底部菜单栏(三)Fragment+FragmentTabHost实现仿新浪微博底部菜单栏

China☆狼群 提交于 2020-02-03 19:35:33

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:

 

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<?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:

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<?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:

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<?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>

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:

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<?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>

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

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<?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>

6、主Activity类,MainTabActivity.java:

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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; 
    
}

7、Fragment页面,FragmentPage1.java:

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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);      
    }    
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