Description

A name-value pair for an item of additional, arbitrary data that can be supplied to the parent component. A component element can contain any number of <meta-data> subelements. The values from all of them are collected in a single Bundle object and made available to the component as the Packageltemlnfo.metaData field.

Ordinary values are specified through the value attribute. However, to assign a resource ID as the value, use the resource attribute instead. For example, the following code assigns whatever value is stored in the @string/kangaroo resource to the "zoo" name:

<meta-data android:name="zoo" android:value="@string/kangaroo" />

On the other hand, using the resource attribute would assign "zoo" the numeric ID of the resource, not the value stored in the resource:

<meta-data android:name="zoo" android:resource="@string/kangaroo" />

It is highly recommended that you avoid supplying related data as multiple separate <meta-data> entries. Instead, if you have complex data to associate with a component, store it as a resource and use the resource attribute to inform the component of its ID.

0 0

Post a comment