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Andorid UI设计技巧

 
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1.使用include标签实现包含共享UI设计

(1)创建新的布局文件 title_layout.xml,里面包含共享内容的布局

(2)layout属性:其对应抽取出来的共享的布局内容

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation
="vertical"
android:background
="@drawable/share_background"
android:layout_width
="fill_parent"
android:layout_height
="fill_parent">
<include layout="@layout/title_layout"></include>
</LinearLayout>

2.使用shapes实现渐变效果

(1)创建新的drawable的xml文件

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<gradient android:startColor="#FFFF0000" android:endColor="#80FF00FF"
android:angle
="270"/>
<padding android:left="50dp" android:top="20dp"
android:right
="7dp" android:bottom="7dp" />
<corners android:radius="8dp" />
</shape>

gradient 产生颜色渐变 android:angle 从哪个角度开始变 貌似只有90的整数倍可以

android:shape="rectangle" 默认的也是长方形

corners表示是有半径

(还有很多其它参数)

(2)设置android:background属性

android:background="@drawable/share_background"

3.灵活使用styles.xml

(1)在res/values目录下新建一个style.xml,增加<resource>根节点

<?xml version="1.0" encoding="utf-8"?> <resources> <style name="SpecialText" parent="@style/Text"> <item name="android:textSize">18sp</item> <item name="android:textColor">#008</item> </style> <style name="button_style"> <item name="android:textStyle">bold</item> <item name="android:textColor">#FFFFFFFF</item> <item name="android:layout_width">100.0dip</item>
</style> </resources>

4.自定义按钮显示效果

(1)在drawable中创建新的xml文件--mybutton.xml文件。

<item android:state_window_focused="false" android:drawable="@color/transparent" />

<!-- Even though these two point to the same resource, have two states so the drawable will invalidate itself when coming out of pressed state. 注意这句话-->

<item android:state_focused="true" android:state_enabled="false"
android:state_pressed
="true"
android:drawable
="@drawable/selector_background_disabled" />
<item android:state_focused="true" android:state_enabled="false"
android:drawable
="@drawable/lselector_background_disabled" />

<item android:state_focused="true" android:state_pressed="true"
android:drawable
="@drawable/selector_background_transition" />
<item android:state_focused="false" android:state_pressed="true"
android:drawable
="@drawable/selector_background_transition" />

<item android:state_focused="true"
android:drawable
="@drawable/selector_background_focus" />

</selector>

(2)在构造的layout中引用这个xml

<ImageButton
android:id
="@+id/ImageButton01"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:background
="@drawable/mybutton">
</ImageButton>

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