1. activity_main.layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <WebView android:id="@+id/webView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_centerHorizontal="true" android:layout_centerVertical="true" /> </RelativeLayout>
2. MainActivity.java
package com.example.webviewhtml;
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.webkit.JavascriptInterface;
import android.webkit.WebView;
import android.webkit.WebViewClient;
/**
* Dmeo说明:
* 当WebView加载网页时获取该网页中的内容.
* 参考资料:
* http://www.maxters.net/2012/02/android-webview-get-html-source/
*/
public class MainActivity extends Activity {
private WebView mWebView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init(){
mWebView=(WebView) findViewById(R.id.webView);
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.addJavascriptInterface(new InJavaScriptLocalObj(), "local_obj");
mWebView.getSettings().setSupportZoom(true);
mWebView.getSettings().setDomStorageEnabled(true);
mWebView.getSettings().setPluginsEnabled(true);
mWebView.requestFocus();
mWebView.getSettings().setUseWideViewPort(true);
mWebView.getSettings().setLoadWithOverviewMode(true);
mWebView.getSettings().setSupportZoom(true);
mWebView.getSettings().setBuiltInZoomControls(true);
mWebView.loadUrl("http://www.baidu.com");
mWebView.setWebViewClient(new WebViewClient() {
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
view.loadUrl("javascript:window.local_obj.showSource(‘<head>‘+"
+ "document.getElementsByTagName(‘html‘)[0].innerHTML+‘</head>‘);");
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
}
});
}
/**
* android sdk api >= 17 时需要加@JavascriptInterface
* @author fei
*
*/
final class InJavaScriptLocalObj {
@JavascriptInterface
public void showSource(String html) {
System.out.println("====>html="+html);
}
}
}
3. 在AndroidManifest.xml
增加权限：
<uses-permission android:name="android.permission.INTERNET" />
时间： 2024-11-05 22:06:40