(转自http://www.cnblogs.com/zhxiang/archive/2011/07/21/2112825.html)
客户端程序:
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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 ClientActivity extends 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 StartWifiListener implements 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 StopWifiListener implements 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 CheckWifiListener implements 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();
}
}
} |
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 Server implements 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();
}
} |