Android串口通信（基于Tiny6410平台）

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友善之臂的Android系统有他们自己编写的一个串口通信程序，网上没有找到他的源代码，而且界面操作不在一个界面，不是很方便，这里我自己写了一个粗糙点的串口通信程序。

同样这里还是调用友善之臂的friendlyarm-hardware.so库文件。

在Android工程文件下面加入com.friendlyarm.androidSDK包，在其下添加HardwareControler.java。下面我把我做的截图发上来。

主程序代码：

package geekle.lab;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.friendlyarm.AndroidSDK.HardwareControler;
public class SerialPortActivity extends Activity
{
private static final String[] serial_port={"/dev/s3c2410_serial0","/dev/s3c2410_serial1","/dev/s3c2410_serial2"};
private static final String[] baud_rate={"4800","9600","19200","115200"};
TextView chooseserialPortView;
TextView choosebaudRateView;
TextView commucationView;
EditText editmsg;
private Button stopButton;
private Button sendButton;
private Spinner choose_serialport;
private Spinner choose_baudrate;
private ArrayAdapter<String> serialportAdapter;
private ArrayAdapter<String> baudrateAdaptera;
private int fd = 0;
String thread = "readThread";
String choosed_serial = "/dev/s3c2410_serial2";
int choosed_buad = 19200;
byte[] buf= new byte[300];
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);//设置全屏
chooseserialPortView = (TextView)findViewById(R.id.choose_serialPort_text);
choose_serialport = (Spinner)findViewById(R.id.choose_seriaPort_spinner);
chooseserialPortView = (TextView)findViewById(R.id.choose_baudRate_text);
choose_baudrate = (Spinner)findViewById(R.id.choose_baudRate_spinner);
serialportAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,serial_port);//建立下拉控件的适配器
baudrateAdaptera = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,baud_rate);
serialportAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
baudrateAdaptera.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
choose_serialport.setAdapter(serialportAdapter);//连接控件和适配器
choose_baudrate.setAdapter(baudrateAdaptera);
choose_serialport.setSelection(2);
choose_baudrate.setSelection(2);
choose_serialport.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()
{
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
choosed_serial = serial_port[arg2];
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
choose_baudrate.setOnItemSelectedListener(new Spinner.OnItemSelectedListener()
{
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
choosed_buad = Integer.parseInt(baud_rate[arg2]);
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
fd = HardwareControler.openSerialPort(choosed_serial,choosed_buad, 8, 1);//打开串口
if (fd != -1) {
Toast.makeText(getApplicationContext(), getResources().getString(R.string.open_serial_success)+choosed_serial, 1).show();
} else {
Toast.makeText(this, getResources().getString(R.string.open_fail), 1).show();
}
stopButton = (Button)findViewById(R.id.stopButton);
stopButton.setOnClickListener(new ClickEvent());
sendButton = (Button)findViewById(R.id.sendButton);//发送消息
sendButton.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
HardwareControler.write(fd, editmsg.getText().toString().getBytes());
commucationView.append(editmsg.getText()+"\n");
}
});
commucationView = (TextView)findViewById(R.id.commucation_window);
commucationView.setMovementMethod(ScrollingMovementMethod.getInstance()); //让textview实现滚动
editmsg = (EditText)findViewById(R.id.editmsg);
new readThread().start();//开始串口的监听线程
}
public class ClickEvent implements Button.OnClickListener//退出
{
public void onClick(View arg0) {
// TODO Auto-generated method stub
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(0);
}
}
Handler handler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.arg1) {
case 0:
int len = HardwareControler.read(fd, buf, 300);
String string = new String(buf, 0, len);
commucationView.append(string+"\n");
new readThread().start();//处理完消息后立即开启监听线程
Log.d(thread,"接收到数据，新线程启动");
break;
case 1:
HardwareControler.setLedState(1, 0);
new readThread().start();
// Log.d(thread,"没有数据，新线程启动");
break;
default:
break;
}
}
};
class readThread extends Thread//读取串口信息线程
{
public void run()
{
Message msg = new Message();
HardwareControler.setLedState(0, 0);
if (HardwareControler.select(fd,5, 0)==1) {
msg.arg1 = 0;
}
else {
msg.arg1 =1;
HardwareControler.setLedState(0, 1);
}
handler.sendMessage(msg);
}
}
}