如何控制了Android的WebView历史/后退堆栈？ [英] How to control the Android WebView history/back stack?

问题描述

我试图找出一种方法来处理的WebView回栈类似于如何在Android网页浏览器处理它时，后退按钮是从我自己的应用程序的的WebView pssed $ P $。

I am trying to figure out a way to handle the WebView back stack similar to how the Android web browser handles it when the back button is pressed from within my own app's WebView.

这个问题，是因为有的Javascript重定向。 web视图回堆栈似乎包含简单的URL重定向。这里是我的相关code：

The problem has to do with Javascript redirects. The WebView back stack appears to contain URLs that simply redirect. Here is my relevant code:

private class ArticleWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK)
    {
        WebView wv = (WebView)findViewById(R.id.web);
        if (wv.canGoBack())
        {
            wv.goBack();

            return true;
        }
    }

    return super.onKeyDown(keyCode, event);
}

正如你所看到的，pressing后退按钮选择previous URL在堆栈中，shouldOverrideUrlLoading之后，在加载web视图本身（）被调用。我其实在做内部shouldOverrideUrlLoading多很多（），它是不相关的这个特殊的问题，所以删除我的WebViewClient实施会不会为我工作。无论如何，当previous URL是一个Javascript重定向，该网址的负载，然后立即使用Javascript重定向到web视图只是在URL。我不能禁用Javascript的，因为网站依赖于它。我也不能更改网站（第三方）。

As you can see, pressing the back button selects the previous URL in the stack, which loads in the WebView itself after shouldOverrideUrlLoading() is called. I'm actually doing a lot more inside shouldOverrideUrlLoading() that isn't relevant for this particular question, so "remove my WebViewClient implementation" won't work for me. At any rate, when the previous URL is a Javascript redirect, that URL loads and then Javascript immediately redirects to the URL the WebView was just at. I can't disable Javascript because the website depends on it. I also can't change the website (third-party).

这个重定向问题，其结果是恶性循环的最终用户是谁疯狂pressing回只想比Android的网页处理引擎，速度稍快。

The result of this redirection issue is a vicious cycle for the end-user who is frantically pressing back just to be slightly faster than the Android webpage processing engine.

现在这里就是它变得有趣：Android的网页浏览器处理后退按钮就好了Javascript的重定向！它遵循重定向得很好，但后面的按钮的功能，用户希望它做的事。这意味着有可能正确地处理这种情况。如何在Android网页浏览器处理这个问题？

Now here is where it gets interesting: The Android web browser handles the back button just fine for Javascript redirects! It follows the redirects just fine but the back button does what a user expects it to do. That means it is possible to correctly handle this scenario. How does the Android web browser handle this problem?

推荐答案

我也有类似的问题，你发现如何弄明白。这里是我的回答。

I had a similar problem with yours and found how to figure it out. Here is my answer.

当我点击一个链接（www.new.a），它会自动重定向其他链接（mobile.new.a）。通常情况下，链接重定向两个或三个，和我的解决方案已经制定上几乎每​​一个重定向的链接。我希望这个答案帮助您与annyoing重定向连接。

When I click the first link(www.new.a) it automatically redirects other link(mobile.new.a). Usually the links redirect two or three, and my solution have been worked on almost every redirect links. I hope this answer help you out with annyoing redirecting links.

我终于想通了这一点。你需要有四个API的WebViewClient。有shouldOverrideUrlLoading（），onPageStarted（），onPageFinished（），和doUpdateVisitedHistory（）中的WebViewClient。您需要的所有的API是API 1，因此不用担心。

I finally figured out that. You need a WebViewClient with four APIs. There are shouldOverrideUrlLoading(), onPageStarted(), onPageFinished(), and doUpdateVisitedHistory() in the WebViewClient. All the APIs you need is API 1 so don't worry about.

下面是我的回答。检查出的！ ：）

Here is my answer. Check out that! :)

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