FragmentTabHost的简单应用

FragmentTabHost继承于TabHost组件，把TabHost和 Fragment有效的结合在了一起

参考：http://blog.csdn.net/yangyu20121224/article/details/9016223

package com.example.lenovo.myapplication;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TabHost.TabSpec;
import android.widget.TextView;

/**
 * @author yangyu
 *	功能描述：自定义TabHost
 */
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
    private Class fragmentArray[] = {FragmentPage1.class,FragmentPage2.class};

    //定义数组来存放按钮图片
    private int mImageViewArray[] = {R.drawable.tabhome,R.drawable.message};

    //Tab选项卡的文字
    private String mTextviewArray[] = {"首页", "消息"};

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_tab_layout);

        initView();
    }

    /**
     * 初始化组件
     */
    private void initView(){
        //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);
        mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);

        //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);
            //设置Tab按钮的背景
            mTabHost.getTabWidget().getChildAt(i).setBackgroundResource(R.drawable.bg);
        }
    }

    /**
     * 给Tab按钮设置图标和文字
     */
    private View getTabItemView(int index){
        View view = layoutInflater.inflate(R.layout.tab_item_view, 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;
    }
}

main_tab_layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <FrameLayout
        android:id="@+id/realtabcontent"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="1" />  /<span style="color:#FF0000;"><strong>/如果把这个内容放置在最下面，Tab就在上面了</strong></span>

    <android.support.v4.app.FragmentTabHost
        android:id="@android:id/tabhost"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        >

        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_weight="0" />
    </android.support.v4.app.FragmentTabHost>

</LinearLayout>

tab_item_view

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/imageview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:focusable="false"
        android:padding="3dp"
        android:src="@drawable/tabhome">
    </ImageView>

    <TextView
        android:id="@+id/textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="首页"
        android:textSize="10sp"
        android:textColor="#ffffff">
    </TextView>

</LinearLayout>

fragment_2

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <ImageView
            android:id="@+id/imageview"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:scaleType="fitCenter"
            android:src="@drawable/hydrangeas" >
        </ImageView>

    </LinearLayout>

fragment_2

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <ImageView
            android:id="@+id/imageview"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:scaleType="fitCenter"
            android:src="@drawable/desert" >
        </ImageView>

    </LinearLayout>