Android examples for User Interface:WebView
Helper method to set the proxy to a android.webkit.WebView
/*// w ww. jav a 2s. c o m * Copyright (C) 2013 Daniel Velazco * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ //package com.java2s; import android.content.Context; import android.content.Intent; import android.net.Proxy; import android.os.Build; import android.os.Parcelable; import android.util.ArrayMap; import android.util.Log; import android.webkit.WebView; import java.lang.reflect.Constructor; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; public class Main { private static final String LOG_TAG = "WebViewProxyUtil"; /** * Helper method to set the proxy to a {@link android.webkit.WebView} * * @param context {@link Context} * @param webview {@link android.webkit.WebView} * @param host {@link String} * @param port {@link int} * * @return {@link boolean} */ public static boolean setProxy(Context context, WebView webview, String host, int port) { // ICS: 4.0.3 if (Build.VERSION.SDK_INT <= 15) { return setProxyICS(webview, host, port); } // 4.1 or higher (JB) else if (Build.VERSION.SDK_INT <= 18) { return setProxyJBPlus(webview, host, port); } // 4.4 or higher (KK) else { return setKitKatWebViewProxy(context, host, port); } } /** * Set Proxy for Android 4.0.3 and above. */ @SuppressWarnings("all") private static boolean setProxyICS(WebView webview, String host, int port) { try { Log.d(LOG_TAG, "Setting proxy with 4.0 API."); Class jwcjb = Class .forName("android.webkit.JWebCoreJavaBridge"); Class params[] = new Class[1]; params[0] = Class.forName("android.net.ProxyProperties"); Method updateProxyInstance = jwcjb.getDeclaredMethod( "updateProxy", params); Class wv = Class.forName("android.webkit.WebView"); Field mWebViewCoreField = wv.getDeclaredField("mWebViewCore"); Object mWebViewCoreFieldInstance = getFieldValueSafely( mWebViewCoreField, webview); Class wvc = Class.forName("android.webkit.WebViewCore"); Field mBrowserFrameField = wvc .getDeclaredField("mBrowserFrame"); Object mBrowserFrame = getFieldValueSafely(mBrowserFrameField, mWebViewCoreFieldInstance); Class bf = Class.forName("android.webkit.BrowserFrame"); Field sJavaBridgeField = bf.getDeclaredField("sJavaBridge"); Object sJavaBridge = getFieldValueSafely(sJavaBridgeField, mBrowserFrame); Class ppclass = Class.forName("android.net.ProxyProperties"); Class pparams[] = new Class[3]; pparams[0] = String.class; pparams[1] = int.class; pparams[2] = String.class; Constructor ppcont = ppclass.getConstructor(pparams); updateProxyInstance.invoke(sJavaBridge, ppcont.newInstance(host, port, null)); Log.d(LOG_TAG, "Setting proxy with 4.0 API successful!"); return true; } catch (Exception ex) { Log.e(LOG_TAG, "failed to set HTTP proxy: " + ex); return false; } } /** * Set Proxy for Android 4.1 and above. */ @SuppressWarnings("all") private static boolean setProxyJBPlus(WebView webview, String host, int port) { Log.d(LOG_TAG, "Setting proxy with >= 4.1 API."); try { Class wvcClass = Class.forName("android.webkit.WebViewClassic"); Class wvParams[] = new Class[1]; wvParams[0] = Class.forName("android.webkit.WebView"); Method fromWebView = wvcClass.getDeclaredMethod("fromWebView", wvParams); Object webViewClassic = fromWebView.invoke(null, webview); Class wv = Class.forName("android.webkit.WebViewClassic"); Field mWebViewCoreField = wv.getDeclaredField("mWebViewCore"); Object mWebViewCoreFieldInstance = getFieldValueSafely( mWebViewCoreField, webViewClassic); Class wvc = Class.forName("android.webkit.WebViewCore"); Field mBrowserFrameField = wvc .getDeclaredField("mBrowserFrame"); Object mBrowserFrame = getFieldValueSafely(mBrowserFrameField, mWebViewCoreFieldInstance); Class bf = Class.forName("android.webkit.BrowserFrame"); Field sJavaBridgeField = bf.getDeclaredField("sJavaBridge"); Object