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?

starball · Accepted Answer · 2022-12-25 01:04:55Z

70

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.

edited Dec 25, 2022 at 1:04

starball♦

60.9k55 gold badges334 silver badges1.1k bronze badges

answered Dec 31, 2010 at 7:00

ninjasense

13.9k19 gold badges79 silver badges93 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Community · Accepted Answer · 2017-05-23 11:50:32Z

5

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

edited May 23, 2017 at 11:50

CommunityBot

11 silver badge

answered Dec 31, 2010 at 8:47

Rich Schuler

42k6 gold badges75 silver badges59 bronze badges

Collectives™ on Stack Overflow

Custom Attributes in Android

2 Answers 2

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Linked

Related