Fix omission of updates to child frames on Android

* java/org/gnu/emacs/EmacsView.java (onAttachedFromWindow):
Force a layout cycle rather than report exposure immediately.
(prepareForLayout): Delete function.

* java/org/gnu/emacs/EmacsWindow.java (mapWindow): Remove
redundant calls to prepareForLayout.

* src/androidterm.c (handle_one_android_event): Do not swap
buffers when exposure is registered by a frame only partially
updated.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/androidterm.c b/src/androidterm.c
index 837cc50bfa1..4561f2d1df3 100644
--- a/src/androidterm.c
+++ b/src/androidterm.c
@@ -1279,7 +1279,12 @@ handle_one_android_event (struct android_display_info *dpyinfo,
             {
               expose_frame (f, event->xexpose.x, event->xexpose.y,
                             event->xexpose.width, event->xexpose.height);
-              show_back_buffer (f);
+
+              /* Do not display the back buffer if F is yet being
+                 updated, as this might trigger premature bitmap
+                 reconfiguration.  */
+              if (FRAME_ANDROID_COMPLETE_P (f))
+                show_back_buffer (f);
             }
         }