Fragment底部导航栏实现

//主Activity布局实现<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/shop_main"    android:orientation="vertical"    tools:context="inc.com.wuyin.activity.ShopMainActivity"    android:layout_width="match_parent"    android:layout_height="match_parent">    <FrameLayout        android:id="@+id/shop_content"        android:layout_marginTop="15dp"        android:layout_width="match_parent"        android:background="@color/white"        android:layout_height="0dp"        android:layout_weight="1">    </FrameLayout>//底部导航栏 <android.support.v4.app.FragmentTabHost        android:id="@+id/shop_tabhost"        android:background="@color/white"        android:layout_width="match_parent"        android:layout_height="wrap_content"    >        </android.support.v4.app.FragmentTabHost></LinearLayout>//主Activity，用于布置每个导航栏对应的Fragment
public class ShopMainActivity extends  FragmentActivity {    private Class fragmentArray[] = {ShopHomeFragment.class,ShopClassFragment.class, ShopCartFragment.class,  ShopMyFragment.class};    private int imageViewArray[] = {R.drawable.select_shophome,R.drawable.select_shophome,R.drawable.select_shophome,R.drawable.select_shopmy};    private String textViewArray[] = {"首页","分类", "购物车",  "我的"};    private FragmentTabHost tabHost;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_shop_main);        initView();    }    private void initView() {        tabHost = (FragmentTabHost) findViewById(R.id.shop_tabhost);        tabHost.setup(this, getSupportFragmentManager(), R.id.shop_content);        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            TabHost.TabSpec tabSpec = tabHost.newTabSpec(textViewArray[i]).setIndicator(                    getTabItemView(i));            //将Tab按钮添加进Tab选项卡中            tabHost.addTab(tabSpec, fragmentArray[i], null);            //设置Tab按钮的背景            // tabHost.setBackgroundColor(0X99000000);        }    }    public View getTabItemView(int i) {        View view = LayoutInflater.from(this).inflate(R.layout.tab_item_view, null);        ImageView imageView = (ImageView) view.findViewById(R.id.imageview);        TextView textView = (TextView) view.findViewById(R.id.textview);        imageView.setImageResource(imageViewArray[i]);        if (i==0){            imageView.setSelected(true);        }else {            imageView.setSelected(false);        }        textView.setText(textViewArray[i]);        return view;    }}
//下面是每个Fragment的实现和布局就不详细写出了