WebView 安卓代理

问题描述

我知道如何手动设置代理并在我的 WebView 中使用它.

I know how to setting proxy manually and to use it in my WebView.

设置->无线网络->移动网络->接入点名称->telkila.现在输入代理服务器地址和端口(将是 80).WebView.enablePlatformNotifications();

Settings -> Wireless Networks ->mobile networks-> access point names->telkila. Now enter the proxy server address and port (which will be 80).WebView.enablePlatformNotifications();

但是我可以通过代码设置代理设置吗?所以我的用户不必手动设置?

But can i set the proxy setting from code?So my user didn't have to set manually?

谢谢

推荐答案

没有合法的方式以编程方式更改您的 webview 代理设置.但是可以使用 java 反射来更改 android.net.http.RequestQueue 类中的 mProxyHost 值.它是私有值，没有设置器，因此反射似乎是唯一可能的变体.我在我的项目中使用了它并且它有效.这是我的方法示例:

There is no legal way to change your webview proxy settings programmatically. But it's possible to use java reflection to change mProxyHost value from android.net.http.RequestQueue class. It's private value and there is no setters for it, so reflection seems to be the only possible variant. I used it in my project and it works. Here is the sample of my method:

    private boolean setProxyHostField(HttpHost proxyServer) {
    // Getting network
    Class networkClass = null;
    Object network = null;
    try {
        networkClass = Class.forName("android.webkit.Network");
        Field networkField = networkClass.getDeclaredField("sNetwork");
        network = getFieldValueSafely(networkField, null);
    } catch (Exception ex) {
        Log.e(ProxyManager.class.getName(), "error getting network");
        return false;
    }
    if (network == null) {
        Log.e(ProxyManager.class.getName(), "error getting network : null");
        return false;
    }
    Object requestQueue = null;
    try {
        Field requestQueueField = networkClass
                .getDeclaredField("mRequestQueue");
        requestQueue = getFieldValueSafely(requestQueueField, network);
    } catch (Exception ex) {
        Log.e(ProxyManager.class.getName(), "error getting field value");
        return false;
    }
    if (requestQueue == null) {
        Log.e(ProxyManager.class.getName(), "Request queue is null");
        return false;
    }
    Field proxyHostField = null;
    try {
        Class requestQueueClass = Class.forName("android.net.http.RequestQueue");
        proxyHostField = requestQueueClass
                .getDeclaredField("mProxyHost");
    } catch (Exception ex) {
        Log.e(ProxyManager.class.getName(), "error getting proxy host field");
        return false;
    }
    synchronized (synchronizer) {
        boolean temp = proxyHostField.isAccessible();
        try {
            proxyHostField.setAccessible(true);
            proxyHostField.set(requestQueue, proxyServer);
        } catch (Exception ex) {
            Log.e(ProxyManager.class.getName(), "error setting proxy host");
        } finally {
            proxyHostField.setAccessible(temp);
        }
    }
    return true;
}

private 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;
}

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