Android Webview 以编程方式设置代理 Kitkat

问题描述

我们如何在最新的 Kitkat 版本中以编程方式在 Android webview 中设置代理?

How can we set proxy in Android webview programmatically on latest Kitkat release?

此 SO 链接 WebView android 代理 讨论了 SDK 版本 18 之前的版本.但这些解决方案不再适用与 Kitkat 一起使用，因为底层 webkit 实现已更改，现在使用铬.

This SO link WebView android proxy talks about version upto SDK version 18. But those solution no more works with Kitkat as underlying webkit implementation is changed and it uses chromium now.

推荐答案

这是我的解决方案:

public static void 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) {
        e.printStackTrace();
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (NoSuchMethodException e) {
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    } catch (InstantiationException e) {
        e.printStackTrace();
    }
}

希望能帮到你.

注意:Context 参数应该是如参数名称所示的应用程序上下文，您可以使用自己实现的应用程序实例来扩展应用程序.

Note: The Context parameter should be an Application context as the parameter name showed, you could use your own implemented Application instance which extend Application.

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