FragmentTabHost+ViewPager实现底部按钮

 package com.example.fragmenttabdemo;
 
 import java.util.ArrayList;
 import java.util.List;
 
 import android.annotation.SuppressLint;
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentPagerAdapter;
 import android.support.v4.app.FragmentTabHost;
 import android.support.v4.view.ViewPager;
 import android.support.v4.view.ViewPager.OnPageChangeListener;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TabHost.OnTabChangeListener;
 import android.widget.TabHost.TabSpec;
 import android.widget.TabWidget;
 import android.widget.TextView;
 
 @SuppressLint("InflateParams")
 public class MainActivity extends FragmentActivity {
     // 定义FragmentTabHost对象
     private FragmentTabHost mTabHost;
     // 定义一个布局
     private LayoutInflater layoutInflater;
     // 定义数组来存放Fragment界面
     @SuppressWarnings("rawtypes")
     private Class fragmentArray[] = { FragmentPage1.class, FragmentPage1.class,
             FragmentPage1.class, FragmentPage1.class, FragmentPage1.class };
     // 定义数组来存放按钮图片
     private int mImageViewArray[] = { R.drawable.ic_launcher,
             R.drawable.ic_launcher, R.drawable.ic_launcher,
             R.drawable.ic_launcher, R.drawable.ic_launcher };
     // Tab选项卡的文字
     private String mTextviewArray[] = { "首页", "消息", "好友", "广场", "更多" };
     private ViewPager vp;
     private List<Fragment> list = new ArrayList<Fragment>();
 
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         initView();
         initPager();
     }
 
     /**
      * 初始化组件
      */
     private void initView() {
         vp = (ViewPager) findViewById(R.id.pager);
         vp.setOnPageChangeListener(new ViewPagerListener());
         // MyAdapter adapter = new MyAdapter();
         // vp.setAdapter(adapter);
         // 实例化布局对象
         layoutInflater = LayoutInflater.from(this);
         // 实例化TabHost对象，得到TabHost
         mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
         // 得到对象后，初始化
         // mTabHost.getTabWidget().setDividerDrawable(android.R.color.transparent);
         mTabHost.setup(this, getSupportFragmentManager(), R.id.pager);
         mTabHost.setOnTabChangedListener(new TabHostListener());
         // 得到fragment的个数
         int count = fragmentArray.length;
 
         for (int i = 0; i < count; i++) {
             // 为每一个Tab按钮设置图标、文字和内容
             TabSpec tabSpec = mTabHost.newTabSpec(mTextviewArray[i])
                     .setIndicator(getTabItemView(i));
             // 将Tab按钮添加进Tab选项卡中
             mTabHost.addTab(tabSpec, fragmentArray[i], null);
             mTabHost.setTag(i);
             mTabHost.getTabWidget().setDividerDrawable(
                     android.R.color.transparent);
             // 设置Tab按钮的背景
             // mTabHost.getTabWidget().getChildAt(i)
             // .setBackgroundResource(R.drawable.selector_tab_background);
         }
     }
 
     //初始化viewpager
     private void initPager() {
         FragmentPage1 p1 = new FragmentPage1();
         FragmentPage1 p2 = new FragmentPage1();
         FragmentPage1 p3 = new FragmentPage1();
         FragmentPage1 p4 = new FragmentPage1();
         FragmentPage1 p5 = new FragmentPage1();
         list.add(p1);
         list.add(p2);
         list.add(p3);
         list.add(p4);
         list.add(p5);
         vp.setAdapter(new MyAdapter(getSupportFragmentManager()));
     }
 
     /**
      * 给Tab按钮设置图标和文字
      */
     private View getTabItemView(int index) {
         View view = layoutInflater.inflate(R.layout.btn_bottom, null);
         ImageView imageView = (ImageView) view.findViewById(R.id.imageview);
         imageView.setImageResource(mImageViewArray[index]);
         TextView textView = (TextView) view.findViewById(R.id.textview);
         textView.setText(mTextviewArray[index]);
         return view;
     }
 
     private class TabHostListener implements OnTabChangeListener {
         @Override
         public void onTabChanged(String tabId) {
             int position = mTabHost.getCurrentTab();
             vp.setCurrentItem(position);
         }
     }
 
     class MyAdapter extends FragmentPagerAdapter {
 
         public MyAdapter(FragmentManager fm) {
             super(fm);
             // TODO Auto-generated constructor stub
         }
 
         @Override
         public Fragment getItem(int arg0) {
             return list.get(arg0);
         }
 
         @Override
         public int getCount() {
             return list.size();
         }
 
     }
 
     class ViewPagerListener implements OnPageChangeListener {
 
         public void onPageScrollStateChanged(int arg0) {
 
         }
 
         public void onPageScrolled(int arg0, float arg1, int arg2) {
 
         }
 
         public void onPageSelected(int index) {
             TabWidget widget = mTabHost.getTabWidget();
             int oldFocusability = widget.getDescendantFocusability();
             widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
             mTabHost.setCurrentTab(index);
             widget.setDescendantFocusability(oldFocusability);
         }
     }
 }