android串口编程实例(含代码示例)

Android串口编程实例是指使用Android系统开发板进行串口编程的实例,主要用于实现Android系统与外部设备的数据通信。是一个简单的Android串口编程实例,可以实现Android系统与外部设备之间的数据传输:

Android串口编程实例是指使用Android系统开发板进行串口编程的实例,主要用于实现Android系统与外部设备的数据通信。是一个简单的Android串口编程实例,可以实现Android系统与外部设备之间的数据传输:

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

import android.widget.TextView;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.security.InvalidParameterException;

import android_serialport_api.SerialPort;

public class SerialPortActivity extends Activity {

protected SerialPort mSerialPort;

protected OutputStream mOutputStream;

private InputStream mInputStream;

private ReadThread mReadThread;

private TextView textView;

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) {

onDataReceived(buffer, size);

}

} catch (IOException e) {

e.printStackTrace();

return;

}

}

}

}

private void DisplayError(int resourceId) {

Log.d("SerialPortActivity", "DisplayError");

}

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

textView = (TextView) findViewById(R.id.textView);

try {

mSerialPort = new SerialPort(new File("/dev/ttyS1"), 9600, 0);

mOutputStream = mSerialPort.getOutputStream();

mInputStream = mSerialPort.getInputStream();

/* Create a receiving thread */

mReadThread = new ReadThread();

mReadThread.start();

} catch (SecurityException e) {

DisplayError(R.string.error_security);

} catch (IOException e) {

DisplayError(R.string.error_unknown);

} catch (InvalidParameterException e) {

DisplayError(R.string.error_configuration);

}

}

protected void onDataReceived(final byte[] buffer, final int size) {

runOnUiThread(new Runnable() {

public void run() {

String str=new String(buffer,0,size);

textView.setText(str);

}

});

}

@Override

protected void onDestroy() {

if (mReadThread != null)

mReadThread.interrupt();

mSerialPort.close();

mSerialPort = null;

super.onDestroy();

}

}

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