WifiAdmin.java

package com.yimu.dlutlogin;

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;


/**
 * wifi操作类
 * @author Administrator
 *
 */
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 = null;
	// 已配置好的网络连接列表
	private List<WifiConfiguration> mWifiConfiguration;
	// 定义一个WifiLock
	WifiLock mWifiLock;

	// 定义几种加密方式，一种是WEP，一种是WPA，还有没有密码的情况
	public enum WifiCipherType {
		WIFICIPHER_WEP, WIFICIPHER_WPA, WIFICIPHER_NOPASS, WIFICIPHER_INVALID
	}

	

	// 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 boolean openWifi() {
		boolean bRet = true;
		if (!mWifiManager.isWifiEnabled()) {
			bRet = mWifiManager.setWifiEnabled(true);
			while (mWifiManager.getWifiState() == WifiManager.WIFI_STATE_ENABLING) {
				try {
					// 为了避免程序一直while循环，让它睡个100毫秒在检测……
					Thread.currentThread();
					Thread.sleep(100);
				} catch (InterruptedException ie) {
				}
			}
		}
		return bRet;
	}

	// 关闭WIFI
	public void closeWifi() {
		if (mWifiManager.isWifiEnabled()) {
			mWifiManager.setWifiEnabled(false);
		}
	}

	// 检查当前WIFI状态
	public int checkState() {
		return mWifiManager.getWifiState();
	}

	// 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();
		//openWifi();
		startScan();
		System.out.println("wifi length="+mWifiList.size());
		
		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SSID
	public String getSSID() {
		
		mWifiInfo = mWifiManager.getConnectionInfo();
		if(mWifiInfo == null || mWifiInfo.getSSID() == null){
			Log.i("WifiAdmin", "ssid null");
            return "NULL";
		}
		return mWifiInfo.getSSID();
	}

	// 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);
		boolean b = mWifiManager.enableNetwork(wcgID, true);

	}

	// 断开指定ID的网络
	public void disconnectWifi(int netId) {
		mWifiManager.disableNetwork(netId);
		mWifiManager.disconnect();
	}

	// 提供一个外部接口，传入要连接的无线网
	public boolean Connect(String SSID, String Password, WifiCipherType Type) {
		if (!this.openWifi()) {
			return false;
		}
		// 开启wifi功能需要一段时间(我在手机上测试一般需要1-3秒左右)，所以要等到wifi
		// 状态变成WIFI_STATE_ENABLED的时候才能执行下面的语句
		while (mWifiManager.getWifiState() == WifiManager.WIFI_STATE_ENABLING) {
			try {
				// 为了避免程序一直while循环，让它睡个100毫秒在检测……
				Thread.currentThread();
				Thread.sleep(100);
			} catch (InterruptedException ie) {
			}
		}

		WifiConfiguration wifiConfig = this
				.CreateWifiInfo(SSID, Password, Type); // 创建wifi链接信息Configuration

		if (wifiConfig == null) {

			return false;
		}

		WifiConfiguration tempConfig = this.IsExsits(SSID); // 判断wifi信息在列表中是存在

		if (tempConfig != null) {
			mWifiManager.removeNetwork(tempConfig.networkId);
		}

		int netID = mWifiManager.addNetwork(wifiConfig);
		boolean bRet = mWifiManager.enableNetwork(netID, false);
		return bRet;
	}

	// 查看以前是否也配置过这个网络
	private WifiConfiguration IsExsits(String SSID) {
		List<WifiConfiguration> existingConfigs = mWifiManager
				.getConfiguredNetworks();
		for (WifiConfiguration existingConfig : existingConfigs) {
			if (existingConfig.SSID.equals("\"" + SSID + "\"")) {
				return existingConfig;
			}
		}
		return null;
	}

	private WifiConfiguration CreateWifiInfo(String SSID, String Password,
			WifiCipherType Type) {
		WifiConfiguration config = new WifiConfiguration();
		config.allowedAuthAlgorithms.clear();
		config.allowedGroupCiphers.clear();
		config.allowedKeyManagement.clear();
		config.allowedPairwiseCiphers.clear();
		config.allowedProtocols.clear();
		config.SSID = "\"" + SSID + "\"";

		if (Type == WifiCipherType.WIFICIPHER_NOPASS) {
			config.wepKeys[0] = "";
			config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
			config.wepTxKeyIndex = 0;
		} else if (Type == WifiCipherType.WIFICIPHER_WEP) {
			config.preSharedKey = "\"" + Password + "\"";
			config.hiddenSSID = true;
			config.allowedAuthAlgorithms
					.set(WifiConfiguration.AuthAlgorithm.SHARED);
			config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
			config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
			config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
			config.allowedGroupCiphers
					.set(WifiConfiguration.GroupCipher.WEP104);
			config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
			config.wepTxKeyIndex = 0;
		} else if (Type == WifiCipherType.WIFICIPHER_WPA) {
			config.preSharedKey = "\"" + Password + "\"";
			config.hiddenSSID = true;
			config.allowedAuthAlgorithms
					.set(WifiConfiguration.AuthAlgorithm.OPEN);
			config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
			config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
			config.allowedPairwiseCiphers
					.set(WifiConfiguration.PairwiseCipher.TKIP);
			config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
			config.status = WifiConfiguration.Status.ENABLED;
		} else {
			Log.i("tag", "no type");
			return null;
		}

		//Log.i("tag", config.toString());
		return config;
	}

	public boolean isCanScan(String str_compSSID) {
		// TODO Auto-generated method stub
		startScan();
		if(mWifiList != null){
			for(ScanResult re: mWifiList){
				if(re.SSID.equalsIgnoreCase(str_compSSID)){
					return true;
				}
			}
		}
		else{
			Log.i("test", "mWifiList is null");
		}
		
		return false;
	}

}