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webView---------js 与 WebView 交互

2011-09-26 13:51 477 查看

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>



<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;

}

}

}

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