Fragment+FragmentTabHost实现底部菜单栏

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=""android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><FrameLayoutandroid:id="@+id/realtabcontent"android:layout_width="fill_parent"android:layout_height="0dip"android:layout_weight="1" /><android.support.v4.app.FragmentTabHostandroid:id="@android:id/tabhost"android:layout_width="fill_parent"android:layout_height="wrap_content"android:background="@drawable/maintab_toolbar_bg"><FrameLayoutandroid: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=""android:layout_width="wrap_content"android:layout_height="wrap_content"android:gravity="center"android:orientation="vertical" ><ImageViewandroid: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><TextViewandroid: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：

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android=""android:layout_width="fill_parent"android:layout_height="fill_parent" ><ImageViewandroid: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：<?xml version="1.0" encoding="utf-8"?> <selector xmlns: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：<?xml version="1.0" encoding="utf-8"?> <selector xmlns: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：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TabHostmTabHost = (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：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{@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {return inflater.inflate(R.layout.fragment_1, null);}}

每天告诉自己一次，我真的很不错

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