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今天小編跟大家分享的是android的WIFI小車編程介紹，android中的WIFI小車編程注意事項有哪些，為了讓大家更加了解android的WIFI小車編程，給大家總結了以下內容，一起往下看吧。
小車是四個輪子的，每個輪子上都有電機驅動，前進后退的時候四個輪子同時前進和后退，轉彎的時候，小車兩邊的輪子按反方向轉。
為了達到更好的操作效果（一直按下前進，小車前進，按下左右轉小車左右轉，松開左右轉，小車繼續前進。松開前進，小車停止。后退同理），在單片機程序里加入了前進或后退的標志位。先說明一下，，，，，，
按下前進向單片機發送‘0’，按下后退向單片機發送‘1’，按下左轉向單片機發送‘2’,按下右轉向單片機發送‘3’，松開前進或后退向單片機發送‘5’，松開左轉或右轉向單片機發送‘6’，這樣子發數據也是為了獲得更好的操作體驗
前進 后退 左轉 右轉按鈕是使用的setOnTouchListener方法，以便在按鈕按下或松開時發送數據，
就看一下前進代碼
我在前面聲明了一下
//前進
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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("0".getBytes());//發送0
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} break; case MotionEvent.ACTION_UP://如果松開 try
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("5".getBytes());//發送‘5’
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
};
//源碼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;//連接還是斷開
Button connectButton;//定義連接按鈕
Button forwordButton;//定義前進按鈕
Button backButton;//定義后退按鈕
Button leftButton;//定義左轉按鈕
Button righButton;//定義右轉按鈕
EditText ipEditText;//定義ip輸入框
EditText portText;//定義端口輸入框
Socket socket = null;//定義socket
private InputStream inputStream=null;//定義輸入流
private OutputStream outputStream=null;//定義輸出流 @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);
} //連接
private OnClickListener connectButtonListener = new OnClickListener() {
@Override public void onClick(View v) { // TODO Auto-generated method stub
if (isConnect == true) //標志位 = true表示連接 {
isConnect = false;//置為false
connectButton.setText("斷開");//按鈕上顯示--斷開 //打開連接線程
Connect_Thread connect_Thread = new Connect_Thread();
connect_Thread.start();
} else //標志位 = false表示退出連接 {
isConnect = true;//置為true
connectButton.setText("連接");//按鈕上顯示連接
Toast.makeText(MainActivity.this,"已退出連接！", Toast.LENGTH_SHORT).show(); try
{
socket.close();//關閉連接
socket=null;
}
catch (IOException e)
{ // TODO Auto-generated catch block e.printStackTrace();
}
}
}
}; //前進
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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("5".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
}; //左轉
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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("6".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
}; //右轉
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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //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
{ //獲取輸出流
outputStream = socket.getOutputStream(); //發送數據 //outputStream.write(msgEditText.getText().toString().getBytes());
outputStream.write("6".getBytes());
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
