Android：在WebView中获取网页源码

最新推荐文章于 2025-07-16 16:03:52 发布

DRPrincess

最新推荐文章于 2025-07-16 16:03:52 发布

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分类专栏： Android--UI 文章标签： webview 源码抓取网页 android html

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本文介绍如何使用Android的WebView组件来加载网页并获取其源代码。通过设置使能JavaScript、添加本地JavaScript接口、自定义WebViewClient等步骤，实现网页加载完成后自动提取并打印网页源码。

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转载地址:http://www.cnblogs.com/hibraincol/archive/2011/10/26/2224866.html

1. 使能javascript：

webView.getSettings().setJavaScriptEnabled

2. 编写本地接口

final class InJavaScriptLocalObj {
    publicvoidshowSource(String html) {
        Log.d("HTML", html);
    }
}

3. 向网页暴露本地接口

	
webView.addJavascriptInterface(newInJavaScriptLocalObj(),"local_obj");

4. 编写自己的WebViewClient，并在onPageFinished中提取网页源码

final class MyWebViewClient extendsWebViewClient{ 
    publicbooleanshouldOverrideUrlLoading(WebView view, String url) {  
        view.loadUrl(url);  
        returntrue;  
    } 
    publicvoidonPageStarted(WebView view, String url, Bitmap favicon) {
        Log.d("WebView","onPageStarted");
        super.onPageStarted(view, url, favicon);
    }   
    publicvoidonPageFinished(WebView view, String url) {
        Log.d("WebView","onPageFinished ");
        view.loadUrl("javascript:window.local_obj.showSource('<head>'+"+
                "document.getElementsByTagName('html')[0].innerHTML+'</head>');");
        super.onPageFinished(view, url);
    }
}

组合在一起的代码为：

package com.hi.briancol.htmlsource;
 
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebView;
import android.webkit.WebViewClient;
 
public class HtmlSource extendsActivity {
    privateWebView webView;
    /** Called when the activity is first created. */
    @Override
    publicvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        webView = (WebView)findViewById(R.id.webview);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.addJavascriptInterface(newInJavaScriptLocalObj(),"local_obj");
        webView.setWebViewClient(newMyWebViewClient());
        webView.loadUrl("http://www.cnblogs.com/hibraincol/");
    }
     
     
   finalclassMyWebViewClient extendsWebViewClient{ 
        publicbooleanshouldOverrideUrlLoading(WebView view, String url) {  
            view.loadUrl(url);  
            returntrue;  
        } 
        publicvoidonPageStarted(WebView view, String url, Bitmap favicon) {
            Log.d("WebView","onPageStarted");
            super.onPageStarted(view, url, favicon);
        }   
        publicvoidonPageFinished(WebView view, String url) {
            Log.d("WebView","onPageFinished ");
            view.loadUrl("javascript:window.local_obj.showSource('<head>'+"+
                    "document.getElementsByTagName('html')[0].innerHTML+'</head>');");
            super.onPageFinished(view, url);
        }
    }
     
    finalclassInJavaScriptLocalObj {
        publicvoidshowSource(String html) {
            Log.d("HTML", html);
        }
    }
}