Android WiFi 应用程序例子

  首先需要强调一点的是wifi只能在真机上测试！

        在Android里，所有的wifi操作都在android.net.wifi包里，而常用的类也就只用几个，对于一般的开发人员来说，常用的操作也是有限的，不需要刻意的去记，用的时候现查就ok了，下面是《Android应用开发揭秘》里面关于wifi的范例，个人感觉还挺齐全，跟大家分享一下！

package com.yarin.android.Examples_08_08;
import java.util.List;
import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.net.wifi.WifiManager.WifiLock;
public class WifiAdmin
{
    //定义WifiManager对象
    private WifiManager mWifiManager;
    //定义WifiInfo对象
    private WifiInfo mWifiInfo;
    //扫描出的网络连接列表
    private List<ScanResult> mWifiList;
    //网络连接列表
    private List<WifiConfiguration> mWifiConfiguration;
    //定义一个WifiLock
    WifiLock mWifiLock;
    //构造器
    public  WifiAdmin(Context context)
    {
        //取得WifiManager对象
        mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
        //取得WifiInfo对象
        mWifiInfo = mWifiManager.getConnectionInfo();
    }
    //打开WIFI
    public void OpenWifi()
    {
        if (!mWifiManager.isWifiEnabled())
        {
            mWifiManager.setWifiEnabled(true);

        }
    }
    //关闭WIFI
    public void CloseWifi()
    {
        if (!mWifiManager.isWifiEnabled())
        {
            mWifiManager.setWifiEnabled(false);
        }
    }
    //锁定WifiLock
    public void AcquireWifiLock()
    {
        mWifiLock.acquire();
    }
    //解锁WifiLock
    public void ReleaseWifiLock()
    {
        //判断时候锁定
        if (mWifiLock.isHeld())
        {
            mWifiLock.release();
        }
    }
    //创建一个WifiLock
    public void CreatWifiLock()
    {
        mWifiLock = mWifiManager.createWifiLock("Test");
    }
    //得到配置好的网络
    public List<WifiConfiguration> GetConfiguration()
    {
        return mWifiConfiguration;
    }
    //指定配置好的网络进行连接
    public void ConnectConfiguration(int index)
    {
        //索引大于配置好的网络索引返回
        if(index > mWifiConfiguration.size())
        {
            return;
        }
        //连接配置好的指定ID的网络
        mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId, true);
    }
    public void StartScan()
    {
        mWifiManager.startScan();
        //得到扫描结果
        mWifiList = mWifiManager.getScanResults();
        //得到配置好的网络连接
        mWifiConfiguration = mWifiManager.getConfiguredNetworks();
    }
    //得到网络列表
    public List<ScanResult> GetWifiList()
    {
        return mWifiList;
    }
    //查看扫描结果
    public StringBuilder LookUpScan()
    {
        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i < mWifiList.size(); i++)
        {
            stringBuilder.append("Index_"+new Integer(i + 1).toString() + ":");
            //将ScanResult信息转换成一个字符串包
            //其中把包括：BSSID、SSID、capabilities、frequency、level
            stringBuilder.append((mWifiList.get(i)).toString());
            stringBuilder.append("/n");
        }
        return stringBuilder;
    }
    //得到MAC地址
    public String GetMacAddress()
    {
        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();
    }
    //得到接入点的BSSID
    public String GetBSSID()
    {
        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();
    }
    //得到IP地址
    public int GetIPAddress()
    {
        return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();
    }
    //得到连接的ID
    public int GetNetworkId()
    {
        return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();
    }
    //得到WifiInfo的所有信息包
    public String GetWifiInfo()
    {
        return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();
    }
    //添加一个网络并连接
    public void AddNetwork(WifiConfiguration wcg)
    {
        int wcgID = mWifiManager.addNetwork(wcg);
        mWifiManager.enableNetwork(wcgID, true);
    }
    //断开指定ID的网络
    public void DisconnectWifi(int netId)
    {
        mWifiManager.disableNetwork(netId);
        mWifiManager.disconnect();
    }
}

