1、布局文件main.xml

android:layout_width=”fill_parent”

android:layout_height=”fill_parent”

android:orientation=”vertical” >

android:layout_width=”fill_parent”

android:layout_height=”fill_parent”

android:id=”@+id/webview” />

2、HTML文件main.html

/* 这个函数被Activity调用 */

function wave()

{

document.getElementById(“droid”).src=”ic_launcher.png”;

}

click

3、应用程序Java源文件

import android.annotation.SuppressLint;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.webkit.WebSettings;

import android.webkit.WebView;

import android.widget.Toast;

public class MainActivity extends Activity

{

private WebView mWebView = null;

private Handler mHandler = new Handler();

@SuppressLint(“SetJavaScriptEnabled”)

@Override

public void onCreate(Bundle icicle)

{

super.onCreate(icicle);

setContentView(R.layout.activity_main);

mWebView = (WebView) findViewById(R.id.webview);

WebSettings webSettings = mWebView.getSettings();

webSettings.setJavaScriptEnabled(true);

webSettings.setSupportZoom(false);

//JSInterface这个类一定要在主线程中

mWebView.addJavascriptInterface(new interfaceTest(), “Js_interfaceTest”);

mWebView.addJavascriptInterface(new helloWorld(), “Js_helloWorld”);

mWebView.loadUrl(“file:///android_asset/main.html”);

}

class helloWorld

{

helloWorld() { }

public void show() {

mHandler.post(new Runnable() {

@Override

public void run() {

Toast.makeText(MainActivity.this,”Hello World”, Toast.LENGTH_SHORT).show();

}

});

}

}

//定义 addJavascriptInterface()的第一个参数Object

final class interfaceTest

{

interfaceTest() { }

public void clickOnAndroid()

{

mHandler.post(new Runnable()

{

@Override

public void run()

{

//调用 HTML中的javaScript函数

mWebView.loadUrl(“javascript:wave()”);

}

});

}

}

}

4、所有资源文件和html文件要放在assets目录下