I've discovered a long time ago that when it comes to Android, not everything works as it should :)
On Wednesday, June 5, 2013 1:28:18 PM UTC+3, Dusk Jockeys Android Apps wrote: > > Thanks, Piren. > > > Unfortunately none of that helps, as sometimes you really need things to > work as they should. In my case it is A and B that are fixed, and C has to > depend on them. > > I resorted to messing about with Font Metrics, working out manual > displacements based on font size, which is pretty messy. Honestly I don’t > see why this should be a dependency issue, when > > layout_alignBottom which does exactly the same thing (but without the > vertical offset) works fine, C happily sits above B if B is aligned to A's > bottom, rather than its baseline. > > > > However, that led me to find a little quirk, if you align B to A using > simultaneous layout_alignBottom and layout_alignBaseline flags, then C’s > positioning now works, it happily sits above B exactly as if just > layout_alignBottom was being used, although B is still aligned to A’s > baseline. The caveat is that C’s positioning is sligthty lower than normal; > it behaves as if the B is aligned to A’s bottom, then C is positioned, and > then B is realigned to A’s baseline, without C changing position. However I > can get round that with some margin offsets, and at least it can be done > via XML. > > > On Tuesday, May 21, 2013 11:37:51 PM UTC+8, Piren wrote: > >> I'm not too sure why this is happening... i'm guess that alignBaseline >> affects measuring differently and causes a cyclic dependency (Romain?) >> >> Try changing the relationships so you'll define A and B Below C instead, >> since C has a constant location anyhow. >> >> Also if your View hierarchy isnt too complex and wouldn't need to be >> refreshed too often, you can let yourself use more ViewGroups (use a >> linearlayout to divide the top and the bottom views)... Although that >> increases the amount of views you have and makes the rendering tree bigger, >> it will be easier for you to read the XML and understand the behavior and >> also prevent this weird behavior. >> >> On Tuesday, May 21, 2013 5:49:20 PM UTC+3, Dusk Jockeys Android Apps >> wrote: >>> >>> I have a layout issue which it seems should be simple to do in a >>> RelativeLayout. >>> >>> I have a view A, and a view B which is aligned to A's baseline, and >>> aligned to the right of the parent. B appears correctly. >>> >>> Then I want a view C to be directly above B, and also aligned to the >>> right of the parent. However, C never appears. >>> >>> However, if I change B to be aligned to the *bottom* of A, as >>> opposed to its *baseline*, then C appears. >>> >>> So it seems that layout_above doesn't like to act upon something that >>> references another view via layout_alignBaseline, but is fine acting upon >>> something that references another View via layout_alignBottom. >>> >>> Can anyone shed any light upon this? It seems like it is a common >>> scenario that should work. See the following. >>> >>> <?xml version="1.0" encoding="utf-8"?> >>> <RelativeLayout xmlns:android=" >>> http://schemas.android.com/apk/res/android"; >>> android:id="@+id/mainlayout" >>> android:layout_width="fill_parent" >>> android:layout_height="fill_parent" >>> android:orientation="vertical" > >>> <TextView >>> android:id="@+id/A" >>> android:layout_width="wrap_content" >>> android:layout_height="wrap_content" >>> android:text="A" >>> android:textColor="@android:color/white" >>> android:textSize="182dp" /> >>> <TextView >>> android:id="@+id/B" >>> android:layout_width="wrap_content" >>> android:layout_height="wrap_content" >>> android:layout_alignBaseline="@id/A" >>> android:layout_alignParentRight="true" >>> android:text="B" >>> android:textColor="@android:color/white" >>> android:textSize="26dp" /> >>> <TextView >>> android:id="@+id/C" >>> android:layout_width="wrap_content" >>> android:layout_height="wrap_content" >>> android:layout_alignParentRight="true" >>> android:layout_above="@id/B" >>> android:text="C never appears!" >>> android:textColor="@android:color/white" >>> android:textSize="20dp" /> >>> </RelativeLayout> >>> >>> Regards, >>> James >>> >> -- -- 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+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
