Android中的假TabHost-只是在上层覆盖了一层TabWidget

TabHost是整个Tab的容器，包含TabWidget和FrameLayout两个部分，TabWidget是每个Tab的表情，FrameLayout是Tab内容。

实现方法：继承TabActivity

1.界面布局

1）、TabHost　　　　必须设置android:id为@android:id/tabhost
2）、TabWidget　　　必须设置android:id为@android:id/tabs
3）、FrameLayout　  必须设置android:id为@android:id/tabcontent

子activity必须是线性布局LinearLayout，否则的话可以显示tabs但是无法显示其它activity

2.实现方法

@Override
protected void onCreate(Bundle savedInstanceState) {
   // TODO Auto-generated method stub
   super.onCreate(savedInstanceState);
   requestWindowFeature(Window.FEATURE_NO_TITLE);
       setContentView(R.layout.maintabs);

       tabHost = getTabHost();

       tabHost.addTab(tabHost.newTabSpec(TAB_SALE)
         .setIndicator(TAB_SALE)
         .setContent(new Intent(this, SaleActivity.class)
         .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)));//每次点击都会刷新
       tabHost.addTab(tabHost.newTabSpec(TAB_CART)
              .setIndicator(TAB_CART)
              .setContent(new Intent(this, CartActivity.class)
         .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)));
       tabHost.addTab(tabHost.newTabSpec(TAB_REPORT)
              .setIndicator(TAB_REPORT)
              .setContent(new Intent(this, ReportActivity.class)
         .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)));
       tabHost.addTab(tabHost.newTabSpec(TAB_SETUP)
              .setIndicator(TAB_SETUP)
              .setContent(new Intent(this, SetupActivity.class)
         .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)));
       
       linearLayout1 = (LinearLayout)findViewById(R.id.linearLayout1);       
       linearLayout1.setOnClickListener(new OnClickListener() {
           @Override
      public void onClick(View v) {
              tabHost.setCurrentTabByTag(TAB_SALE);
      }
   });   
       linearLayout2 = (LinearLayout)findViewById(R.id.linearLayout2);      
       linearLayout2.setOnClickListener(new OnClickListener() {
           @Override
      public void onClick(View v) {
              tabHost.setCurrentTabByTag(TAB_CART);
      }
   });
       linearLayout3 = (LinearLayout)findViewById(R.id.linearLayout3);       
       linearLayout3.setOnClickListener(new OnClickListener() {
           @Override
      public void onClick(View v) {
              tabHost.setCurrentTabByTag(TAB_REPORT);
      }
   });
       linearLayout4 = (LinearLayout)findViewById(R.id.linearLayout4);       
       linearLayout4.setOnClickListener(new OnClickListener() {
           @Override
      public void onClick(View v) {
              tabHost.setCurrentTabByTag(TAB_SETUP);
      }
   });
   
}