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   源码介绍

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通过TabWidget实现

 

实现方式二：隐藏TabWidget，通过RadioGroup和RadioButton实现底部菜单栏

 

实现方式一：通过TabWidget实现

这种方式主要是在布局中将TabWidget标签嵌套在RelativeLayout中，并且在TabWidget标签中中设置 android:layout_alignParentBottom="true"

另外，下划线和选项卡之间的线去除的方法时在TabWidget标签中设置属性android:tabStripEnabled="false"

 

xml：

 

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
     <FrameLayout 
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:padding="5dp"
            ></FrameLayout>

    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <!-- tabStripEnabled属性去掉底部下划线与选项卡间的下划线 -->
        <!-- layout_alignParentBottom属性即可将其放在底部菜单栏，注意，必须在RelativeLayout里 -->
        <TabWidget 
            android:id="@android:id/tabs"
            android:tabStripEnabled="false"
            android:background="#6E6E6E"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            ></TabWidget>
       
    </RelativeLayout>

</TabHost>

 

实现代码如下

 

package com.loulijun.demo1;

import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TabHost;

public class Demo1Activity extends TabActivity {
    /** Called when the activity is first created. */
    private TabHost tabhost;
    private Intent intent1, intent2, intent3, intent4;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tabhost = getTabHost();
        
        intent1 = new Intent(Demo1Activity.this, One.class);
        tabhost.addTab(tabhost.newTabSpec("one")
                .setIndicator("电话",getResources().getDrawable(android.R.drawable.ic_menu_call))
                .setContent(intent1));
        
        intent2 = new Intent(Demo1Activity.this, Two.class);
        tabhost.addTab(tabhost.newTabSpec("two")
                .setIndicator("相机",getResources().getDrawable(android.R.drawable.ic_menu_camera))
                .setContent(intent2));
        
        intent3 = new Intent(Demo1Activity.this, Three.class);
        tabhost.addTab(tabhost.newTabSpec("three")
                .setIndicator("分享",getResources().getDrawable(android.R.drawable.ic_menu_share))
                .setContent(intent3));
        
        intent4 = new Intent(Demo1Activity.this, Four.class);
        tabhost.addTab(tabhost.newTabSpec("four")
                .setIndicator("更多",getResources().getDrawable(android.R.drawable.ic_menu_more))
                .setContent(intent4));
    }
}

 

 

 

 

实现方式二：隐藏TabWidget，通过RadioGroup和RadioButton实现底部菜单栏

这种方式更漂亮，也更灵活，网上基本用的是这种方式，通过setCurrentTabByTag来切换不同的选项卡

main.xml：

 

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <FrameLayout 
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="0.0dip"
            android:layout_weight="1.0"/>
        <TabWidget 
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_weight="0.0"
            android:visibility="gone"/>
        <RadioGroup
            android:id="@ id/main_tab"
            android:background="@drawable/maintab_toolbar_bg"
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:gravity="center_vertical"
            android:layout_gravity="bottom">
            <RadioButton 
                android:layout_marginTop="2.0dip"
                android:text="@string/main_home"
                android:drawableTop="@drawable/icon_1_n"
                android:id="@ id/radio_button0"
                style="@style/main_tab_bottom"/>
            <RadioButton 
                android:layout_marginTop="2.0dip"
                android:text="@string/main_news"
                android:drawableTop="@drawable/icon_2_n"
                android:id="@ id/radio_button1"
                style="@style/main_tab_bottom"/>
            <RadioButton 
                android:layout_marginTop="2.0dip"
                android:text="@string/main_my_info"
                android:drawableTop="@drawable/icon_3_n"
                android:id="@ id/radio_button2"
                style="@style/main_tab_bottom"/>
            <RadioButton 
                android:layout_marginTop="2.0dip"
                android:text="@string/menu_search"
                android:drawableTop="@drawable/icon_4_n"
                android:id="@ id/radio_button3"
                style="@style/main_tab_bottom"/>
            <RadioButton 
                android:layout_marginTop="2.0dip"
                android:text="@string/more"
                android:drawableTop="@drawable/icon_5_n"
                android:id="@ id/radio_button4"
                style="@style/main_tab_bottom"/>
        </RadioGroup>
    </LinearLayout>
</TabHost>

 

 

