How can I set ProxySettings and ProxyProperties on Android Wi-Fi connection using Java?

Question

How can I set ProxySettings and ProxyProperties on an Android Wi-Fi connection using Java (programatically)?

As ipAssignment, linkProperties, ProxySettings and Proxy

Answer 1

Similar to Dave's answer, but fewer lines by using only the method setProxy(ProxySettings settings, ProxyInfo proxy) (surrounding code omitted for clarity):

Class proxySettings = Class.forName("android.net.IpConfiguration$ProxySettings");

Class[] setProxyParams = new Class[2];
setProxyParams[0] = proxySettings;
setProxyParams[1] = ProxyInfo.class;

Method setProxy = config.getClass().getDeclaredMethod("setProxy", setProxyParams);
setProxy.setAccessible(true);

ProxyInfo desiredProxy = ProxyInfo.buildDirectProxy(YOUR_HOST, YOUR_PORT);

Object[] methodParams = new Object[2];
methodParams[0] = Enum.valueOf(proxySettings, "STATIC");
methodParams[1] = desiredProxy;

setProxy.invoke(config, methodParams);

Answer 2

Here is some sample code to handle the same thing in Android 5.0 following the same format as Carl's answer above.

public void setWifiProxySettings5()
{
    //get the current wifi configuration
    WifiManager manager = (WifiManager)getSystemService(Context.WIFI_SERVICE);
    WifiConfiguration config = GetCurrentWifiConfiguration(manager);
    if(null == config)
        return;     

    try
    {       
        //linkProperties is no longer in WifiConfiguration          
        Class proxyInfoClass = Class.forName("android.net.ProxyInfo");
        Class[] setHttpProxyParams = new Class[1];
        setHttpProxyParams[0] = proxyInfoClass;         
        Class wifiConfigClass = Class.forName("android.net.wifi.WifiConfiguration");
        Method setHttpProxy = wifiConfigClass.getDeclaredMethod("setHttpProxy", setHttpProxyParams);
        setHttpProxy.setAccessible(true);

        //Method 1 to get the ENUM ProxySettings in IpConfiguration
        Class ipConfigClass = Class.forName("android.net.IpConfiguration");
        Field f = ipConfigClass.getField("proxySettings");
        Class proxySettingsClass = f.getType();        

        //Method 2 to get the ENUM ProxySettings in IpConfiguration
        //Note the $ between the class and ENUM
        //Class proxySettingsClass = Class.forName("android.net.IpConfiguration$ProxySettings");

        Class[] setProxySettingsParams = new Class[1];
        setProxySettingsParams[0] = proxySettingsClass;
        Method setProxySettings = wifiConfigClass.getDeclaredMethod("setProxySettings", setProxySettingsParams);
        setProxySettings.setAccessible(true);


        ProxyInfo pi = ProxyInfo.buildDirectProxy("127.0.0.1", 8118);
        //Android 5 supports a PAC file
        //ENUM value is "PAC"
        //ProxyInfo pacInfo = ProxyInfo.buildPacProxy(Uri.parse("http://localhost/pac"));

        //pass the new object to setHttpProxy
        Object[] params_SetHttpProxy = new Object[1];
        params_SetHttpProxy[0] = pi;
        setHttpProxy.invoke(config, params_SetHttpProxy);

        //pass the enum to setProxySettings
        Object[] params_setProxySettings = new Object[1];
        params_setProxySettings[0] = Enum.valueOf((Class<Enum>) proxySettingsClass, "STATIC");
        setProxySettings.invoke(config, params_setProxySettings);

        //save the settings
        manager.updateNetwork(config);
        manager.disconnect();
        manager.reconnect();
    }   
    catch(Exception e)
    {
        Log.v("wifiProxy", e.toString());
    }
}

Answer 3

Here's some code that should allow you to set/unset ProxyProperties. It uses some of the same code from the link above. The settings do not seem to take effect with the disconnect/reconnect.

public static Object getField(Object obj, String name)
throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException{
    Field f = obj.getClass().getField(name);
    Object out = f.get(obj);
    return out;
}

public static Object getDeclaredField(Object obj, String name)
throws SecurityException, NoSuchFieldException,
IllegalArgumentException, IllegalAccessException {
    Field f = obj.getClass().getDeclaredField(name);
    f.setAccessible(true);
    Object out = f.get(obj);
    return out;
}  

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<Enum>) f.getType(), value));
}

public static void setProxySettings(String assign , WifiConfiguration wifiConf)
throws SecurityException, IllegalArgumentException, NoSuchFieldException, IllegalAccessException{
    setEnumField(wifiConf, assign, "proxySettings");     
}


WifiConfiguration GetCurrentWifiConfiguration(WifiManager manager)
{
    if (!manager.isWifiEnabled()) 
        return null;

    List<WifiConfiguration> configurationList = manager.getConfiguredNetworks();
    WifiConfiguration configuration = null;
    int cur = manager.getConnectionInfo().getNetworkId();
    for (int i = 0; i < configurationList.size(); ++i)
    {
        WifiConfiguration wifiConfiguration = configurationList.get(i);
        if (wifiConfiguration.networkId == cur)
            configuration = wifiConfiguration;
    }

    return configuration;
}

void setWifiProxySettings()
{
    //get the current wifi configuration
    WifiManager manager = (WifiManager)getSystemService(Context.WIFI_SERVICE);
    WifiConfiguration config = GetCurrentWifiConfiguration(manager);
    if(null == config)
        return;

    try
    {
        //get the link properties from the wifi configuration
        Object linkProperties = getField(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);

        //get ProxyProperties constructor
        Class[] proxyPropertiesCtorParamTypes = new Class[3];
        proxyPropertiesCtorParamTypes[0] = String.class;
        proxyPropertiesCtorParamTypes[1] = int.class;
        proxyPropertiesCtorParamTypes[2] = String.class;

        Constructor proxyPropertiesCtor = proxyPropertiesClass.getConstructor(proxyPropertiesCtorParamTypes);

        //create the parameters for the constructor
        Object[] proxyPropertiesCtorParams = new Object[3];
        proxyPropertiesCtorParams[0] = "127.0.0.1";
        proxyPropertiesCtorParams[1] = 8118;
        proxyPropertiesCtorParams[2] = null;

        //create a new object using the params
        Object proxySettings = proxyPropertiesCtor.newInstance(proxyPropertiesCtorParams);

        //pass the new object to setHttpProxy
        Object[] params = new Object[1];
        params[0] = proxySettings;
        setHttpProxy.invoke(linkProperties, params);

        setProxySettings("STATIC", config);

        //save the settings
        manager.updateNetwork(config);
        manager.disconnect();
        manager.reconnect();
    }   
    catch(Exception e)
    {
    }
}
void unsetWifiProxySettings()
{
    WifiManager manager = (WifiManager)getSystemService(Context.WIFI_SERVICE);
    WifiConfiguration config = GetCurrentWifiConfiguration(manager);
    if(null == config)
        return;

    try
    {
        //get the link properties from the wifi configuration
        Object linkProperties = getField(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);

        setProxySettings("NONE", config);

        //save the config
        manager.updateNetwork(config);
        manager.disconnect();
        manager.reconnect();
    }   
    catch(Exception e)
    {
    }
}