Android--底部菜单栏实现
底部菜单栏实现

效果图：
[img]

[/img]

工程结构图：
[img]

[/img]

main.xml：

drawable/home_btn_bg.xml：切换时的效果


string/dimens.xml 尺寸文件：


string/drawables.xml 设置为透明


string/styles.xml 样式文件


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));    }   @Overridepublic 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;}}        }