Android--底部菜单栏实现

底部菜单栏实现

效果图：
[img]

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工程结构图：
[img]

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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>

主要的代码

package com.loulijun.demo2;

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;
		}
	}
    
    
}