自定义TAB

package  com.testTabActivity;

import  java.lang.reflect.Field;
import  android.app.Activity;
import  android.app.TabActivity;
import  android.os.Build;
import  android.os.Bundle;
import  android.view.LayoutInflater;
import  android.view.View;
import  android.widget.TabHost;
import  android.widget.TabWidget;
import  android.widget.TextView;
import  android.widget.TabHost.OnTabChangeListener;

public   class  testTabActivity  extends  TabActivity {
     /**  Called when the activity is first created.  */
    @Override
     public   void  onCreate(Bundle savedInstanceState) {
         super .onCreate(savedInstanceState);

         int  width  = 45 ;
         int  height  = 48 ;

         final  TabHost tabs  =  getTabHost();
         final  TabWidget tabWidget  =  tabs.getTabWidget();

        Field mBottomLeftStrip;
        Field mBottomRightStrip;

        LayoutInflater.from( this ).inflate(R.layout.main, tabs.getTabContentView(),  true );

        tabs.addTab(tabs.newTabSpec( " first tab " )
             .setIndicator( " news " ,getResources().getDrawable(R.drawable.efg))
             .setContent(R.id.widget_layout_Blue));

        tabs.addTab(tabs.newTabSpec( " second tab " )
         .setIndicator( " help " ,getResources().getDrawable(R.drawable.c))
         .setContent(R.id.widget_layout_green));

        tabs.addTab(tabs.newTabSpec( " second tab " )
             .setIndicator( " setting " ,getResources().getDrawable(R.drawable.e))
             .setContent(R.id.widget_layout_red));



         for  ( int  i  = 0 ; i  <  tabWidget.getChildCount(); i ++ ) {
             /**
             * 设置高度、宽度，不过宽度由于设置为fill_parent，在此对它没效果
              */
            tabWidget.getChildAt(i).getLayoutParams().height  =  height;
            tabWidget.getChildAt(i).getLayoutParams().width  =  width;


          /**
          * 设置tab中标题文字的颜色，不然默认为黑色
           */
           final  TextView tv  =  (TextView) tabWidget.getChildAt(i).findViewById(android.R.id.title);

          tv.setTextColor( this .getResources().getColorStateList(android.R.color.white));




             /**
             * 此方法是为了去掉系统默认的色白的底角
             *
             * 在 TabWidget中mBottomLeftStrip、mBottomRightStrip
             * 都是私有变量，但是我们可以通过反射来获取
             *
             * 由于还不知道Android 2.2的接口是怎么样的，现在先加个判断好一些
              */
       if  (Float.valueOf(Build.VERSION.RELEASE)  <=   2.1 ) {
                try  {
                  mBottomLeftStrip  =  tabWidget.getClass().getDeclaredField ( " mBottomLeftStrip " );
                  mBottomRightStrip  =  tabWidget.getClass().getDeclaredField ( " mBottomRightStrip " );
                   if ( ! mBottomLeftStrip.isAccessible()) {
                    mBottomLeftStrip.setAccessible( true );
                  }
                   if ( ! mBottomRightStrip.isAccessible()){
                    mBottomRightStrip.setAccessible( true );
                  }
                 mBottomLeftStrip.set(tabWidget, getResources().getDrawable (R.drawable.linee));
                 mBottomRightStrip.set(tabWidget, getResources().getDrawable (R.drawable.linee));

               }  catch  (Exception e) {
                 e.printStackTrace();
               }
         }  else  {
        
         }
        View vvv  =  tabWidget.getChildAt(i);
   if (tabs.getCurrentTab() == i){
          vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.shine));
  }
   else  {
          vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.seven));
  }

        }
         /**
         * 当点击tab选项卡的时候，更改当前的背景
          */
        tabs.setOnTabChangedListener( new  OnTabChangeListener(){
   @Override
    public   void  onTabChanged(String tabId) {
     //  TODO Auto-generated method stub
     for  ( int  i  = 0 ; i  <  tabWidget.getChildCount(); i ++ ) {
     View vvv  =  tabWidget.getChildAt(i);
      if (tabs.getCurrentTab() == i){
             vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.shine));
     }
      else  {
             vvv.setBackgroundDrawable(getResources().getDrawable(R.drawable.seven));
     }
    }
   }});

    }

}