Custom Attributes in Android

Question

I'm trying to create a custom attribute called Tag for all editable elements. I added the following to attrs.xml

<declare-styleable name="Spinner">     <attr name="tag" format="string" /> </declare-styleable>  <declare-styleable name="EditText">     <attr name="tag" format="string" /> </declare-styleable> 

I get an error saying "Attribute tag has already been defined" for the EditText. Is it not possible to create a custom attribute of the same name on different elements?

Answer 1

If you are going to use an attr in more than one place then put it in the root element inside the <resources> element like the following :

<resources>      <attr name="tag" format="string" />      <declare-styleable name="Spinner">         <attr name="tag" />     </declare-styleable>      <declare-styleable name="EditText">         <attr name="tag" />     </declare-styleable>  </resources> 

Now you can use the tag attribute in anywhere you want inside this xml file .

Hope That Helps.

Answer 2

See if my detailed answer about custom attributes helps: Defining custom attrs