Fragment+FragmentTabHost实现仿新浪微博底部菜单栏

一、实现效果图

二、项目工程结构

 

三、详细代码编写

 

1、主tab布局界面，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" />

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

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

 </LinearLayout>

2、Tab按钮选项布局，tab_item_view.xml：

 <?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/tab_home_btn">
     </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>

3、fragment布局界面，这里只列出一个，fragment_1.xml：

 <span style="font-size:12px;"><?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" >

     <ImageView
         android:id="@+id/imageview"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:scaleType="fitCenter"
         android:src="@drawable/xianjian01" >
     </ImageView>

 </LinearLayout></span>

4、Tab选项的自定义按钮资源文件，列出其中一个按钮，tab_home_btn：

 <span style="font-size:12px;"><?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">

     <item android:drawable="@drawable/icon_home_sel" android:state_selected="true"/>
     <item android:drawable="@drawable/icon_home_nor"/>

 </selector></span>

5、Tab选项按钮背景资源文件，selector_tab_background.xml：

 <span style="font-size:12px;"><?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">

     <item android:drawable="@drawable/home_btn_bg" android:state_pressed="true"/>
     <item android:drawable="@drawable/home_btn_bg" android:state_selected="true"/>

 </selector></span>

6、主Activity类，MainTabActivity.java：

 <span style="font-size:12px;">package com.yangyu.mycustomtab02;

 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 MainTabActivity 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,FragmentPage3.class,FragmentPage4.class,FragmentPage5.class};

     //定义数组来存放按钮图片
     private int mImageViewArray[] = {R.drawable.tab_home_btn,R.drawable.tab_message_btn,R.drawable.tab_selfinfo_btn,
                                      R.drawable.tab_square_btn,R.drawable.tab_more_btn};

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

     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.selector_tab_background);
         }
     }

     /**
      * 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;
     }
 }</span>

7、Fragment页面，FragmentPage1.java：

 <span style="font-size:12px;">package com.yangyu.mycustomtab02;

 import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;

 public class FragmentPage1 extends Fragment{

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
         return inflater.inflate(R.layout.fragment_1, null);
     }
 }
 </span>