现在很多android的应用都采用底部导航栏的功能,这样可以使得用户在使用过程中随意切换不同的页面,现在我采用TabHost组件来自定义一个底部的导航栏的功能。
我们先看下该demo实例的框架图:
其中各个类的作用以及资源文件就不详细解释了,还有资源图片(在该Demo中借用了其它应用程序的资源图片)也不提供了,大家可以自行更换自己需要的资源图片。直接上各个布局文件或各个类的代码:
[1] res/layout目录下的 maintabs.xml 源码:
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<?xmlversion="1.0"encoding="UTF-8"?>
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<TabHostandroid:id="@android:id/tabhost"android:layout_width="fill_parent"android:layout_height="fill_parent"
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xmlns:android="http://schemas.android.com/apk/res/android">
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<LinearLayoutandroid:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent">
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<FrameLayoutandroid:id="@android:id/tabcontent"android:layout_width="fill_parent"android:layout_height="0.0dip"android:layout_weight="1.0"/>
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<TabWidgetandroid:id="@android:id/tabs"android:visibility="gone"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="0.0"/>
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<RadioGroup
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android:gravity="center_vertical"android:layout_gravity="bottom"android:orientation="horizontal"android:id="@id/main_radio"android:background="@drawable/maintab_toolbar_bg"
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android:layout_width="fill_parent"android:layout_height="wrap_content">
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<RadioButtonandroid:id="@id/radio_button0"android:layout_marginTop="2.0dip"android:text="@string/main_home"android:drawableTop="@drawable/icon_1_n"style="@style/main_tab_bottom"/>
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<RadioButtonandroid:id="@id/radio_button1"android:layout_marginTop="2.0dip"android:text="@string/main_news"android:drawableTop="@drawable/icon_2_n"style="@style/main_tab_bottom"/>
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<RadioButtonandroid:id="@id/radio_button2"android:layout_marginTop="2.0dip"android:text="@string/main_manage_date"android:drawableTop="@drawable/icon_3_n"style="@style/main_tab_bottom"/>
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<RadioButtonandroid:id="@id/radio_button3"android:layout_marginTop="2.0dip"android:text="@string/main_friends"android:drawableTop="@drawable/icon_4_n"style="@style/main_tab_bottom"/>
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<RadioButtonandroid:id="@id/radio_button4"android:layout_marginTop="2.0dip"android:text="@string/more"android:drawableTop="@drawable/icon_5_n"style="@style/main_tab_bottom"/>
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</RadioGroup>
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</LinearLayout>
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</TabHost>
[2] res/drawable 下的 home_btn_bg.xml 源码:
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<?xmlversion="1.0"encoding="UTF-8"?>
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<selector
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xmlns:android="http://schemas.android.com/apk/res/android">
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<itemandroid:state_focused="true"android:state_enabled="true"android:state_pressed="false"android:drawable="@drawable/home_btn_bg_s"/>
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<itemandroid:state_enabled="true"android:state_pressed="true"android:drawable="@drawable/home_btn_bg_s"/>
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<itemandroid:state_enabled="true"android:state_checked="true"android:drawable="@drawable/home_btn_bg_d"/>
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<itemandroid:drawable="@drawable/transparent"/>
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</selector>
[3] res/values 下的源码:
dimens.xml源码
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<?xmlversion="1.0"encoding="utf-8"?>
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<resources>
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<dimenname="bottom_tab_font_size">10.0sp</dimen>
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<dimenname="bottom_tab_padding_up">5.0dip</dimen>
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<dimenname="bottom_tab_padding_drawable">2.0dip</dimen>
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<dimenname="switch_logo_bottom_padding">30.0sp</dimen>
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<dimenname="widget_height">100.0dip</dimen>
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<dimenname="sta_height">48.0dip</dimen>
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<dimenname="large_padding_length">20.0dip</dimen>
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<dimenname="widget_write_margin_top">19.0dip</dimen>
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<dimenname="widget_write_margin_left">10.0dip</dimen>
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<dimenname="widget_content_margin_top">20.0dip</dimen>
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<dimenname="widget_content_margin_left">10.0dip</dimen>
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<dimenname="widget_logo_size">35.0dip</dimen>
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<dimenname="title_height">74.0dip</dimen>
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<dimenname="new_blog_size">70.0dip</dimen>
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<dimenname="emotion_item_view_height">13.299988dip</dimen>
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<dimenname="splash_test_top_margin_top">20.0dip</dimen>
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<dimenname="splash_test_center_margin_right">0.0dip</dimen>
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<dimenname="title_text_size">20.0sp</dimen>
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<dimenname="normal_padding_length">10.0dip</dimen>
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<dimenname="no_result_padding_length">50.0dip</dimen>
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</resources>
drawables.xml源码:
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<?xmlversion="1.0"encoding="utf-8"?>
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<resources>
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<itemtype="drawable"name="ltgray">#fff4f4f4</item>
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<itemtype="drawable"name="ltyellow">#fffff4db</item>