 

drawable/home_btn_bg.xml：切换时的效果：

 

<?xml version="1.0" encoding="UTF-8"?>
<selector
  xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:state_enabled="true" android:state_pressed="false" android:drawable="@drawable/home_btn_bg_s" />
    <item android:state_enabled="true" android:state_pressed="true" android:drawable="@drawable/home_btn_bg_s" />
    <item android:state_enabled="true" android:state_checked="true" android:drawable="@drawable/home_btn_bg_d" />
    <item android:drawable="@drawable/transparent" />
</selector>

string/dimens.xml 尺寸文件：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <dimen name="bottom_tab_padding_drawable">2.0dip</dimen>
    <dimen name="bottom_tab_padding_up">5.0dip</dimen>
    <dimen name="bottom_tab_font_size">10.0dip</dimen>
</resources>

string/drawables.xml 设置为透明:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<item type="drawable" name="transparent">#00000000</item>
</resources>

string/styles.xml 样式文件:

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="main_tab_bottom">
    <item name="android:textSize">@dimen/bottom_tab_font_size</item>
    <item name="android:textColor">#ffffffff</item>
    <item name="android:ellipsize">marquee</item>
    <item name="android:gravity">center_horizontal</item>
    <item name="android:background">@drawable/home_btn_bg</item>
    <item name="android:paddingTop">@dimen/bottom_tab_padding_up</item>
    <item name="android:layout_width">fill_parent</item>
    <item name="android:layout_height">wrap_content</item>
    <item name="android:button">@null</item>
    <item name="android:singleLine">true</item>
    <item name="android:drawablePadding">@dimen/bottom_tab_padding_drawable</item>
    <item name="android:layout_weight">1.0</item>
</style>
</resources>

代码实现：

 

import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;
import android.widget.RadioGroup;
import android.widget.TabHost;
import android.widget.RadioGroup.OnCheckedChangeListener;
public class MainTabActivity extends TabActivity implements OnCheckedChangeListener{
    private RadioGroup mainTab;
    private TabHost tabhost;
    private Intent iHome;
    private Intent iNews;
    private Intent iInfo;
    private Intent iSearch;
    private Intent iMore;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main);
        mainTab=(RadioGroup)findViewById(R.id.main_tab);
        mainTab.setOnCheckedChangeListener(this);
        tabhost = getTabHost();
        
        iHome = new Intent(this, HomeActivity.class);
        tabhost.addTab(tabhost.newTabSpec("iHome")
                .setIndicator(getResources().getString(R.string.main_home), getResources().getDrawable(R.drawable.icon_1_n))
                .setContent(iHome));
        
        iNews = new Intent(this, NewsActivity.class);
        tabhost.addTab(tabhost.newTabSpec("iNews")
                .setIndicator(getResources().getString(R.string.main_news), getResources().getDrawable(R.drawable.icon_2_n))
                .setContent(iNews));
        
        iInfo = new Intent(this, MyInfoActivity.class);
        tabhost.addTab(tabhost.newTabSpec("iInfo")
                .setIndicator(getResources().getString(R.string.main_my_info), getResources().getDrawable(R.drawable.icon_3_n))
                .setContent(iInfo));
        
        iSearch = new Intent(this,SearchActivity.class);
        tabhost.addTab(tabhost.newTabSpec("iSearch")
                .setIndicator(getResources().getString(R.string.menu_search), getResources().getDrawable(R.drawable.icon_4_n))
                .setContent(iSearch));
        
        iMore = new Intent(this, MoreActivity.class);
         tabhost.addTab(tabhost.newTabSpec("iMore")
                    .setIndicator(getResources().getString(R.string.more), getResources().getDrawable(R.drawable.icon_5_n))
                    .setContent(iMore));
    }
   

    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {
        switch(checkedId){
        case R.id.radio_button0:
            this.tabhost.setCurrentTabByTag("iHome");
            break;
        case R.id.radio_button1:
            this.tabhost.setCurrentTabByTag("iNews");
            break;
        case R.id.radio_button2:
            this.tabhost.setCurrentTabByTag("iInfo");
            break;
        case R.id.radio_button3:
            this.tabhost.setCurrentTabByTag("iSearch");
            break;
        case R.id.radio_button4:
            this.tabhost.setCurrentTabByTag("iMore");
            break;
        }
    }  
}