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Android：在WebView中获取网页源码

2016-08-11 15:22 411 查看

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);
}
}
}

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。

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