Android：在WebView中获取网页源码

港控/mmm° 2022-07-19 11:53 265阅读 0赞

转载地址:[http://www.cnblogs.com/hibraincol/archive/2011/10/26/2224866.html][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);
            }
        }
    }

## 关键之处在于： ##

view.loadUrl("javascript:window.local\_obj.showSource('<head>'+document.getElementsByTagName('html')\[0\].innerHTML+'</head>');");

运行，可以看到在showSource(String html)中打印了网页源码。

[http_www.cnblogs.com_hibraincol_archive_2011_10_26_2224866.html]: http://www.cnblogs.com/hibraincol/archive/2011/10/26/2224866.html