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Set proxy for Android Webview
package me.madeye;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.http.HttpHost;
import android.content.Context;
import android.os.Build;
import android.util.Log;
/**
* Utility class for setting WebKit proxy used by Android WebView
*
*/
public class ProxySettings {
private static final String TAG = "GAEProxy.ProxySettings";
static final int PROXY_CHANGED = 193;
private 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);
// System.out.println(obj.getClass().getName() + "." + name + " = "+
// out);
return out;
}
public static Object getRequestQueue(Context ctx) throws Exception {
Object ret = null;
Class networkClass = Class.forName("android.webkit.Network");
if (networkClass != null) {
Object networkObj = invokeMethod(networkClass, "getInstance", new Object[] { ctx },
Context.class);
if (networkObj != null) {
ret = getDeclaredField(networkObj, "mRequestQueue");
}
}
return ret;
}
private static Object invokeMethod(Object object, String methodName, Object[] params,
Class... types) throws Exception {
Object out = null;
Class c = object instanceof Class ? (Class) object : object.getClass();
if (types != null) {
Method method = c.getMethod(methodName, types);
out = method.invoke(object, params);
} else {
Method method = c.getMethod(methodName);
out = method.invoke(object);
}
// System.out.println(object.getClass().getName() + "." + methodName +
// "() = "+ out);
return out;
}
public static void resetProxy(Context ctx) throws Exception {
Object requestQueueObject = getRequestQueue(ctx);
if (requestQueueObject != null) {
setDeclaredField(requestQueueObject, "mProxyHost", null);
}
}
private static void setDeclaredField(Object obj, String name, Object value)
throws SecurityException, NoSuchFieldException, IllegalArgumentException,
IllegalAccessException {
Field f = obj.getClass().getDeclaredField(name);
f.setAccessible(true);
f.set(obj, value);
}
/**
* Override WebKit Proxy settings
*
* @param ctx
* Android ApplicationContext
* @param host
* @param port
* @return true if Proxy was successfully set
*/
public static boolean setProxy(Context ctx, String host, int port) {
boolean ret = false;
setSystemProperties(host, port);
try {
if (Build.VERSION.SDK_INT < 14) {
Object requestQueueObject = getRequestQueue(ctx);
if (requestQueueObject != null) {
// Create Proxy config object and set it into request Q
HttpHost httpHost = new HttpHost(host, port, "http");
setDeclaredField(requestQueueObject, "mProxyHost", httpHost);
ret = true;
}
} else {
ret = setICSProxy(host, port);
}
} catch (Exception e) {
Log.e(TAG, "error setting up webkit proxying", e);
}
return ret;
}
private static boolean setICSProxy(String host, int port) throws ClassNotFoundException,
NoSuchMethodException, IllegalArgumentException, InstantiationException,
IllegalAccessException, InvocationTargetException {
Class webViewCoreClass = Class.forName("android.webkit.WebViewCore");
Class proxyPropertiesClass = Class.forName("android.net.ProxyProperties");
if (webViewCoreClass != null && proxyPropertiesClass != null) {
Method m = webViewCoreClass.getDeclaredMethod("sendStaticMessage", Integer.TYPE,
Object.class);
Constructor c = proxyPropertiesClass.getConstructor(String.class, Integer.TYPE,
String.class);
m.setAccessible(true);
c.setAccessible(true);
Object properties = c.newInstance(host, port, null);
m.invoke(null, PROXY_CHANGED, properties);
return true;
}
return false;
}
private static void setSystemProperties(String host, int port) {
System.setProperty("http.proxyHost", host);
System.setProperty("http.proxyPort", port + "");
System.setProperty("https.proxyHost", host);
System.setProperty("https.proxyPort", port + "");
}
}
@mohitum007

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mohitum007 commented Dec 3, 2013

please tell me how to revert the proxy back or clear proxy for normal browsing????

@mohitum007

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mohitum007 commented Dec 3, 2013

Also when I try to use resetProxy it give me
java.lang.ClassNotFoundException: android.webkit.Network

I am running this on android 4.2

@balyanrobin

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balyanrobin commented Aug 22, 2014

Hi,
Please tell me how to use proxy for https urls, even for https urls proxy is receiving plain http request. My issue is similar to this thread - http://stackoverflow.com/questions/18377769/webview-not-able-to-load-https-url-in-android .
I want to use proxy for both http and https urls and want to set different ports for http and https.

Thanks in advance. any clue in this context would be great help.

@seyoung-hyun

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seyoung-hyun commented Jun 23, 2016

@madeye

Hi, I'm Seyoung.
I want to use your code in my commercial app.
But I can'f find any terms and conditions for use, reproduction, and distribution.
I wonder if I can use the code for commercial distribution or not.
Please let me know how I can use the code for commercial distribution.
Thanks.

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