引用：http://www.iteye.com/topic/456846
Html代码
- <html>
- <script language="javascript">
- /* This function is invoked by the activity */
- function wave() {
- alert("1");
- document.getElementById("droid").src="android_waving.png";
- alert("2");
- }
- </script>
- <body>
- <!-- Calls into the javascript interface for the activity -->
- <a onClick="window.demo.clickOnAndroid()"><div style="width:80px;
- margin:0px auto;
- padding:10px;
- text-align:center;
- border:2px solid #202020;" >
- <img id="droid" src="android_normal.png"/><br>
- Click me!
- </div></a>
- </body>
- </html>
再看我们的java 代码。
Java代码
- 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");
- }
- 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;
- }
- }
- }
