package com.vimi8.app.activity;import android.content.Context;import android.os.Bundle;import android.view.KeyEvent;import android.webkit.JavascriptInterface;import android.webkit.WebSettings;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Toast;import com.vimi8.app.R;import com.vimi8.app.framework.ActivityBase;/** * Created by vimi8 on 2017/4/18. */public class YyxText extends ActivityBase {    private WebView myWebView ;    @Override    protected void initVariables(Bundle savedInstanceState) {    }    @Override    protected int initLayoutViews() {        return R.layout.yyx_text;    }    @Override    protected void initViewsAndStaticData() {        //获取webview控件        myWebView = (WebView) findViewById(R.id.web_view);        //加载服务器上的页面        myWebView.loadUrl("http://www.baidu.com");        //加载本地中的html        //myWebView.loadUrl("file:///android_asset/www/test2.html");        //加上下面这段代码可以使网页中的链接不以浏览器的方式打开        myWebView.setWebViewClient(new WebViewClient());        //得到webview设置        WebSettings webSettings = myWebView.getSettings();        //允许使用javascript        webSettings.setJavaScriptEnabled(true);        //将WebAppInterface于javascript绑定        myWebView.addJavascriptInterface(new WebAppInterface(this), "Android");    }    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {            myWebView.goBack();            return true;        }        return super.onKeyDown(keyCode, event);    }    public class WebAppInterface {        Context mContext;        /** Instantiate the interface and set the context */        WebAppInterface(Context c) {            mContext = c;        }        /** Show a toast from the web page */        @JavascriptInterface        public void showToast(String toast) {            Toast.makeText(mContext, toast, Toast.LENGTH_SHORT).show();        }    }

}

下面是HTML代码

<input type="button" value="Say hello" onClick="showAndroidToast('Hello Android!')" />这里调用android中的方法