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(); } }