android 使用代码，自动设置代理IP

1. 此例子以Android 4.2.2,  API 17为基础。

2. 后面 Android 5.0.1,  API 21 设置又不一样。

 

// 设置公共成员常量值 

public static void setEnumField(Object obj, String value, String name)throws SecurityException, NoSuchFieldException,IllegalArgumentException, IllegalAccessException{ 

  Field f = obj.getClass().getField(name); 

f.set(obj, Enum.valueOf((Class) f.getType(), value)); 

 }

 

// getField只能获取类的public 字段.

public static Object getFieldObject(Object obj, String name)throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException{ 

Field f =  obj.getClass().getField(name); 

Object out = f.get(obj); return out; 

}

 

// 获取当前的Wifi连接

public static WifiConfiguration getCurrentWifiConfiguration(WifiManager wifiManager) {

if (!wifiManager.isWifiEnabled())

return null;

List configurationList = wifiManager.getConfiguredNetworks();

WifiConfiguration configuration = null;

int cur = wifiManager.getConnectionInfo().getNetworkId();

for (int i = 0; i < configurationList.size(); ++i) {

WifiConfiguration wifiConfiguration = configurationList.get(i);

if (wifiConfiguration.networkId == cur)

configuration = wifiConfiguration;

}

return configuration;

}

 

// API 17 可以用

// 其它可以用的版本需要再测试和处理

// @exclList 那些不走代理， 没有传null,多个数据以逗号隔开

public static void setWifiProxySettingsFor17And(Context context, String host, int port, String exclList) { 

WifiManager wifiManager =(WifiManager)context.getSystemService(Context.WIFI_SERVICE);WifiConfiguration config; 

  config = getCurrentWifiConfiguration(wifiManager); 

  if(config == null)return; 

  try { 

//get the link properties from the wifi configuration 

Object linkProperties = getFieldObject(config, "linkProperties"); 

if(null == linkProperties) return; 

 

//获取类 LinkProperties的setHttpProxy方法 

Class proxyPropertiesClass = Class.forName("android.net.ProxyProperties"); Class[] setHttpProxyParams = new Class[1]; 

 setHttpProxyParams[0] = proxyPropertiesClass; 

  Class lpClass = Class.forName("android.net.LinkProperties"); 

  Method setHttpProxy = lpClass.getDeclaredMethod("setHttpProxy",setHttpProxyParams);setHttpProxy.setAccessible(true); 

 

  // 获取类 ProxyProperties的构造函数 

  Constructor proxyPropertiesCtor = proxyPropertiesClass.getConstructor(String.class,int.class, String.class); 

  // 实例化类ProxyProperties Object proxySettings =proxyPropertiesCtor.newInstance(host, port, exclList); 

 

  //pass the new object to setHttpProxy 

  Object[] params = new Object[1]; 

params[0] = proxySettings; 

  setHttpProxy.invoke(linkProperties, params); 

setEnumField(config, "STATIC", "proxySettings"); 

 

  //save the settings 

wifiManager.updateNetwork(config); 

  wifiManager.disconnect(); 

wifiManager.reconnect(); 

 } catch(Exception e) { } 

 }

// 取消代理设置

public static void unsetWifiProxySettingsFor17And(Context context) { 

  WifiManager wifiManager =(WifiManager)context.getSystemService(Context.WIFI_SERVICE);WifiConfiguration config; config = getCurrentWifiConfiguration(wifiManager); 

  if(null == config) return; 

 

  try {

  //get the link properties from the wifi configuration 

  Object linkProperties = getFieldObject(config, "linkProperties"); 

  if(null == linkProperties)return; 

//get the setHttpProxy method for LinkProperties 

  Class proxyPropertiesClass = Class.forName("android.net.ProxyProperties"); Class[] setHttpProxyParams = new Class[1]; 

setHttpProxyParams[0] = proxyPropertiesClass; 

  Class lpClass = Class.forName("android.net.LinkProperties"); 

  Method setHttpProxy = lpClass.getDeclaredMethod("setHttpProxy",setHttpProxyParams);setHttpProxy.setAccessible(true); 

 

//pass null as the proxy 

  Object[] params = new Object[1]; 

  params[0] = null; 

setHttpProxy.invoke(linkProperties, params); 

  setEnumField(config, "NONE", "proxySettings"); 

 

//save the config 

wifiManager.updateNetwork(config); 

  wifiManager.disconnect(); 

wifiManager.reconnect(); 

} catch(Exception e) { 

} 

 }

 

 

// 如何调用上面的函数呢？下面示例：

// 调用设置代理：

setWifiProxySettingsFor17And(this, "192.168.1.142", 8888, null);

// 调用取消代理：

unsetWifiProxySettingsFor17And(this);