android wifi

wifi网卡的状态由一系列的整型常量来表示的:

1)、int WIFI_STATE_DISABLED Wi-Fi is disabled. Wi-Fi不可用  1

2)、int WIFI_STATE_DISABLING Wi-Fi is currently being disabled. Wi-Fi正在关闭   0

3)、int WIFI_STATE_ENABLED Wi-Fi is enabled. Wi-Fi可用    3

4)、int WIFI_STATE_ENABLING Wi-Fi is currently being enabled. Wi-Fi正在打开    2

5)、int WIFI_STATE_UNKNOWN Wi-Fi is in an unknown state.未知网卡状态  4

操作wifi所需要的权限:

允许修改网络状态的权限。

<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>

允许修改wifi 状态的权限。
<uses-permission android:name="android.permission.CHANGE_wifi_STATE"/>

允许访问网络状态的权限。
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

允许访问wifi状态的权限。
<uses-permission android:name="android.permission.ACCESS_wifi_STATE"/>

 

常用方法封装在一个类里面,要用的时候直接可以调用:

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.acquire();  
        }  
    }  
    //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();  
    }  
}  

 

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