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今天小编跟大家分享的是android的WIFI小车编程介绍，android中的WIFI小车编程注意事项有哪些，为了让大家更加了解android的WIFI小车编程，给大家总结了以下内容，一起往下看吧。
小车是四个轮子的，每个轮子上都有电机驱动，前进后退的时候四个轮子同时前进和后退，转弯的时候，小车两边的轮子按反方向转。
为了达到更好的操作效果（一直按下前进，小车前进，按下左右转小车左右转，松开左右转，小车继续前进。松开前进，小车停止。后退同理），在单片机程序里加入了前进或后退的标志位。先说明一下，，，，，，
按下前进向单片机发送‘0’，按下后退向单片机发送‘1’，按下左转向单片机发送‘2’,按下右转向单片机发送‘3’，松开前进或后退向单片机发送‘5’，松开左转或右转向单片机发送‘6’，这样子发数据也是为了获得更好的操作体验
前进 后退 左转 右转按钮是使用的setOnTouchListener方法，以便在按钮按下或松开时发送数据，
就看一下前进代码
我在前面声明了一下
//前进
private OnTouchListener forwordButtonTouch = new OnTouchListener() {
@Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub
switch (event.getAction()) { case MotionEvent.ACTION_DOWN://如果按下 try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("0".getBytes());//发送0
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} break; case MotionEvent.ACTION_UP://如果松开 try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("5".getBytes());//发送‘5’
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
};
//源码package com.wifi_Contrl;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.InetAddress;import java.net.Socket;import android.annotation.SuppressLint;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnTouchListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;
@SuppressLint("ClickableViewAccessibility") public class MainActivity extends Activity { boolean isConnect=true;//连接还是断开
Button connectButton;//定义连接按钮
Button forwordButton;//定义前进按钮
Button backButton;//定义后退按钮
Button leftButton;//定义左转按钮
Button righButton;//定义右转按钮
EditText ipEditText;//定义ip输入框
EditText portText;//定义端口输入框
Socket socket = null;//定义socket
private InputStream inputStream=null;//定义输入流
private OutputStream outputStream=null;//定义输出流 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
connectButton = (Button) findViewById(R.id.btConnect);
forwordButton = (Button) findViewById(R.id.btqianjin);
backButton = (Button) findViewById(R.id.bthoutui);
leftButton = (Button) findViewById(R.id.btzuozhuan);
righButton = (Button) findViewById(R.id.btyuozhuan);
ipEditText = (EditText) findViewById(R.id.etIP);
portText = (EditText) findViewById(R.id.etPort);
connectButton.setOnClickListener(connectButtonListener);
forwordButton.setOnTouchListener(forwordButtonTouch);
backButton.setOnTouchListener(backButtonTouch);
leftButton.setOnTouchListener(leftButtonTouch);
righButton.setOnTouchListener(righButtonTouch);
} //连接
private OnClickListener connectButtonListener = new OnClickListener() {
@Override public void onClick(View v) { // TODO Auto-generated method stub
if (isConnect == true) //标志位 = true表示连接 {
isConnect = false;//置为false
connectButton.setText("断开");//按钮上显示--断开 //打开连接线程
Connect_Thread connect_Thread = new Connect_Thread();
connect_Thread.start();
} else //标志位 = false表示退出连接 {
isConnect = true;//置为true
connectButton.setText("连接");//按钮上显示连接
Toast.makeText(MainActivity.this,"已退出连接！", Toast.LENGTH_SHORT).show(); try
{
socket.close();//关闭连接
socket=null;
}
catch (IOException e)
{ // TODO Auto-generated catch block e.printStackTrace();
}
}
}
}; //前进
private OnTouchListener forwordButtonTouch = new OnTouchListener() {
@Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub
switch (event.getAction()) { case MotionEvent.ACTION_DOWN: try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("0".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} break; case MotionEvent.ACTION_UP: try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("5".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
}; //后退
private OnTouchListener backButtonTouch = new OnTouchListener() {
@Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub
switch (event.getAction()) { case MotionEvent.ACTION_DOWN: try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("1".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} break; case MotionEvent.ACTION_UP: try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("5".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
}; //左转
private OnTouchListener leftButtonTouch = new OnTouchListener() {
@Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub
switch (event.getAction()) { case MotionEvent.ACTION_DOWN: try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("2".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} break; case MotionEvent.ACTION_UP: try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("6".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
}; //右转
private OnTouchListener righButtonTouch = new OnTouchListener() {
@Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub
switch (event.getAction()) { case MotionEvent.ACTION_DOWN: try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("3".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} break; case MotionEvent.ACTION_UP: try
{ //获取输出流
outputStream = socket.getOutputStream(); //发送数据 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("6".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
}; //连接线程
class Connect_Thread extends Thread//继承Thread { public void run()//重写run方法 { try
{ if (socket == null)
{ //用InetAddress方法获取ip地址
InetAddress ipAddress = InetAddress.getByName(ipEditText.getText().toString()); int port =Integer.valueOf(portText.getText().toString());//获取端口号
socket = new Socket(ipAddress, port);//创建连接地址和端口
if (socket !=null) {
runOnUiThread(new Runnable()
{ public void run()
{
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this,"已成功连接！", Toast.LENGTH_SHORT).show();
}
});
}
}
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
}
}
}
}