sJavaBridge = getFieldValueSafely(sJavaBridgeField, mBrowserFrame); Class ppclass = Class.forName("android.net.ProxyProperties"); Class pparams[] = new Class[3]; pparams[0] = String.class; pparams[1] = int.class; pparams[2] = String.class; Constructor ppcont = ppclass.getConstructor(pparams); Class jwcjb = Class .forName("android.webkit.JWebCoreJavaBridge"); Class params[] = new Class[1]; params[0] = Class.forName("android.net.ProxyProperties"); Method updateProxyInstance = jwcjb.getDeclaredMethod( "updateProxy", params); updateProxyInstance.invoke(sJavaBridge, ppcont.newInstance(host, port, null)); } catch (Exception ex) { Log.e(LOG_TAG, "Setting proxy with >= 4.1 API failed with error: " + ex.getMessage()); return false; } Log.d(LOG_TAG, "Setting proxy with >= 4.1 API successful!"); return true; } /** * Set Proxy for Android 4.4 and above. */ @SuppressWarnings("all") private static boolean setKitKatWebViewProxy(Context appContext, String host, int port) { System.setProperty("http.proxyHost", host); System.setProperty("http.proxyPort", port + ""); System.setProperty("https.proxyHost", host); System.setProperty("https.proxyPort", port + ""); try { Class applictionCls = Class.forName("android.app.Application"); Field loadedApkField = applictionCls .getDeclaredField("mLoadedApk"); loadedApkField.setAccessible(true); Object loadedApk = loadedApkField.get(appContext); Class loadedApkCls = Class.forName("android.app.LoadedApk"); Field receiversField = loadedApkCls .getDeclaredField("mReceivers"); receiversField.setAccessible(true); ArrayMap receivers = (ArrayMap) receiversField.get(loadedApk); for (Object receiverMap : receivers.values()) { for (Object rec : ((ArrayMap) receiverMap).keySet()) { Class clazz = rec.getClass(); if (clazz.getName().contains("ProxyChangeListener")) { Method onReceiveMethod = clazz.getDeclaredMethod( "onReceive", Context.class, Intent.class); Intent intent = new Intent( Proxy.PROXY_CHANGE_ACTION); /*********** optional, may be need in future *************/ final String CLASS_NAME = "android.net.ProxyProperties"; Class cls = Class.forName(CLASS_NAME); Constructor constructor = cls.getConstructor( String.class, Integer.TYPE, String.class); constructor.setAccessible(true); Object proxyProperties = constructor.newInstance( host, port, null); intent.putExtra("proxy", (Parcelable) proxyProperties); /*********** optional, may be need in future *************/ onReceiveMethod.invoke(rec, appContext, intent); } } } } catch (ClassNotFoundException e) { Log.e(LOG_TAG, "Setting proxy with >= 4.4 API failed with error: " + e.getMessage()); return false; } catch (NoSuchFieldException e) { Log.e(LOG_TAG, "Setting proxy with >= 4.4 API failed with error: " + e.getMessage()); return false; } catch (IllegalAccessException e) { Log.e(LOG_TAG, "Setting proxy with >= 4.4 API failed with error: " + e.getMessage()); return false; } catch (IllegalArgumentException e) { Log.e(LOG_TAG, "Setting proxy with >= 4.4 API failed with error: " + e.getMessage()); return false; } catch (NoSuchMethodException e) { Log.e(LOG_TAG, "Setting proxy with >= 4.4 API failed with error: " + e.getMessage()); return false; } catch (InvocationTargetException e) { Log.e(LOG_TAG, "Setting proxy with >= 4.4 API failed with error: " + e.getMessage()); return false; } catch (InstantiationException e) { Log.e(LOG_TAG, "Setting proxy with >= 4.4 API failed with error: " + e.getMessage()); return false; } Log.d(LOG_TAG, "Setting proxy with >= 4.4 API successful!"); return true; } private static Object getFieldValueSafely(Field field, Object classInstance) throws IllegalArgumentException, IllegalAccessException { boolean oldAccessibleValue = field.isAccessible(); field.setAccessible(true); Object result = field.get(classInstance); field.setAccessible(oldAccessibleValue); return result; } }