Re: [android-developers] Layouts - Using Remaining Space For Intermediate View

Could you use a LinearLayout and set the layout_weight of each custom view to 1?

-Erik

On Monday, April 30, 2012 4:10:33 AM UTC-7, JTeagle wrote:

>This should work so long as Widget 1 and Widget 3 have knowable
>heights (e.g., Button, not ListView) and there is still room on the
>screen for Widget 2.

Thanks for this. I see where you're going with it, but unfortunately that
won't help my situation - and that's my fault for not making my example
clearer. Although I only specified three widgets / views, there could
potentially be more, and more than one view that would want to grab as much
space as possible.

Consider the following revised example:

Widget 1 - natural height
Custom View A - largest height possible
Widget 2 - natural height
Custom View B - largest height possible
Widget 3 - natural height
Custom View C - largest height possible
Widget 4 - natural height

Although widgets 1 and 4 could still be aligned to top and bottom, the
problem now is how to position widgets 2 and 3 (we can't even use
CENTRE_IN_PARENT now, since view B is in the middle). Since we have three
views vying for the maximum space they can get, I would want them to each
grab a third of the remaining space (so equal weight). In other words, the
way a GridBagLayout would handle it in desktop Java.

I cannot assume the position (order) of any of the widgets or views, since
I'm trying to build a framework that allows me to add (from a higher layer
of code) controls of any type in any order, to suit multiple applications,
without that higher layer having to have knowledge of how that is achieved.
This mechanism is being translated into other languages / environments such
as desktop Java, C++ / MFC and C#. The abstracted layer will be [almost]
directly portable by referring to generic concepts, and this underlying
layer (unique to each platform) will deal with creating platform-specific
controls and laying them out as required.

(Controls are being added through code rather than XML, but I realise
alignments and positions would be equivalent no matter which is used - just
written differently.)

Do you perhaps know how to reliably measure actual height controls (at what
point in the code can I get this information - a notification handler?).

If so, can I manually resize the views at a later stage to fit (I assume I
can, and then simply call requestLayout() )?

Getting the measurements would be an alternative way to solve the problem.

Or am I looking at deriving my own layout manager?

--
Jason Teagle
jason.teagle@yahoo.co.uk

--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to android-developers@googlegroups.com
To unsubscribe from this group, send email to
android-developers+unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en