Android apply a theme on a custom item

问题

i am able to declare a theme and a specific button design:

<style name="MyTheme" parent="android:style/Theme.Black">
  <item name="android:buttonStyle">@style/Button.b1</item>
</style>

<style name="Button.b1" parent="android:style/Widget.Button">
    <item name="android:textColor">#000000</item>
</style>

The problem is that this style is applied to all buttons. I would like to declare a specific button with his own style changing each theme independent of the other buttons (something like a "save"-button). Any idea?

I tried the following:

<style name="Button.MyButton" parent="android:style/Widget.Button">
  <item name="android:background">@drawable/shape</item>
</style>

 <style name ="Button.MyButton.Theme1">
     <item name="android:textColor">#000000</item>
  </style>

 <style name ="Button.MyButton.Theme2">
     <item name="android:textColor">#FFFFFF</item>
  </style>

 <Button
     android:id="@+id/save_button" 
     android:layout_width="0px" 
     style="@style/Button.MyButton"
     android:layout_weight="1"
     android:layout_height="wrap_content"
     android:text="@string/save"/>

Now the button is independent from the theme, but it should also apply the style attribute that I declared above. At the moment it only applies the attributes that are declared in the MyButton scope and not these in MyButton.Theme1 or MyButton.Theme2.

回答1:

If your theme MyTheme is used only to define the button style, remove it; also remove the parent property from the button:

<style name="Button.b1">
    <item name="android:textColor">#000000</item>
</style>

Then in the layout, use the style only for those button you need to, like below:

 <Button
         android:id="@+id/btn_custom"
         style="@style/Button.b1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" >
 </Button>

回答2:

You can remove MyTheme declaration from your styles.xml and easily set @style/Button.b1 in the android:style property of your button of choice :)

edit: I think I finally got what you're asking for. I've no tried myself but it should work:

<!-- Declare your themes here -->
<style name="Theme1" parent="android:style/Theme.Black"></style>
<style name="Theme2" parent="android:style/Theme.Black"></style>

<!-- Declare your "abstract" Button style -->
<style name="MyButton" parent="android:style/Widget.Button">
  <item name="android:background">@drawable/shape</item>
</style>

<!-- Override MyButton style for Theme1 -->
<style name ="Theme1.MyButton" parent="@style/MyButton">
  <item name="android:textColor">#000000</item>
</style>

<!-- Override MyButton style for Theme2 -->
<style name ="Theme2.MyButton" parent="@style/MyButton">
  <item name="android:textColor">#FFFFFF</item>
</style>

回答3:

You should use your Button.b1 style directly only for those buttons you want to be styled that way. Use those buttons' android:style property:

android:style="Button.b1"

来源：https://stackoverflow.com/questions/10295430/android-apply-a-theme-on-a-custom-item

标签

android

styles

themes