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);

         }

     }

 }