} default: break;
} return false;
}
}; //連接線程
class Connect_Thread extends Thread//繼承Thread { public void run()//重寫run方法 { try
{ if (socket == null)
{ //用InetAddress方法獲取ip地址
InetAddress ipAddress = InetAddress.getByName(ipEditText.getText().toString()); int port =Integer.valueOf(portText.getText().toString());//獲取端口號
socket = new Socket(ipAddress, port);//創建連接地址和端口
if (socket !=null) {
runOnUiThread(new Runnable()
{ public void run()
{
// TODO Auto-generated method stub
Toast.makeText(MainActivity.this,"已成功連接！", Toast.LENGTH_SHORT).show();
}
});
}
}
}
catch (Exception e)
{ // TODO Auto-generated catch block e.printStackTrace();
}
}
}
}
//布局源碼，大神勿噴，小弟才入門android，所以關于布局還，，，，，<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@android:color/holo_purple" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.wifi_Contrl.MainActivity" > <!-- IP地址 : --> <TextView android:id="@+id/tvIP" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="IP地址 :" android:textSize="23dp" android:layout_x="0dp" android:layout_y="0dp" /> <!-- 左轉 --> <Button android:id="@+id/btzuozhuan" android:layout_width="wrap_content" android:layout_height="80dp" android:layout_x="400dp" android:layout_y="118dp" android:text="左轉" /> <!-- 右轉 --> <Button android:id="@+id/btyuozhuan" android:layout_width="wrap_content" android:layout_height="80dp" android:layout_x="520dp" android:layout_y="118dp" android:text="右轉" /> <!-- 后退 --> <Button android:id="@+id/bthoutui" android:layout_width="wrap_content" android:layout_height="90dp" android:layout_x="105dp" android:layout_y="200dp" android:text="后退" /> <!-- 前進 --> <Button android:id="@+id/btqianjin" android:layout_width="wrap_content" android:layout_height="90dp" android:layout_marginBottom="21dp" android:layout_x="105dp" android:layout_y="65dp" android:text="前進" /> <!-- 連接 --> <Button android:id="@+id/btConnect" android:layout_width="wrap_content" android:layout_height="40dp" android:layout_marginBottom="21dp" android:layout_x="500dp" android:text="連接" /> <!-- 端口號 : --> <TextView android:id="@+id/tvPort" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_x="280dp" android:layout_y="0dp" android:text="端口號 :" android:textSize="23dp" /> <!-- 輸入端口地址的文本控件 --> <EditText android:id="@+id/etPort" android:layout_width="70dp" android:layout_height="30dp" android:layout_x="380dp" android:layout_y="0dp" android:background="@android:color/white" android:ems="10" android:text="8080" /> <!-- 輸入ip地址的文本控件 --> <EditText android:id="@+id/etIP" android:layout_width="150dp" android:layout_height="30dp" android:layout_x="100dp" android:layout_y="0dp" android:background="@android:color/white" android:ems="10" android:text="192.168.4.1" > <requestFocus /> </EditText> </AbsoluteLayout>
