`
helpbs
  • 浏览: 1159069 次
文章分类
社区版块
存档分类
最新评论

Android： 在WebView中获取网页源码

 
阅读更多

1. 使能javascript：

?
1
webView.getSettings().setJavaScriptEnabled(true);

2. 编写本地接口

?
1
2
3
4
5
final class InJavaScriptLocalObj {
public void showSource(String html) {
Log.d("HTML", html);
}
}


3. 向网页暴露本地接口

?
1
webView.addJavascriptInterface(new InJavaScriptLocalObj(), "local_obj");


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

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
final class MyWebViewClient extends WebViewClient{
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
public void onPageStarted(WebView view, String url, Bitmap favicon) {
Log.d("WebView","onPageStarted");
super.onPageStarted(view, url, favicon);
}
public void onPageFinished(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：

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
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 extends Activity {
private WebView webView;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webView = (WebView)findViewById(R.id.webview);
webView.getSettings().setJavaScriptEnabled(true);
webView.addJavascriptInterface(new InJavaScriptLocalObj(), "local_obj");
webView.setWebViewClient(new MyWebViewClient());
webView.loadUrl("http://www.cnblogs.com/hibraincol/");
}
final class MyWebViewClient extends WebViewClient{
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
public void onPageStarted(WebView view, String url, Bitmap favicon) {
Log.d("WebView","onPageStarted");
super.onPageStarted(view, url, favicon);
}
public void onPageFinished(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);
}
}
final class InJavaScriptLocalObj {
public void showSource(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。

分享到：
| Android错误引用自定义资源数据类型，造成 ...
评论
发表评论

您还没有登录,请您登录后再发表评论

相关推荐

Magicbox
Global site tag (gtag.js) - Google Analytics