1.佈局檔案片段：res-layout

<WebView android:id="@+id/Toweb"  
     android:layout_width="fill_parent"  
     android:layout_height="fill_parent" /> 

2.Java片段：src

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        
 
//WebView
        WebView browser=(WebView)findViewById(R.id.Toweb);  
        browser.loadUrl("http://www.baidu.com");  
          
        //設定可自由縮放網頁  
        browser.getSettings().setSupportZoom(true);  
        browser.getSettings().setBuiltInZoomControls(true);  
          
        // 如果頁面中連結，如果希望點選連結繼續在當前browser中響應，  
        
 
// 而不是新開Android的系統browser中響應該連結，必須覆蓋webview的WebViewClient物件  
        browser.setWebViewClient(new WebViewClient() {  
            public boolean shouldOverrideUrlLoading(WebView view, String url)  
            {   
                //  重寫此方法表明點選網頁裡面的連結還是在當前的webview裡跳轉，不跳到瀏覽器那邊  
                view.loadUrl(url);  
                        
 
return true;  
            }         
             }); 
    }  
    
    //go back
    @Override  
    public boolean onKeyDown(int keyCode, KeyEvent event) {  
        WebView browser=(WebView)findViewById(R.id.Toweb);  
        // Check if the key event was the Back button and if there's history  
        if ((keyCode == KeyEvent.KEYCODE_BACK) && browser.canGoBack()) {  
            browser.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);  
    } 
    

3. AndroidManifest.xml 設定許可權，否則無法訪問

    <!--新增該許可權，webview可以訪問網頁-->
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>