android - 代理设置在 Android 系统 Webview 的最后一次更新后停止工作

Question

在 Android 系统 Webview 的最后一次更新(2018 年 5 月 30 日)之后，代理设置对我停止工作，代理不再适用于 webview。在其他带代理的浏览器中也是一样的效果，代理不设置，被屏蔽的网站打不开，ip不变。返回的错误是主机不是解析器或连接失败。我的设备是 Nexus 5X，Android 8.1.0。还有其他人遇到同样的问题吗？

我用它来设置代理:

private static boolean setProxyKKPlus(WebView webView, String host, int port, String applicationClassName) {
        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 + "");
        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("android.intent.action.PROXY_CHANGE");

                        onReceiveMethod.invoke(rec, appContext, intent);
                    }
                }
            }

            Log.d(LOG_TAG, "Setting proxy with >= 4.4 API successful!");
            return true;
        } catch (Exception 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;
    }

Answer 1

此代码适用于我的环境(Chrome 67 + Android 7.0)

for (Object receiverMap : receivers.values()) {
    for (Object rec : ((ArrayMap) receiverMap).keySet()) {
        Class clazz = rec.getClass();

        boolean targetReceiverFound = false;
        if (clazz.getName().contains("ProxyChangeListener")) {
            targetReceiverFound = true;
        } else {
            final Field[] obfuscatedFields = clazz.getDeclaredFields();
            for (Field f : obfuscatedFields) {
                if (f.getType().getName().contains("ProxyChangeListener")) {
                    targetReceiverFound = true;
                    break;
                }
            }
        }

        if (targetReceiverFound) {
            // invoke onReceive() here
        }
    }
}