Based on here on XML Attributes section I specify following in my dimens.xml
:
<dimen name="match_parent">-1dp</dimen>
<dimen name="main_left_menu_user_account_width">@dimen/match_parent</dimen>
<dimen name="main_left_menu_user_account_height">@dimen/match_parent</dimen>
Then I use the both dimensions in my layout:
<ImageView
android:id="@+id/userAccountImage"
android:background="@drawable/user_account"
android:layout_width="@dimen/main_left_menu_user_account_width"
android:layout_height="@dimen/main_left_menu_user_account_height" />
Then, when I preview to Graphical Layout
, it complains:
You must supply a layout_width attribute.
You must supply a layout_height attribute.
Actually can I define a value equals to match_parent in dimens.xml
?
Update:
I also tried this but the preview still complains:
<dimen name="main_left_menu_user_account_width">-1dp</dimen>
<dimen name="main_left_menu_user_account_height">-1dp</dimen>
I successfully use wrap_content
(the Graphical Layout
doesn't complain at all):
<dimen name="wrap_content">-2dp</dimen>
<dimen name="main_right_menu_width">@dimen/wrap_content</dimen>
<dimen name="main_right_menu_height">@dimen/wrap_content</dimen>
Use this, it works for me
<dimen name="custom_wrap_content">-2px</dimen>
<dimen name="horizontal_border_height">@dimen /custom_wrap_content</dimen>
<dimen name="custom_match_parent">-1px</dimen>
<dimen name="vertical_border_height">@dimen /custom_match_parent</dimen>
And the Reason why match_parent
doesn't run. You cannot supply a build in keyword like match_parent
Edit: Use px
instead of dp
as suggested by Jarett Millard in the comments.