TabWidget/TabHost的两种使用方法

Android TabWidget/TabHost有两种使用方法： 

第一种：使用系统自带写好的TabHost（及继承自TabActivity类）具体代码如下: 

 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent">
     <LinearLayout android:id="@+id/tab1"
         android:layout_width="fill_parent" android:layout_height="fill_parent"
         androidrientation="vertical">
         <TextView android:id="@+id/TextView1"
             android:text="This is a tab1" android:layout_width="fill_parent"
             android:layout_height="wrap_content">
         </TextView>
     </LinearLayout>
     <LinearLayout android:id="@+id/tab2"
         android:layout_width="fill_parent" android:layout_height="fill_parent"
         androidrientation="vertical">
         <TextView android:id="@+id/TextView2"
             android:text="This is a tab2" android:layout_width="fill_parent"
             android:layout_height="wrap_content">
         </TextView>
     </LinearLayout>
     <LinearLayout android:id="@+id/tab3"
         android:layout_width="fill_parent" android:layout_height="fill_parent"
         androidrientation="vertical">
         <TextView android:id="@+id/TextView3"
             android:text="This is a tab3" android:layout_width="fill_parent"
             android:layout_height="wrap_content">
         </TextView>
     </LinearLayout>
 </FrameLayout>

 package com.Aina.Android;

 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.TabActivity;
 import android.content.DialogInterface;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.widget.TabHost;

 public class Test_TabWidget extends TabActivity {
     /** Called when the activity is first created. */
     private TabHost tabHost;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         // setContentView(R.layout.main);
         tabHost = this.getTabHost();
         LayoutInflater li = LayoutInflater.from(this);
         li.inflate(R.layout.main, tabHost.getTabContentView(), true);
         tabHost.addTab(tabHost.newTabSpec("Tab_1").setContent(R.id.tab1)
                 .setIndicator("TAB1",
                         this.getResources().getDrawable(R.drawable.img1)));
         tabHost.addTab(tabHost.newTabSpec("Tab_2").setContent(R.id.tab2)
                 .setIndicator("TAB2",
                         this.getResources().getDrawable(R.drawable.img2)));
         tabHost.addTab(tabHost.newTabSpec("Tab_3").setContent(R.id.tab3)
                 .setIndicator("TAB3",
                         this.getResources().getDrawable(R.drawable.img3)));
         tabHost.setCurrentTab(1);
 //      tabHost.setBackgroundColor(Color.GRAY);
         tabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {

             public void onTabChanged(String tabId) {
                 Dialog dialog = new AlertDialog.Builder(Test_TabWidget.this)
                         .setTitle("提示").setMessage(
                                 "选中了" + tabId + "选项卡").setIcon(R.drawable.icon).setPositiveButton("确定", new DialogInterface.OnClickListener(){

                                     public void onClick(DialogInterface dialog,
                                             int which) {
                                         // TODO Auto-generated method stub

                                     }

                                 }).create();
                 dialog.show();

             }

         });
     }
 }

第二种：就是定义我们自己的tabHost：不用继承TabActivity，具体代码如下: 

 <?xml version="1.0" encoding="utf-8"?>
 <TabHost xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/TabHost01" android:layout_width="fill_parent"
     android:layout_height="fill_parent">
     <LinearLayout android:layout_width="fill_parent"
         android:orientation="vertical" android:layout_height="fill_parent">
         <TabWidget android:id="@android:id/tabs"
             android:layout_width="fill_parent"
             android:layout_height="wrap_content" />
         <FrameLayout android:id="@android:id/tabcontent"
             android:layout_width="fill_parent"
             android:layout_height="fill_parent">
             <LinearLayout android:id="@+id/LinearLayout1"
                 android:layout_width="fill_parent"
                 android:layout_height="wrap_content">
                 <TextView android:text="one"
                     android:id="@+id/TextView01" android:layout_width="wrap_content"
                     android:layout_height="wrap_content">
                 </TextView>
             </LinearLayout>
             <LinearLayout android:id="@+id/LinearLayout2"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content">
                 <TextView android:text="two"
                     android:id="@+id/TextView02" android:layout_width="fill_parent"
                     android:layout_height="wrap_content">
                 </TextView>
             </LinearLayout>
             <LinearLayout android:id="@+id/LinearLayout3"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content">
                 <TextView android:text="three"
                     android:id="@+id/TextView03" android:layout_width="fill_parent"
                     android:layout_height="wrap_content">
                 </TextView>
             </LinearLayout>
         </FrameLayout>
     </LinearLayout>
 </TabHost>

 package com.Aina.Android;

 import android.app.Activity;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.widget.TabHost;

 public class Test_TabHost extends Activity {
     /** Called when the activity is first created. */
     private TabHost tabHost;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         try{
             tabHost = (TabHost) this.findViewById(R.id.TabHost01);
             tabHost.setup();

             tabHost.addTab(tabHost.newTabSpec("tab_1")
                     .setContent(R.id.LinearLayout1)
                     .setIndicator("TAB1",this.getResources().getDrawable(R.drawable.img1)));
             tabHost.addTab(tabHost.newTabSpec("tab_2")
                     .setContent(R.id.LinearLayout2).setIndicator("TAB2",
                             this.getResources().getDrawable(R.drawable.img2)));
             tabHost.addTab(tabHost.newTabSpec("tab_3")
                     .setContent(R.id.LinearLayout3).setIndicator("TAB3",
                             this.getResources().getDrawable(R.drawable.img3)));
             tabHost.setCurrentTab(1);
         }catch(Exception ex){
             ex.printStackTrace();
             Log.d("EXCEPTION", ex.getMessage());
         }

     }
 }

注意：第二种方法时布局文件中的TabWidget的id必须定义为：android:id="@android:id/tabs"，FrameLayout的id必须定义为：android:id="@android:id/tabcontent" 其它控件没有限制，否则报错。