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<itemtype="drawable"name="black">#ff000000</item>
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<itemtype="drawable"name="transparent">#00000000</item>
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<itemtype="drawable"name="widget_edit_block_bg_normal">@android:color/transparent</item>
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<itemtype="drawable"name="transparent_background">#99000000</item>
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<itemtype="drawable"name="list_background">#fff4f4f4</item>
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<itemtype="drawable"name="namcard_picker_bkg_normal">#ff272727</item>
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<itemtype="drawable"name="namcard_picker_bkg_hover">#ff333333</item>
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</resources>
ids.xml源码:
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<?xmlversion="1.0"encoding="utf-8"?>
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<resources>
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<itemtype="id"name="main_radio">false</item>
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<itemtype="id"name="radio_button0">false</item>
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<itemtype="id"name="radio_button1">false</item>
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<itemtype="id"name="radio_button2">false</item>
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<itemtype="id"name="radio_button3">false</item>
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<itemtype="id"name="radio_button4">false</item>
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</resources>
strings.xml源码:
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<?xmlversion="1.0"encoding="utf-8"?>
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<resources>
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<stringname="hello">HelloWorld,MainTabActivity!</string>
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<stringname="app_name">TabDemo</string>
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<stringname="main_news">消息</string>
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<stringname="main_home">首页</string>
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<stringname="more">更多</string>
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<stringname="main_manage_date">时间</string>
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<stringname="main_friends">好友</string>
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</resources>
styles.xml源码:
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<?xmlversion="1.0"encoding="utf-8"?>
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<resources>
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<stylename="main_tab_bottom">
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<itemname="android:textSize">@dimen/bottom_tab_font_size</item>
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<itemname="android:textColor">#ffffffff</item>
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<itemname="android:ellipsize">marquee</item>
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<itemname="android:gravity">center_horizontal</item>
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<itemname="android:background">@drawable/home_btn_bg</item>
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<itemname="android:paddingTop">@dimen/bottom_tab_padding_up</item>
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<itemname="android:paddingBottom">2.0dip</item>
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<itemname="android:layout_width">fill_parent</item>
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<itemname="android:layout_height">wrap_content</item>
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<itemname="android:layout_marginBottom">2.0dip</item>
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<itemname="android:button">@null</item>
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<itemname="android:singleLine">true</item>
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<itemname="android:drawablePadding">@dimen/bottom_tab_padding_drawable</item>
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<itemname="android:layout_weight">1.0</item>
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</style>
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</resources>
[4] src/com.andyidea.tabdemo包下面各个UI界面类源码:
MainTabActivity.java源码:
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packagecom.andyidea.tabdemo;
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importandroid.app.TabActivity;
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importandroid.content.Intent;
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importandroid.os.Bundle;
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importandroid.view.Window;
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importandroid.widget.CompoundButton;
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importandroid.widget.RadioButton;
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importandroid.widget.CompoundButton.OnCheckedChangeListener;
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importandroid.widget.TabHost;
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publicclassMainTabActivityextendsTabActivityimplementsOnCheckedChangeListener{
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privateTabHostmTabHost;
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privateIntentmAIntent;
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privateIntentmBIntent;
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privateIntentmCIntent;
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privateIntentmDIntent;
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privateIntentmEIntent;
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/**Calledwhentheactivityisfirstcreated.*/
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@Override
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publicvoidonCreate(BundlesavedInstanceState){
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super.onCreate(savedInstanceState);
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requestWindowFeature(Window.FEATURE_NO_TITLE);
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setContentView(R.layout.maintabs);
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this.mAIntent=newIntent(this,AActivity.class);
