commit c534e3bd5b4658ee1757bc448c6e3a31a27ef131
author Kunhung Li <kunhungli@google.com> Tue Jul 16 09:34:20 2019 +0800
committer Kunhung Li <kunhungli@google.com> Tue Jul 30 03:03:42 2019 +0000
tree 12b114b0e3e75825e52bddfbb67462233e30ffaa
parent dbf9ada7d8c0241e1eac6b5a1541b7e7ee82cc07

Fix UI disordered when starting activity in background

ViewPager can't get its actual height when updating in background.
Call super.onMeasure() at first to retrive child count and then call
setMeasuredDimension().

Bug: 135406087
Test: Manual test
Change-Id: I58430d01b324785d9d6f900d31791abf67ebceb2

src/com/android/wallpaper/livepicker/widget/ConstraintViewPager.java

diff --git a/src/com/android/wallpaper/livepicker/widget/ConstraintViewPager.java b/src/com/android/wallpaper/livepicker/widget/ConstraintViewPager.java
index 985cad6..f59b0b9 100644
--- a/src/com/android/wallpaper/livepicker/widget/ConstraintViewPager.java
+++ b/src/com/android/wallpaper/livepicker/widget/ConstraintViewPager.java
@@ -50,6 +50,8 @@
      */
     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
         int maxChildHeight = 0;
         int infoChildHeight = 0;
         int infoTopPadding = 0;
@@ -81,9 +83,6 @@
             }
         }
 
-        if (maxChildHeight != 0) {
-            heightMeasureSpec = MeasureSpec.makeMeasureSpec(maxChildHeight, MeasureSpec.EXACTLY);
-        }
-        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), maxChildHeight);
     }
 }