项目地址: http://code.google.com/p/apps-for-android/source/browse/#svn/trunk/Samples/WebViewDemo
Using WebViews
Article about User Interface and Web Content
WebViews allow an application to dynamically display HTML and execute JavaScript, without relinquishing control to a separate browser application. This article introduces the WebView classes and provides a sample application that demonstrates its use.
package com.google.android.webviewdemo;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.webkit.JsResult;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
/**
* Demonstrates how to embed a WebView in your activity. Also demonstrates how
* to have javascript in the WebView call into the activity, and how the activity
* can invoke javascript.
* <p>
* In this example, clicking on the android in the WebView will result in a call into
* the activities code in {@link DemoJavaScriptInterface#clickOnAndroid()}. This code
* will turn around and invoke javascript using the {@link WebView#loadUrl(String)}
* method.
* <p>
* Obviously all of this could have been accomplished without calling into the activity
* and then back into javascript, but this code is intended to show how to set up the
* code paths for this sort of communication.
*
*/
public class WebViewDemo extends Activity {
private static final String LOG_TAG = "WebViewDemo";
private WebView mWebView;
private Handler mHandler = new Handler();
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
mWebView = (WebView) findViewById(R.id.webview);
WebSettings webSettings = mWebView.getSettings();
webSettings.setSavePassword(false);
webSettings.setSaveFormData(false);
webSettings.setJavaScriptEnabled(true);
webSettings.setSupportZoom(false);
mWebView.setWebChromeClient(new MyWebChromeClient());
mWebView.addJavascriptInterface(new DemoJavaScriptInterface(), "demo");
//mWebView.loadUrl("file:///android_asset/demo.html");
mWebView.loadUrl("http://www.baidu.com");
}
final class DemoJavaScriptInterface {
DemoJavaScriptInterface() {
}
/**
* This is not called on the UI thread. Post a runnable to invoke
* loadUrl on the UI thread.
*/
public void clickOnAndroid() {
mHandler.post(new Runnable() {
public void run() {
mWebView.loadUrl("javascript：wave()");
}
});
}
}
/**
* Provides a hook for calling "alert" from javascript. Useful for
* debugging your javascript.
*/
final class MyWebChromeClient extends WebChromeClient {
@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
Log.d(LOG_TAG, message);
result.confirm();
return true;
}
}
}
http://code.google.com/p/apps-for-android/
A collection of useful, open source applications that demonstrate features of the Android platform:
Amazed: A simple but addictive accelerometer-based marble-guidance game.
AndroidGlobalTime: a full representation of the Earth that you can spin around.
AnyCut: A utility that lets users create Home screen shortcuts to nearly anything in the system.
Clickin2DaBeat: A game that mashes up YouTube with custom rhythm-game logic.
DivideAndConquer: a game in which you must isolate bouncing balls by creating walls around them.
HeightMapProfiler: A simple 3D performance testing tool that renders a 3D height map.
LOLcat Builder: O HAI. I CN HAS CHEEZBURGER?! IM N UR PHONE, CAPTIONIN UR PHOTOS.
Panoramio: An app that shows you nearby photos and points of interest.
Photostream: An app that lets you view photostreams from online photo-hosting services.
Radar: A radar-style relative location display view, used by Panoramio and others.
RingsExtended: A utility that provides enhanced control over ringtones.
Samples: Miscellaneous examples showing features of the Android platform (among which OpenGL ES).
SpriteMethodTest: An application that compares the speed of various 2D sprite drawing methods.
Translate: Translates more than 150 language pairs with Google's translation service.
WebViewDemo: How Java and JavaScript can call each other inside a WebView.
WikiNotes: A wiki note pad that uses intents to navigate to wiki words and other rich content stored in the notes.
