null;
}
}
private class ReadThread extends Thread {
@Override
public void run() {
super.run();
while (!isInterrupted()) {
int size;
try {
byte[] buffer = new byte[64];
if (mInputStream == null) return;
size = mInputStream.read(buffer);
if (size > 0) {
String data = new String(buffer, 0, size);
runOnUiThread(new Runnable() {
@Override
public void run() {
mTextView.setText(data);
}
});
}
} catch (IOException e) {
e.printStackTrace();
return;
}
}
}
}
}
```
在这个示例中,我们使用了/dev/ttyS1作为串口设备,并且设置波特率为9600。然后在UI线程中,我们监听了发送按钮的点击事件,并且使用SerialPort的OutputStream向串口发送数据。同时,我们在另外一个线程中不断读取串口的数据,并且将读取到的数据更新到UI上。最后,在Activity销毁的时候,我们关闭了串口。