再看單片機，因為學實時操作系統UCOSII的時候，寫程序就養成了這樣寫程序習慣，如果對于這樣
#ifndef _USART_C_//如果沒有定義_USART_C_
#define _USART_C_ extern
#else
#define _USART_C_
#endif
_USART_C_ unsigned char Usart_Receive[20];
_USART_C_ unsigned char Usart_Cnt;
_USART_C_ bit Usart_AT_flage;
_USART_C_ bit Command_Flag;
_USART_C_ unsigned char UsartData;
_USART_C_ void InitUART(void);//串口初始化
_USART_C_ void SendOneByte(unsigned char c);//發送字節型數據
_USART_C_ void UartSends(unsigned char *str);//串行口連續發送char型數組，遇到終止號/0將停止
其實這樣寫，有助于各個c文件之間調用變量。說一下
#ifndef _USART_C_//如果沒有定義_USART_C_
#define _USART_C_ extern//就定義_USART_C_ 為extern
#else//否則
#define _USART_C_就定義_USART_C_為空
#endif
如果是自身文件編譯由于我在USART.C文件的開頭加上了#define _USART_C_所以，就定義_USART_C_為空
即 unsigned char Usart_Receive[20];
如果別的文件編譯那么因為別的文件沒有定義#define _USART_C_ 所以就定義_USART_C_ 為extern
即extern unsigned char Usart_Receive[20];
對于extern 這應該不陌生吧，好了接著往下看，
不好意思再啰嗦下，我把所有的.h文件全放在了一個.h文件中，這樣在每個c文件的開頭只需加上#include "include.h"就方便多了
#define _MAIN_C_#include "include.h"sbit a1 = P1^0;//前左輪前進sbit a2 = P1^1;//前左輪后退sbit a3 = P1^2;//前右輪前進sbit a4 = P1^3;//前右輪后進sbit a5 = P1^4;//后左輪前進sbit a6 = P1^5;//后左輪后退sbit a7 = P1^6;//后右輪前進sbit a8 = P1^7;//后右輪后進bit forword_flag=0; bit back_flag=0; unsigned char CWMODE[]="AT+CWMODE=2\r\n"; //設置模塊的工作的模式為AP模式unsigned char RST[]="AT+RST\r\n"; //重啟模塊使AT+CWMODE=2模式生效unsigned char CIPMUX[]="AT+CIPMUX=1\r\n"; //啟動多連接unsigned char CIPSERVER[]="AT+CIPSERVER=1,8080\r\n";//開啟服務器模式，端口號8080void delay1s(void) //誤差 -0.00000000024us{ unsigned char a,b,c; for(c=95;c>0;c--)for(b=26;b>0;b--)for(a=185;a>0;a--); }//多連接AP模式void ManyConnect_AP() { P0=0x00; while(1) { UartSends(CWMODE);//返回ok delay1s(); if(Usart_AT_flage ==1) { if(strstr(Usart_Receive, "OK") ) { Usart_AT_flage = 0; P0 = 0x01; break; } } } UartSends(RST);//返回一大溜，不用判斷返回delay1s(); delay1s(); while(1) { UartSends(CIPMUX);//返回ok delay1s(); if(Usart_AT_flage ==1) { if(strstr(Usart_Receive, "OK") ) { Usart_AT_flage = 0; P0 = 0x03; break; } } } while(1) { UartSends(CIPSERVER);//返回ok，多了也返回ok delay1s(); if(Usart_AT_flage ==1) { if(strstr(Usart_Receive, "OK") ) { Usart_AT_flage = 0; P0 = 0x07; break; } } } }void main() { InitUART(); while(1) { ManyConnect_AP();//多連接AP模式while(1) { //由于消息的開頭是+IP 故做此判斷if((Usart_Receive[0]=='+')&&(Usart_Receive[1]=='I')&&(Usart_Receive[2]=='P')) { if((Usart_Receive[3]=='D')&&(Usart_Receive[6]==',')) { if(Usart_Receive[9]=='0')//前進{ forword_flag = 1;//前進標志位置一back_flag = 0; //后退標志位置零a1 = 1;//前左輪前進a2 = 0;//前左輪后退a3 = 1;//前右輪前進a4 = 0;//前右輪后進a5 = 1;//后左輪前進a6 = 0;//后左輪后退a7 = 1;//后右輪前進a8 = 0;//后右輪后進/*sbit a1 = P1^0;//前左輪前進 sbit a2 = P1^0;//前左輪后退 sbit a3 = P1^1;//前右輪前進 sbit a4 = P1^2;//前右輪后進 sbit a5 = P1^3;//后左輪前進 sbit a6 = P1^0;//后左輪后退 sbit a7 = P1^0;//后右輪前進 sbit a8 = P1^1;//后右輪后進*/ }if(Usart_Receive[9]=='1')//后退{ forword_flag = 0;//前進標志位置一back_flag = 1; //后退標志位置零a1 = 0;//前左輪前進a2 = 1;//前左輪后退a3 = 0;//前右輪前進a4 = 1;//前右輪后進a5 = 0;//后左輪前進a6 = 1;//后左輪后退a7 = 0;//后右輪前進a8 = 1;//后右輪后進}if(Usart_Receive[9]=='6')//左右轉停止{if(forword_flag == 1 && back_flag == 0)//上一次按下的是前進，沒松開{ //前進a1 = 1;//前左輪前進a2 = 0;//前左輪后退a3 = 1;//前右輪前進a4 = 0;//前右輪后進a5 = 1;//后左輪前進a6 = 0;//后左輪后退a7 = 1;//后右輪前進a8 = 0;//后右輪后進}if(forword_flag == 0 && back_flag == 1)//上一次按下的是后退，沒松開{ //后退a1 = 0;//前左輪前進a2 = 1;//前左輪后退a3 = 0;//前右輪前進a4 = 1;//前右輪后進a5 = 0;//后左輪前進a6 = 1;//后左輪后退a7 = 0;//后右輪前進a8 = 1;//后右輪后進}if(forword_flag == 0 && back_flag == 0)//上一次松開了前進或后退{ //停止a1 = 0;//前左輪前進a2 = 0;//前左輪后退a3 = 0;//前右輪前進a4 = 0;//前右輪后進a5 = 0;//后左輪前進a6 = 0;//后左輪后退a7 = 0;//后右輪前進a8 = 0;//后右輪后進} }if(Usart_Receive[9]=='2')//左轉{ a1 = 0;//前左輪前進a2 = 1;//前左輪后退a3 = 1;//前右輪前進a4 = 0;//前右輪后進a5 = 0;//后左輪前進a6 = 1;//后左輪后退a7 = 1;//后右輪前進a8 = 0;//后右輪后退}if(Usart_Receive[9]=='3')//右轉{ a1 = 1;//前左輪前進a2 = 0;//前左輪后退a3 = 0;//前右輪前進a4 = 1;//前右輪后進a5 = 1;//后左輪前進a6 = 0;//后左輪后退a7 = 0;//后右輪前進a8 = 1;//后右輪后退}if(Usart_Receive[9]=='5')//停止{ forword_flag = 0;//前進標志位置零back_flag = 0; //后退標志位置零a1 = 0;//前左輪前進a2 = 0;//前左輪后退a3 = 0;//前右輪前進a4 = 0;//前右輪后進a5 = 0;//后左輪前進a6 = 0;//后左輪后退a7 = 0;//后右輪前進a8 = 0;//后右輪后進} } } } } }
#define _USART_C_#include "include.h"unsigned char Usart_Receive[20]={0};
unsigned char Usart_Cnt=0;
bit Usart_AT_flage;
bit flage;
bit Command_Flag;void InitUART(void)
{
TMOD = 0x20;
SCON = 0x50;
TH1 = 0xFD;
TL1 = TH1;
PCON = 0x00;
EA = 1;
ES = 1;
TR1 = 1;
}void SendOneByte(unsigned char c)
{
SBUF = c; while(!TI);
TI = 0;
}//串行口連續發送char型數組，遇到終止號/0(空格)將停止void UartSends(unsigned char *str)
{ while(*str!='\0')
{
SBUF=*str; while(!TI);//等待發送完成信號（TI=1）出現
TI=0;
str++;
}
}void UARTInterrupt(void) interrupt 4{
RI=0;
Usart_Receive[Usart_Cnt]=SBUF;//接收串口數據
Usart_Cnt++;//
//返回數據以回車結尾，有回車，而且數據個數大于2，說明接收到了數據
if(Usart_Receive[Usart_Cnt-2]=='\r' && Usart_Receive[Usart_Cnt-1]=='\n' && Usart_Cnt >= 2)
{
Usart_Cnt = 0;//接收數據計數清零
Usart_AT_flage = 1;//數據接收成功標志位 } else if(Usart_Cnt > 20)// {
Usart_Cnt = 0;
}
}
#ifndef __USART_H_#define __USART_H_#ifndef _USART_C_#define _USART_C_ extern#else#define _USART_C_#endif_USART_C_ unsigned char Usart_Receive[20]; _USART_C_ unsigned char Usart_Cnt; _USART_C_ bit Usart_AT_flage; _USART_C_ bit Command_Flag; _USART_C_ unsigned char UsartData; _USART_C_ void InitUART(void);//串口初始化_USART_C_ void SendOneByte(unsigned char c);//發送字節型數據_USART_C_ void UartSends(unsigned char *str);//串行口連續發送char型數組，遇到終止號/0將停止#endif
#include <REGX52.H>#include "USART.h"#include <string.h>
看完上訴內容，你們掌握android的WIFI小車編程方法了嗎？如果想了解更多，歡迎關注億速云行業資訊頻道！
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