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 [email protected] To unsubscribe from this group, send email to [email protected] 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 [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
