現在很多Android的應用都采用底部導航欄的功能,這樣可以使得用戶在使用過程中隨意切換不同的頁面,現在我采用TabHost組件來自定義一個底部的導航欄的功能。
我們先看下該demo實例的框架圖:
其中各個類的作用以及資源文件就不詳細解釋了,還有資源圖片(在該Demo中借用了其它應用程序的資源圖片)也不提供了,大家可以自行更換自己需要的資源圖片。直接上各個布局文件或各個類的代碼:
[1] res/layout目錄下的 maintabs.xml 源碼:
[html]
- <?xml version="1.0" encoding="UTF-8"?>
- <TabHost android:id="@android:id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"
- xmlns:android="http://schemas.android.com/apk/res/android">
- <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:visibility="gone" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_weight="0.0" />
- <RadioGroup
- android:gravity="center_vertical" android:layout_gravity="bottom" android:orientation="horizontal" android:id="@id/main_radio" android:background="@drawable/maintab_toolbar_bg"
- android:layout_width="fill_parent" android:layout_height="wrap_content">
- <RadioButton android: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" />
- <RadioButton android: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" />
- <RadioButton android: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" />
- <RadioButton android: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" />
- <RadioButton android:id="@id/radio_button4" android:layout_marginTop="2.0dip" android:text="@string/more" android:drawableTop="@drawable/icon_5_n" style="@style/main_tab_bottom" />
- </RadioGroup>
- </LinearLayout>
- </TabHost>
[2] res/drawable 下的 home_btn_bg.xml 源碼:
[html]
- <?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>
[3] res/values 下的源碼:
dimens.xml源碼
[html]
- <?xml version="1.0" encoding="utf-8"?>
- <resources>
-
- <dimen name="bottom_tab_font_size">10.0sp</dimen>
- <dimen name="bottom_tab_padding_up">5.0dip</dimen>
- <dimen name="bottom_tab_padding_drawable">2.0dip</dimen>
- <dimen name="switch_logo_bottom_padding">30.0sp</dimen>
- <dimen name="widget_height">100.0dip</dimen>
- <dimen name="sta_height">48.0dip</dimen>
- <dimen name="large_padding_length">20.0dip</dimen>
- <dimen name="widget_write_margin_top">19.0dip</dimen>
- <dimen name="widget_write_margin_left">10.0dip</dimen>
- <dimen name="widget_content_margin_top">20.0dip</dimen>
- <dimen name="widget_content_margin_left">10.0dip</dimen>
- <dimen name="widget_logo_size">35.0dip</dimen>
- <dimen name="title_height">74.0dip</dimen>
- <dimen name="new_blog_size">70.0dip</dimen>
- <dimen name="emotion_item_view_height">13.299988dip</dimen>
- <dimen name="splash_test_top_margin_top">20.0dip</dimen>
- <dimen name="splash_test_center_margin_right">0.0dip</dimen>
- <dimen name="title_text_size">20.0sp</dimen>
- <dimen name="normal_padding_length">10.0dip</dimen>
- <dimen name="no_result_padding_length">50.0dip</dimen>
-
- </resources>