android 程序连接指定wifi

定义WifiConnect类

package com.example.wifimanager;

import java.util.List;

import android.net.wifi.WifiConfiguration;

import android.net.wifi.WifiManager;

import android.util.Log;

public class WifiConnect {

WifiManager wifiManager;

//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

}

//构造函数

public WifiConnect(WifiManager wifiManager)

{

this.wifiManager = wifiManager;

}

//打开wifi功能

private boolean OpenWifi()

{

boolean bRet = true;

if (!wifiManager.isWifiEnabled())

{

bRet = wifiManager.setWifiEnabled(true);

}

return bRet;

}

//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(wifiManager.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(10);

}

catch(InterruptedException ie){

}

}

WifiConfiguration wifiConfig = this.CreateWifiInfo(SSID, Password, Type);

//

if(wifiConfig == null)

{

return false;

}

WifiConfiguration tempConfig = this.IsExsits(SSID);

if(tempConfig != null)

{

wifiManager.removeNetwork(tempConfig.networkId);

}

int netID = wifiManager.addNetwork(wifiConfig);

boolean bRet =false;

bRet= wifiManager.enableNetwork(netID, true);

//wifiManager.disconnect();

wifiManager.reconnect();

return bRet;

}

//查看以前是否也配置过这个网络

private WifiConfiguration IsExsits(String SSID)

{

List<WifiConfiguration> existingConfigs = wifiManager.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;

}

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;

}

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.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);

config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);

config.status = WifiConfiguration.Status.ENABLED;

}

else

{

return null;

}

return config;

}

}

调用WifiConnect

wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);

WifiConnect wc=new WifiConnect(wifiManager);

boolean flage=wc.Connect("TP-LINK_318", "201331804", WifiCipherType.WIFICIPHER_WPA);

在manifest.xml中加入

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

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

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

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

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

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

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

<uses-feature android:name="android.hardware.wifi" />