Android串口通信（基于Tiny6410平台）

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);
        }
    }
}

main.xml代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android=""
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/choose_serialPort_text"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@+string/chooseserialPort" />

    <Spinner
        android:id="@+id/choose_seriaPort_spinner"
        android:layout_width="wrap_content"
        android:layout_height="40dp" >
    </Spinner>

    <TextView
        android:id="@+id/choose_baudRate_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@+string/choosebaudRate" />

    <Spinner
        android:id="@+id/choose_baudRate_spinner"
        android:layout_width="wrap_content"
        android:layout_height="40dp" >
    </Spinner>


            <TextView
                android:id="@+id/commucation_window"
                android:layout_width="fill_parent"
                android:layout_height="190dp" >
            </TextView>
    <EditText
        android:id="@+id/editmsg"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="edit here" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/sendButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@+string/send" />

        <Button
            android:id="@+id/stopButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/stopButton" />
    </LinearLayout>

</LinearLayout>