关于android-webview设置代理访问页面

这几天在开发一个项目、关于用webview设置代理后访问页面。于是整理出来。亲测可用

package com.sh.util;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.net.Proxy;
import android.os.Build;
import android.os.Parcelable;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.Log;
import android.webkit.WebView;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.util.Properties;

public class WebViewPxoxyUtils {
    private static final String LOG_TAG = "WebviewSettingProxy";


    /**
     * 给webview设置代理
     *
     * @param webview
     * @param host                 ip
     * @param port                 端口
     * @param applicationClassName 注意这里applicationClassName 传递的是 application 的类名
     * @return
     */
    public static boolean setProxy(WebView webview, String host, int port, String applicationClassName, String userName, String pwd) {
        // ICS: 4.0
        if (Build.VERSION.SDK_INT <= 15) {
            return setProxyICS(webview, host, port);
        }
        // 4.1-4.3 (JB)
        else if (Build.VERSION.SDK_INT <= 18) {
            return setProxyJB(webview, host, port);
        }
        // 4.4 (KK) & 5.0 (Lollipop)
        else {
            return setProxyKKPlus(webview, host, port, applicationClassName,userName,pwd);
        }
    }

    /**
     * 给webview取消代理
     *
     * @param webview
     * @param applicationClassName  注意这里applicationClassName 传递的是 android.app.Application
     * @return
     */
    public static boolean revertBackProxy(WebView webview, String applicationClassName) {
        if (webview == null || TextUtils.isEmpty(applicationClassName)) {
            return true;
        }
        // 3.2 (HC) or lower
        // ICS: 4.0
        else if (Build.VERSION.SDK_INT <= 15) {
            return revertProxyICS(webview);
        }
        // 4.1-4.3 (JB)
        else if (Build.VERSION.SDK_INT <= 18) {
            return revertProxyJB(webview);
        }
        // 4.4 (KK) & 5.0 (Lollipop)
        else {
            return revertProxyKKPlus(webview, applicationClassName);
        }
    }

    /**
     * Set Proxy for Android 3.2 and below.
     */

    @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;
        }
    }

    private static boolean revertProxyICS(WebView webview) {
        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);

            Object o = null;
            updateProxyInstance.invoke(sJavaBridge, o);

            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 - 4.3.
     */
    @SuppressWarnings("all")
    private static boolean setProxyJB(WebView webview, String host, int port) {
        Log.d(LOG_TAG, "Setting proxy with 4.1 - 4.3 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 - 4.3 API successful!");
        return true;
    }

    private static boolean revertProxyJB(WebView webview) {
        Log.d(LOG_TAG, "revert proxy with 4.1 - 4.3 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);

            Object o = null;
            updateProxyInstance.invoke(sJavaBridge, o);
        } catch (Exception ex) {
            Log.e(LOG_TAG, "Setting proxy with >= 4.1 API failed with error: " + ex.getMessage());
            return false;
        }

        Log.d(LOG_TAG, "revert proxy with 4.1 - 4.3 API successful!");
        return true;
    }

    // from https://stackoverflow.com/questions/19979578/android-webview-set-proxy-programatically-kitkat
    @SuppressLint("NewApi")
    @SuppressWarnings("all")
    private static boolean setProxyKKPlus(WebView webView, String host, int port, String applicationClassName, final String userName, final String pwd) {
        Log.d(LOG_TAG, "Setting proxy with >= 4.4 API.");
        Context appContext = webView.getContext().getApplicationContext();
        System.setProperty("http.proxyHost", host);
        System.setProperty("http.proxyPort", port + "");
        System.setProperty("https.proxyHost", host);
        System.setProperty("https.proxyPort", port + "");
        Authenticator.setDefault(
                new Authenticator() {
                    @Override
                    public PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication(
                                userName, pwd.toCharArray());
                    }
                }
        );


