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ASE

1.定义控件样式。

步骤:

a.写样式。

格式:

<style name=string [parent=string]> Hwx value | string value | reference </style>

例子:

  <!--
      Base application theme, dependent on API level. This theme is replaced
      by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
  -->
  <style name="AppBaseTheme" parent="Theme.AppCompat.Light">
  
      <!--
          Theme customizations available in newer API levels can go in
          res/values-vXX/styles.xml, while customizations related to
          backward-compatibility can go here.
      -->
      
  </style>
  
  <!-- Application theme. -->
  
  <style name="AppTheme" parent="AppBaseTheme">
  
      <!-- All customizations that are NOT specific to a particular API-level can go here. -->
      
  </style>

b.控件上引用就行了。

格式:

style="@style/样式名"

2.ImageButton的设置透明度的问题。

【1】3.0以下版本,不支持setalpha, 且不支持在xml文件中设置android:alpha = "0.5"这种方法(如果xml中设置则一律是不透明的);

【2】3.0以下版本, 在xml中配置透明度,只能通过ARGB设置.,如background="#0123"

【3】3.0以下版本通过以下2种方式:

a:view.getBackground().setAlpha(255)这种方法设置;

b:通过这种方法设置时,xml中的view的background只能设置RGB,不能是ARGB的格式

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