I want to set some properties for the first ImageView element, and then inherit the properties in other elements.
The following does not work, but probably there is something similar?
<ImageView android:id="@+id/myimage" android:layout_height="100dp" android:layout_width="100dp"/> <ImageView android:id="@+id/myimage2" android:layout_height="@myimage/layout_height" android:layout_width="@myimage/layout_width"/> You can't do that in that way, but you have 2 options here:
Option 1: declare the value as a dimension and the use it:
Declare two values for height and width in dimens.xml that can be found at res/values.
<dimen name="image_width">100dp</dimen> <dimen name="image_height">100dp</dimen> Then use them in your xml like this:
<ImageView android:id="@+id/myimage2" android:layout_height="@dimen/image_height" android:layout_width="@dimen/image_width"/> Option 2: Create a style associated with your ImageView:
First thing to do is to create the style for your views and place it in styles.xml that can be found at res/values.
<style name="my_image_view_style"> <item name="android:layout_height">100dp</item> <item name="android:layout_width">100dp</item> </style> Add your created style to your ImageView:
<ImageView android:id="@+id/myimage2" style="@style/my_image_view_style"/> 
<style> looks promising. But trying to use it states "attribute is missing the android namespace". Where do I have to put those styles? In the same file, or in a different one?
styles.xml file in resources. I'll edit my answer to make it easier to understand.
dimens.xmlwhich will come underres>valuesand use that for whichever xml element you want<dimen name="myimageheight">100dp</dimen>along withandroid:layout_height="@dimens/myimageheight"(repeat this where needed).