package com.android.webview.activity; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.KeyEvent; 
import android.webkit.WebView; 
 
public class MainActivity extends Activity { 
 private WebView webview; 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  //实例化WebView对象 
  webview = new WebView(this); 
  //设置WebView属性，能够执行Javascript脚本 
  webview.getSettings().setJavaScriptEnabled(true); 
  //加载需要显示的网页 
  webview.loadUrl("http://www.1sucai.cn/"); 
  //设置Web视图 
  setContentView(webview); 
 } 
  
 @Override 
 //设置回退 
 //覆盖Activity类的onKeyDown(int keyCoder,KeyEvent event)方法 
 public boolean onKeyDown(int keyCode, KeyEvent event) { 
  if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) { 
   webview.goBack(); //goBack()表示返回WebView的上一页面 
   return true; 
  } 
  return false; 
} 

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  package="com.android.webview.activity" 
  android:versionCode="1" 
  android:versionName="1.0"> 
 <uses-sdk android:minSdkVersion="10" /> 
 
 <application android:icon="@drawable/icon" android:label="@string/app_name"> 
  <activity android:name=".MainActivity" 
     android:label="@string/app_name"> 
   <intent-filter> 
    <action android:name="android.intent.action.MAIN" /> 
    <category android:name="android.intent.category.LAUNCHER" /> 
   </intent-filter> 
  </activity> 
 </application> 
 <uses-permission android:name="android.permission.INTERNET"/> 
</manifest>

package com.android.webview.activity; 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.KeyEvent; 
import android.webkit.WebView; 
import android.webkit.WebViewClient; 
 
public class MainActivity extends Activity { 
 private WebView webview; 
 @Override 
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.main); 
  webview = (WebView) findViewById(R.id.webview); 
  //设置WebView属性，能够执行Javascript脚本 
  webview.getSettings().setJavaScriptEnabled(true); 
  //加载需要显示的网页 
  webview.loadUrl("http://www.1sucai.cn/"); 
  //设置Web视图 
  webview.setWebViewClient(new HelloWebViewClient ()); 
 } 
  
 @Override 
 //设置回退 
 //覆盖Activity类的onKeyDown(int keyCoder,KeyEvent event)方法 
 public boolean onKeyDown(int keyCode, KeyEvent event) { 
  if ((keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) { 
   webview.goBack(); //goBack()表示返回WebView的上一页面 
   return true; 
  } 
  return false; 
 } 
  
 //Web视图 
 private class HelloWebViewClient extends WebViewClient { 
  @Override 
  public boolean shouldOverrideUrlLoading(WebView view, String url) { 
   view.loadUrl(url); 
   return true; 
  } 
 } 
} 

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:orientation="vertical" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" 
 > 
 <WebView 
  android:id="@+id/webview" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  /> 
</LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  package="com.android.webview.activity" 
  android:versionCode="1" 
  android:versionName="1.0"> 
 <uses-sdk android:minSdkVersion="10" /> 
 
 <application android:icon="@drawable/icon" android:label="@string/app_name"> 
  <activity android:name=".MainActivity" 
     android:label="@string/app_name"> 
   <intent-filter> 
    <action android:name="android.intent.action.MAIN" /> 
    <category android:name="android.intent.category.LAUNCHER" /> 
   </intent-filter> 
  </activity> 
 </application> 
 <uses-permission android:name="android.permission.INTERNET"/> 
</manifest>