通过wifi向服务器端发送数据

来源：互联网发布：淘宝开店名字编辑：程序博客网时间：2024/05/27 09:44

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package com.zx.android; 
import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 
import android.content.Context; 
import android.widget.Toast; 
import java.io.BufferedReader; 
import java.io.BufferedWriter; 
import java.io.InputStreamReader; 
import java.io.OutputStreamWriter; 
import java.io.PrintWriter; 
import android.net.wifi.WifiManager; 
import java.net.Socket; 
import com.zx.android.ClientActivity; 
public class ClientActivityextends Activity {  
    /** Called when the activity is first created. */ 
    private Button startButton = null; 
     private Button stopButton = null; 
     private Button checkButton = null; 
     private WifiManager wifiManager = null; 
     private final String   DEBUG_TAG= "Activity01"; 
     private TextView   mTextView=null; 
     private EditText   mEditText=null; 
     private Button     mButton=null; 
   
  @Override 
  public void onCreate(Bundle savedInstanceState) {  
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.main); 
        mButton = (Button)findViewById(R.id.Button01);  
        mTextView=(TextView)findViewById(R.id.TextView01); 
        mEditText=(EditText)findViewById(R.id.EditText01); 
      startButton = (Button)findViewById(R.id.startWifi);  
      stopButton = (Button)findViewById(R.id.stopWifi);  
      checkButton = (Button)findViewById(R.id.checkWifi);  
      startButton.setOnClickListener(new StartWifiListener()); 
      stopButton.setOnClickListener(new StopWifiListener()); 
      checkButton.setOnClickListener(new CheckWifiListener()); 
     
    //登陆 
    mButton.setOnClickListener(new OnClickListener() 
    { 
        public void onClick(View v)  
        { 
            Socket socket = null; 
            String message = mEditText.getText().toString() + "/r/n";  
            try  
            {    
                //创建Socket 
                socket = new Socket("192.168.1.102",54321);  
                //向服务器端发送消息 
                PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);       
                out.println(message);  
                   
                //接收来自服务器端的消息 
                BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));  
                String msg = br.readLine();   
                   
                if ( msg != null ) 
                { 
                    mTextView.setText(msg); 
                } 
                else 
                { 
                    mTextView.setText("数据错误!"); 
                } 
                //关闭流 
                out.close(); 
                br.close(); 
                //关闭Socket 
                socket.close();  
            } 
            catch (Exception e)   
            { 
                // TODO: handle exception  
                Log.e(DEBUG_TAG, e.toString());  
            } 
        } 
    }); 
} 
  class StartWifiListenerimplements OnClickListener{ 
      public void onClick(View v) {  
       wifiManager = (WifiManager)ClientActivity.this.getSystemService(Context.WIFI_SERVICE); 
       wifiManager.setWifiEnabled(true); 
       System.out.println("wifi state --->" + wifiManager.getWifiState());  
       Toast.makeText(ClientActivity.this,"当前Wifi网卡状态为" +  
    wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();  
      } 
        } 
  class StopWifiListenerimplements OnClickListener{ 
      public void onClick(View arg0) {  
       wifiManager = (WifiManager)ClientActivity.this.getSystemService(Context.WIFI_SERVICE); 
       wifiManager.setWifiEnabled(false); 
       System.out.println("wifi state --->" + wifiManager.getWifiState());  
       Toast.makeText(ClientActivity.this,"当前Wifi网卡状态为" +  
    wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();  
      } 
           
        } 
           
  class CheckWifiListenerimplements OnClickListener{ 
      public void onClick(View v) {  
       wifiManager = (WifiManager)ClientActivity.this.getSystemService(Context.WIFI_SERVICE); 
       System.out.println("wifi state --->" + wifiManager.getWifiState());  
       Toast.makeText(ClientActivity.this,"当前Wifi网卡状态为" +  
    wifiManager.getWifiState(), Toast.LENGTH_SHORT).show();  
      } 
            
        } 
}

0_13090842637boz

这个是我在手机上运行时截的图，下面三个按钮是操作wifi网关的按钮，下面的那个提示框是按下这个按钮出现的，数字为0表示正在关闭wifi，数字2表示正在开启wifi，数字1表示wifi处于关闭状态，数字3表示 wifi处于开启状态。

上面的的发送按钮可以发送数据到服务器，实验室的是局域网，没有无线网络，我利用一个无线路由与电脑相连，在利用手机wifi搜索到该网络，手机与电脑构成局域网，便可发送数据。至于服务器端，可以采用网络调试助手接收数据，协议选择TCP服务器，ip地址和端口视自己情况定。

当然也可以自己写个服务器端程序，再在命令行窗口中显示接收到的数据。

服务器端程序：

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package com.zx.android; 
import java.io.BufferedReader; 
import java.io.BufferedWriter; 
import java.io.InputStreamReader; 
import java.io.OutputStreamWriter; 
import java.io.PrintWriter; 
import java.net.ServerSocket; 
import java.net.Socket; 
public class Serverimplements Runnable 
{ 
    public void run() 
    { 
        try 
        { 
            //创建ServerSocket 
            ServerSocket serverSocket = new ServerSocket(54321); 
            while (true) 
            { 
                //接受客户端请求 
                Socket client = serverSocket.accept();  
                System.out.println("accept"); 
                try 
                { 
                    //接收客户端消息 
                    BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream())); 
                    String str = in.readLine();  
                    System.out.println("read:" + str);      
                    //向服务器发送消息 
                    PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(client.getOutputStream())),true);       
                    out.println("server message");  
                    //关闭流 
                    out.close(); 
                    in.close(); 
                } 
                catch (Exception e)  
                { 
                    System.out.println(e.getMessage()); 
                    e.printStackTrace(); 
                } 
                finally 
                { 
                    //关闭 
                    client.close(); 
                    System.out.println("close"); 
                } 
            } 
        } 
        catch (Exception e)  
        { 
            System.out.println(e.getMessage()); 
        } 
    } 
    //main函数，开启服务器 
    public static void main(String[] args)  
    { 
        Thread desktopServerThread = new Thread(new Server()); 
        desktopServerThread.start(); 
    } 
}

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