将网页嵌入到android应用中

将网页嵌入到 android 应用中

 

 package com.android.webviewtest;
 import android.app.Activity;
 import android.os.Bundle;
 import android.view.KeyEvent;
 import android.webkit.WebSettings;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;


 public class MainActivity extends Activity {
     private WebView myWebView ;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         //获取webview控件
         myWebView = (WebView) findViewById(R.id.webview);
         //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) {
         // Check if the key event was the Back button and if there's history
         if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
             myWebView.goBack();
             return true;
         }
       //  return true;
         // If it wasn't the Back key or there's no web page history, bubble up to the default
         // system behavior (probably exit the activity)
         return super.onKeyDown(keyCode, event);
     }



 }

 package com.android.webviewtest;

 import android.content.Context;
 import android.webkit.JavascriptInterface;
 import android.widget.Toast;

 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();
     }
 }

html代码

 <input type="button" value="Say hello" onClick="showAndroidToast('Hello Android!')" />
 这里调用android中的方法
 <script type="text/javascript">
     function showAndroidToast(toast) {
         Android.showToast(toast);
     }