        try {
            if (StringUtils.isNotBlank(userName) && StringUtils.isNotBlank(pwd)) {
                System.setProperty("http.proxyUser", userName);
                System.setProperty("http.proxyPassword", pwd);
                System.setProperty("https.proxyUser", userName);
                System.setProperty("https.proxyPassword", pwd);
            }
            Class applictionCls = Class.forName(applicationClassName);
            Field loadedApkField = applictionCls.getField("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);
                        final String CLASS_NAME = "android.net.ProxyInfo";
                        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);
                        onReceiveMethod.invoke(rec, appContext, intent);
                    }
                }
            }
            Log.d(LOG_TAG, "Setting proxy with >= 4.4 API successful!");
            return true;
        } catch (ClassNotFoundException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (NoSuchFieldException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (IllegalAccessException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (IllegalArgumentException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (NoSuchMethodException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (InvocationTargetException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (InstantiationException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);

        }
        return false;
    }

    @SuppressLint("NewApi")
    @SuppressWarnings("all")
    private static boolean revertProxyKKPlus(WebView webView, String applicationClassName) {
        Context appContext = webView.getContext().getApplicationContext();
        Properties properties = System.getProperties();
        properties.remove("http.proxyHost");
        properties.remove("http.proxyPort");
        properties.remove("https.proxyHost");
        properties.remove("https.proxyPort");
        properties.remove("http.proxyUser");
        properties.remove("http.proxyPassword");
        properties.remove("https.proxyUser");
        properties.remove("https.proxyPassword");
        try {
            Class applictionCls = Class.forName(applicationClassName);
            Field loadedApkField = applictionCls.getField("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);
                        final String CLASS_NAME = "android.net.ProxyInfo";
                        Class cls = Class.forName(CLASS_NAME);
                        Constructor constructor = cls.getConstructor(String.class, Integer.TYPE, String.class);
                        constructor.setAccessible(true);
                        Object proxyProperties = constructor.newInstance(null, 0, null);
                        intent.putExtra("proxy", (Parcelable) proxyProperties);
                        onReceiveMethod.invoke(rec, appContext, intent);
                    }
                }
            }
            Log.d(LOG_TAG, "revert proxy with >= 4.4 API successful!");
            return true;
        } catch (ClassNotFoundException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (NoSuchFieldException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (IllegalAccessException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (IllegalArgumentException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (NoSuchMethodException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (InvocationTargetException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);
        } catch (InstantiationException e) {
            StringWriter sw = new StringWriter();
            e.printStackTrace(new PrintWriter(sw));
            String exceptionAsString = sw.toString();
            Log.v(LOG_TAG, e.getMessage());
            Log.v(LOG_TAG, exceptionAsString);

        }
        return false;
    }

    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;
    }

    public static boolean isWifiProxy(Context context) {

        final boolean IS_ICS_OR_LATER = Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;

        String proxyAddress;

        int proxyPort;

        if (IS_ICS_OR_LATER) {

            proxyAddress = System.getProperty("http.proxyHost");

            String portStr = System.getProperty("http.proxyPort");

            proxyPort = Integer.parseInt((portStr != null ? portStr : "-1"));

        } else {

            proxyAddress = Proxy.getHost(context);

            proxyPort = Proxy.getPort(context);

        }

        return (!TextUtils.isEmpty(proxyAddress)) && (proxyPort != -1);

    }

}

判断是否使用代理的方法：
 

   public static boolean isWifiProxy(Context context) {

        final boolean IS_ICS_OR_LATER = Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;

        String proxyAddress;

        int proxyPort;

        if (IS_ICS_OR_LATER) {

            proxyAddress = System.getProperty("http.proxyHost");

            String portStr = System.getProperty("http.proxyPort");

            proxyPort = Integer.parseInt((portStr != null ? portStr : "-1"));

        } else {

            proxyAddress = android.net.Proxy.getHost(context);

            proxyPort = android.net.Proxy.getPort(context);

        }

        return (!TextUtils.isEmpty(proxyAddress)) && (proxyPort != -1);

    }

但是我发现，如果用webview设置代理，不加代理认证的话，有时候也是打不开页面的，这一块各位如果有更好的解决办法、可以一起讨论学习下