开始： 其实对Android我只是略知皮毛中的皮毛，但是为什么会突然想来要用Android WebView呢？哈哈，答案就是：之前写了一个ChinaNet登录的PC版（C#），于是应童鞋们要求
1. 使能javascript：
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webView.getSettings().setJavaScriptEnabled(
true
);
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2. 编写本地接口
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final
class
InJavaScriptLocalObj {
public
void
showSource(String html) {
Log.d(
"HTML"
, html);
}
}
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3. 向网页暴露本地接口
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webView.addJavascriptInterface(
new
InJavaScriptLocalObj(),
"local_obj"
);
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4. 编写自己的WebViewClient，并在onPageFinished中提取网页源码。
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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);
}
}
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组合在一起的代码为：
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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);
}
}
}
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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。