thanks :-)
this makes it all...... somewhat clear!
It depends :)
A LinearLayout has a major and a minor axis. The major axis is the one
that corresponds to the orientation of the LinearLayout. The
android:gravity attribute of a LinearLayout applies only to the major
axis and applies to all of the children as one group. For instance,
you can use android:gravity="center_horizontal" to center horizontally
all of the children of a horizontal LinearLayout. The
android:layout_gravity applies to the minor axis and affects one child
at a time. For instance, android:layout_gravity="bottom" would work in
a horizontal LinearLayout but NOT in a vertical LinearLayout.
In a RelativeLayout you can use android:gravity to affect the position
of all of the children at once, either horizontally or vertically. If
you want to move only one child at a time, use the various
android:layout_* attribute offered by RelativeLayout.LayoutParams.
If nothing is working for you, open HierarchyViewer and look at the
bounds of each container. Do you even have enough space to actually do
any centering? For instance, if your layouts are all using
wrap_content for their height and you try to center things vertically,
chances are it won't work, since there won't be space left in which to
center the children.
On Wed, Feb 3, 2010 at 5:51 PM, Jason Proctor
<[email protected]> wrote:
i have a LinearLayout with some dynamically shown/hidden items, and i'm
trying to centre it horizontally in a RelativeLayout or LinearLayout.
seems like there are more than a few ways of specifying alignment and
centring etc. i've tried layout_centerHorizontal and layout_gravity,
nothing's working.
which is the correct incantation for this case?
thanks much
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