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this.mBIntent=newIntent(this,BActivity.class);
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this.mCIntent=newIntent(this,CActivity.class);
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this.mDIntent=newIntent(this,DActivity.class);
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this.mEIntent=newIntent(this,EActivity.class);
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((RadioButton)findViewById(R.id.radio_button0))
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.setOnCheckedChangeListener(this);
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((RadioButton)findViewById(R.id.radio_button1))
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.setOnCheckedChangeListener(this);
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((RadioButton)findViewById(R.id.radio_button2))
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.setOnCheckedChangeListener(this);
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((RadioButton)findViewById(R.id.radio_button3))
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.setOnCheckedChangeListener(this);
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((RadioButton)findViewById(R.id.radio_button4))
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.setOnCheckedChangeListener(this);
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setupIntent();
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}
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@Override
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publicvoidonCheckedChanged(CompoundButtonbuttonView,booleanisChecked){
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if(isChecked){
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switch(buttonView.getId()){
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caseR.id.radio_button0:
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this.mTabHost.setCurrentTabByTag("A_TAB");
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break;
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caseR.id.radio_button1:
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this.mTabHost.setCurrentTabByTag("B_TAB");
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break;
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caseR.id.radio_button2:
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this.mTabHost.setCurrentTabByTag("C_TAB");
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break;
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caseR.id.radio_button3:
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this.mTabHost.setCurrentTabByTag("D_TAB");
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break;
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caseR.id.radio_button4:
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this.mTabHost.setCurrentTabByTag("MORE_TAB");
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break;
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}
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}
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}
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privatevoidsetupIntent(){
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this.mTabHost=getTabHost();
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TabHostlocalTabHost=this.mTabHost;
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localTabHost.addTab(buildTabSpec("A_TAB",R.string.main_home,
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R.drawable.icon_1_n,this.mAIntent));
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localTabHost.addTab(buildTabSpec("B_TAB",R.string.main_news,
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R.drawable.icon_2_n,this.mBIntent));
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localTabHost.addTab(buildTabSpec("C_TAB",
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R.string.main_manage_date,R.drawable.icon_3_n,
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this.mCIntent));
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localTabHost.addTab(buildTabSpec("D_TAB",R.string.main_friends,
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R.drawable.icon_4_n,this.mDIntent));
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localTabHost.addTab(buildTabSpec("MORE_TAB",R.string.more,
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R.drawable.icon_5_n,this.mEIntent));
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}
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privateTabHost.TabSpecbuildTabSpec(Stringtag,intresLabel,intresIcon,
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finalIntentcontent){
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returnthis.mTabHost.newTabSpec(tag).setIndicator(getString(resLabel),
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getResources().getDrawable(resIcon)).setContent(content);
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}
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}
其中 AActivity.java 与 BActivity.java ,CActivity.java ,DActivity.java ,EActivity.java 中的源码都一样,只是用来表示不同的界面展示,故这里只列出 AActivity.java的源码:
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packagecom.andyidea.tabdemo;
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importandroid.app.Activity;
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importandroid.os.Bundle;
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importandroid.view.Gravity;
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importandroid.widget.TextView;
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publicclassAActivityextendsActivity{
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@Override
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publicvoidonCreate(BundlesavedInstanceState){
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super.onCreate(savedInstanceState);
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TextViewtv=newTextView(this);
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tv.setText("ThisisAActivity!");
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tv.setGravity(Gravity.CENTER);
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setContentView(tv);
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}
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}
最后,大家别忘了在 AndroidManifest.xml 文件中注册各个 Activity 组件哦。好了,现在我们看下我们程序运行的效果图:
到此就实现了一个比较流行的底部导航栏的功能了,转载请注明出处,谢谢大家!
由于需要该实例源码的童鞋比较多,我还是把源码放到资源中供大家下载:http://download.csdn.net/detail/cjjky/4236055
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