WifiUtils wifi工具类

import java.util.ArrayList;
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;
import android.util.Log;


public class WifiUtils {
private WifiManager localWifiManager;//提供Wifi管理的各种主要API，主要包含wifi的扫描、建立连接、配置信息等
//private List<ScanResult> wifiScanList;//ScanResult用来描述已经检测出的接入点，包括接入的地址、名称、身份认证、频率、信号强度等
private List<WifiConfiguration> wifiConfigList;//WIFIConfiguration描述WIFI的链接信息，包括SSID、SSID隐藏、password等的设置
private WifiInfo wifiConnectedInfo;//已经建立好网络链接的信息
private WifiLock wifiLock;//手机锁屏后，阻止WIFI也进入睡眠状态及WIFI的关闭

public WifiUtils( Context context){
localWifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);
}

    //检查WIFI状态
public int WifiCheckState(){
return localWifiManager.getWifiState();
}

//开启WIFI
public void WifiOpen(){
if(!localWifiManager.isWifiEnabled()){
localWifiManager.setWifiEnabled(true);
}
}

//关闭WIFI
public void WifiClose(){
if(localWifiManager.isWifiEnabled()){
localWifiManager.setWifiEnabled(false);
}
}

//扫描wifi
public void WifiStartScan(){
localWifiManager.startScan();
}

//得到Scan结果
public List<ScanResult> getScanResults(){
return localWifiManager.getScanResults();//得到扫描结果
}


//Scan结果转为Sting
public List<String> scanResultToString(List<ScanResult> list){
List<String> strReturnList = new ArrayList<String>();
for(int i = 0; i < list.size(); i++){
ScanResult strScan = list.get(i);
String str = strScan.toString();
boolean bool = strReturnList.add(str);
if(!bool){
Log.i("scanResultToSting","Addfail");
}
}
return strReturnList;
}

//得到Wifi配置好的信息
public void getConfiguration(){
wifiConfigList = localWifiManager.getConfiguredNetworks();//得到配置好的网络信息
for(int i =0;i<wifiConfigList.size();i++){
Log.i("getConfiguration",wifiConfigList.get(i).SSID);
Log.i("getConfiguration",String.valueOf(wifiConfigList.get(i).networkId));
}
}
//判定指定WIFI是否已经配置好,依据WIFI的地址BSSID,返回NetId
public int IsConfiguration(String SSID){
Log.i("IsConfiguration",String.valueOf(wifiConfigList.size()));
for(int i = 0; i < wifiConfigList.size(); i++){
Log.i(wifiConfigList.get(i).SSID,String.valueOf( wifiConfigList.get(i).networkId));
if(wifiConfigList.get(i).SSID.equals(SSID)){//地址相同
return wifiConfigList.get(i).networkId;
}
}
return -1;
}


//添加指定WIFI的配置信息,原列表不存在此SSID
public int AddWifiConfig(List<ScanResult> wifiList,String ssid,String pwd){
int wifiId = -1;
for(int i = 0;i < wifiList.size(); i++){
ScanResult wifi = wifiList.get(i);
if(wifi.SSID.equals(ssid)){
Log.i("AddWifiConfig","equals");
WifiConfiguration wifiCong = new WifiConfiguration();
wifiCong.SSID = "\""+wifi.SSID+"\"";//\"转义字符，代表"
wifiCong.preSharedKey = "\""+pwd+"\"";//WPA-PSK密
wifiCong.hiddenSSID = false;
wifiCong.status = WifiConfiguration.Status.ENABLED;
wifiId = localWifiManager.addNetwork(wifiCong);//将配置好的特定WIFI密码信息添加,添加完成后默认是不激活状态，成功返回ID，否则为-1
if(wifiId != -1){
return wifiId;
}
}
}
return wifiId;
}


public int AddWifiConfig(String ssid,String pwd){
int wifiId = -1;

Log.i("AddWifiConfig","equals");
WifiConfiguration wifiCong = new WifiConfiguration();
wifiCong.SSID = "\""+ssid+"\"";//\"转义字符，代表"
wifiCong.preSharedKey = "\""+pwd+"\"";//WPA-PSK密码
wifiCong.hiddenSSID = false;
wifiCong.status = WifiConfiguration.Status.ENABLED;
wifiId = localWifiManager.addNetwork(wifiCong);//将配置好的特定WIFI密码信息添加,添加完成后默认是不激活状态，成功返回ID，否则为-1
if(wifiId != -1){
return wifiId;
}


return wifiId;
}

//连接指定Id的WIFI
public boolean ConnectWifi(int wifiId){
for(int i = 0; i < wifiConfigList.size(); i++){
WifiConfiguration wifi = wifiConfigList.get(i);
if(wifi.networkId == wifiId){
while(!(localWifiManager.enableNetwork(wifiId, true))){//激活该Id，建立连接
Log.i("ConnectWifi",String.valueOf(wifiConfigList.get(wifiId).status));//status:0--已经连接，1--不可连接，2--可以连接
}
return true;
}
}
return false;
}

//创建一个WIFILock
public void createWifiLock(String lockName){
wifiLock = localWifiManager.createWifiLock(lockName);
}

//锁定wifilock
public void acquireWifiLock(){
wifiLock.acquire();
}

//解锁WIFI
public void releaseWifiLock(){
if(wifiLock.isHeld()){//判定是否锁定
wifiLock.release();
}
}

//得到建立连接的信息
public void getConnectedInfo(){
wifiConnectedInfo = localWifiManager.getConnectionInfo();
}
//得到连接的MAC地址
public String getConnectedMacAddr(){
return (wifiConnectedInfo == null)? "NULL":wifiConnectedInfo.getMacAddress();
}

//得到连接的名称SSID
public String getConnectedSSID(){
return (wifiConnectedInfo == null)? "NULL":wifiConnectedInfo.getSSID();
}

//得到连接的IP地址
public int getConnectedIPAddr(){
return (wifiConnectedInfo == null)? 0:wifiConnectedInfo.getIpAddress();
}

//得到连接的ID
public int getConnectedID(){
return (wifiConnectedInfo == null)? 0:wifiConnectedInfo.getNetworkId();
}
}