阻止Android WebView尝试加载/捕获资源，如loadData（）上的CSS

问题描述

背景

这似乎与许多其他问题是重复的。相信我，它不是。

我试图加载HTML数据到，能够捕获用户超链接请求。在这个过程中，我发现了，它完全符合我想要做的事情，除了捕获其他请求CSS文件和图片：

  //当网址即将加载
时，您告诉您要捕获的webclient @Override 
 public boolean shouldOverrideUrlLoading（WebView view，WebResourceRequest request）{
 return true; 
} 
 //在这里你执行一个动作，当你想要的URL加载时
 @Override 
 public void onLoadResource（WebView view，String url）{
 if（url.equals（http://cnn.com））{
 //做任何你想做的事
} 
} 
  

我已经关闭了自动图片加载，网络加载和Javascript执行：

  settings.setBlockNetworkLoads（真）; 
 settings.setBlockNetworkImage（true）; 
 settings.setJavaScriptEnabled（false）; 
  

但是这些操作并没有阻止捕获这些请求。

也许有不同的过程来捕获链接点击，但是这或者是停止加载外部资源。

问题 h2>

如何防止 WebView 捕获（或尝试加载）CSS，JS或图像等资源请求？

否则，如果我无法阻止捕获或尝试加载，我该如何区分点击的链接和网络资源？

解决方案

我找到了一种忽略自动化WebView资源请求的方法。
$ b

通过在第一次WebView初始化时忽略请求，我可以将其他用户的点击隔离开来：

  final Long time = System.currentTimeMillis（）/ 1000; 
 
 //载入一个WebView，定义一个WebViewClient捕获链接，单击
 WebView webview = new WebView（this）; 
 WebViewClient webviewClient = new WebViewClient（）{
 @Override 
 public boolean shouldOverrideUrlLoading（WebView view，WebResourceRequest request）{
 return true; 
 
 $ b @Override 
 public void onLoadResource（WebView view，String url）{
 Long currentTime = System.currentTimeMillis（）/ 1000; 
 if（currentTime  -  time> 1）{
 // do stuff here 
} 
} 
}; 
  

我没有测试过这个解决方案，没有阻止JavaScript执行和自动图片加载，但它应该工作，不管：

  Web设置设置= webview.getSettings（）; 
 settings.setBlockNetworkLoads（true）; 
 settings.setBlockNetworkImage（true）; 
 settings.setJavaScriptEnabled（false）; 
  

Background

This may seem to be a duplicate to many other questions. Trust me that it isn't.

I'm trying to load html data into a WebView, being able to capture user hyperlink requests. In the process I've found this answer which does exactly what I want to do, except it captures other requests to things like CSS files and images:

// you tell the webclient you want to catch when a url is about to load
@Override
public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request){
    return true;
}
// here you execute an action when the URL you want is about to load
@Override
public void onLoadResource(WebView view, String url){
    if( url.equals("http://cnn.com") ){
        // do whatever you want
    }
}

I've shut off automatic image loading, network loads, and Javascript execution:

settings.setBlockNetworkLoads(true);
settings.setBlockNetworkImage(true);
settings.setJavaScriptEnabled(false);

But these do nothing as to preventing the capture of these requests.

Maybe there's a different procedure to capturing the link click, but it was either this or to stop the loading of external resources.

Question

How do I prevent WebView from capturing (or attempting to load) resource requests like CSS, JS, or images?

Otherwise if I can't prevent capturing or attempting to load, how can I differentiate between links clicked and web resources?

Thanks ahead!

解决方案

I've found a way to ignore automated WebView resource requests.

By ignoring requests in the first second of WebView initialization, I am able to isolate user based clicks from the rest:

final Long time = System.currentTimeMillis()/1000;

//load up a WebView, define a WebViewClient for capturing link clicking
WebView webview = new WebView(this);
WebViewClient webviewClient = new WebViewClient() {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request){
        return true;
    }

    @Override
    public void onLoadResource(WebView view, String url){
        Long currentTime = System.currentTimeMillis()/1000;
        if (currentTime - time > 1) {
            //do stuff here
        }
    }
};

I have not tested this solution without blocking JavaScript execution and automatic image loading, but it should work regardless:

WebSettings settings = webview.getSettings();
settings.setBlockNetworkLoads(true);
settings.setBlockNetworkImage(true);
settings.setJavaScriptEnabled(false);

这篇关于阻止Android WebView尝试加载/捕获资源，如loadData（）上的CSS的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！