package com.yarin.android.Examples_08_08;  
import java.util.List;  
import android.content.Context;  
import android.net.wifi.ScanResult;  
import android.net.wifi.WifiConfiguration;  
import android.net.wifi.WifiInfo;  
import android.net.wifi.WifiManager;  
import android.net.wifi.WifiManager.WifiLock;  
public class WifiAdmin  
{  
    //定义WifiManager对象   
    private WifiManager mWifiManager;  
    //定义WifiInfo对象   
    private WifiInfo mWifiInfo;  
    //扫描出的网络连接列表   
    private List<ScanResult> mWifiList;  
    //网络连接列表   
    private List<WifiConfiguration> mWifiConfiguration;  
    //定义一个WifiLock   
    WifiLock mWifiLock;  
    //构造器   
    public  WifiAdmin(Context context)  
    {  
        //取得WifiManager对象   
        mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);  
        //取得WifiInfo对象   
        mWifiInfo = mWifiManager.getConnectionInfo();  
    }  
    //打开WIFI   
    public void OpenWifi()  
    {  
        if (!mWifiManager.isWifiEnabled())  
        {  
            mWifiManager.setWifiEnabled(true);  
              
        }  
    }  
    //关闭WIFI   
    public void CloseWifi()  
    {  
        if (!mWifiManager.isWifiEnabled())  
        {  
            mWifiManager.setWifiEnabled(false);   
        }  
    }  
    //锁定WifiLock   
    public void AcquireWifiLock()  
    {  
        mWifiLock.acquire();  
    }  
    //解锁WifiLock   
    public void ReleaseWifiLock()  
    {  
        //判断时候锁定   
        if (mWifiLock.isHeld())  
        {  
            mWifiLock.release();  
        }  
    }  
    //创建一个WifiLock   
    public void CreatWifiLock()  
    {  
        mWifiLock = mWifiManager.createWifiLock("Test");  
    }  
    //得到配置好的网络   
    public List<WifiConfiguration> GetConfiguration()  
    {  
        return mWifiConfiguration;  
    }  
    //指定配置好的网络进行连接   
    public void ConnectConfiguration(int index)  
    {  
        //索引大于配置好的网络索引返回   
        if(index > mWifiConfiguration.size())  
        {  
            return;  
        }  
        //连接配置好的指定ID的网络   
        mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId, true);  
    }  
    public void StartScan()  
    {  
        mWifiManager.startScan();  
        //得到扫描结果   
        mWifiList = mWifiManager.getScanResults();  
        //得到配置好的网络连接   
        mWifiConfiguration = mWifiManager.getConfiguredNetworks();  
    }  
    //得到网络列表   
    public List<ScanResult> GetWifiList()  
    {  
        return mWifiList;  
    }  
    //查看扫描结果   
    public StringBuilder LookUpScan()  
    {  
        StringBuilder stringBuilder = new StringBuilder();  
        for (int i = 0; i < mWifiList.size(); i++)  
        {  
            stringBuilder.append("Index_"+new Integer(i + 1).toString() + ":");  
            //将ScanResult信息转换成一个字符串包   
            //其中把包括：BSSID、SSID、capabilities、frequency、level   
            stringBuilder.append((mWifiList.get(i)).toString());  
            stringBuilder.append("/n");  
        }  
        return stringBuilder;  
    }  
    //得到MAC地址   
    public String GetMacAddress()  
    {  
        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();  
    }  
    //得到接入点的BSSID   
    public String GetBSSID()  
    {  
        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();  
    }  
    //得到IP地址   
    public int GetIPAddress()  
    {  
        return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();  
    }  
    //得到连接的ID   
    public int GetNetworkId()  
    {  
        return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();  
    }  
    //得到WifiInfo的所有信息包   
    public String GetWifiInfo()  
    {  
        return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();  
    }  
    //添加一个网络并连接   
    public void AddNetwork(WifiConfiguration wcg)  
    {  
        int wcgID = mWifiManager.addNetwork(wcg);   
        mWifiManager.enableNetwork(wcgID, true);   
    }  
    //断开指定ID的网络   
    public void DisconnectWifi(int netId)  
    {  
        mWifiManager.disableNetwork(netId);  
        mWifiManager.disconnect();  
    }  
}