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());
}
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。