使用Android浏览器 - 检测页面变化 [英] Using Android Browser - Detecting page change

问题描述

我有打开的浏览器到用户指定网址的应用程序。这应该指向一个没有认证一定的登录页面。是否有可能发现当用户点击登录进入会员页面，我以后可以用于解析HTML源代码？我只是在寻找某种页变化检测。

I have an app that opens up the browser to a user given url. This should point to a certain login page that has no authentication. Is it possible to detect when the user clicks login to go to the member page that I can later parse for the HTML source? I'm just looking for some kind of on page change detection.

编辑：我现在用的WebView。这里是新的WebView活动课的一部分，迄今：

I am now using WebView. Here's part of the new WebView activity class so far:

    mWebView = (WebView) findViewById(R.id.webview);
    mWebView.getSettings().setJavaScriptEnabled(true);
    mWebView.loadUrl("theurl(removed)"); // Removed url for StackOverflow
    mWebView.loadUrl("javascript:document.getElementById('sid').value = 'name';"); // Supposed to autofill a particular input with id 'sid'

试图在页面上输入的第一个变化值，都无济于事。

Trying to first change value of an input on the page, to no avail.

推荐答案

首先，你应该打开URL您的应用程序内，只需使用的WebView使用自定义WebViewClient：

First, you should open the url inside your app, simply by using a WebView with a custom WebViewClient:

WebView myWebView = (WebView) findViewById(R.id.mywebview);
CustomWebViewClient webViewClient = new CustomWebViewClient();
myWebView.setWebViewClient(webViewClient);

您用它打开你的网址：

myWebView.loadUrl("http://myurl.com");


  private class CustomWebViewClient extends WebViewClient { 

    @Override
    /**
     * I assume the url changes when the user clicks login, so parse the url and do the right stuff
     * I look for a fictitious sessionkey here
     */
    public void onLoadResource(WebView view, String url) {
        try {
            String sessionKey = URLDecoder.decode(view.getUrl().split("session_key=")[1], "UTF-8");
            if ( sessionKey == 1337)
                {
                ...
                }                           
            }
        catch (Exception e) {
            e.printStackTrace();
        }
        super.onLoadResource(view, url);
    }

    @Override
    /**
     * Take control over the loaded url so the url is open in the current Webview and not with the default browser of Android
     */
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return false;
    }
}

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