commit c8d10e5ab94fa784ee423e8ae5562e88c5d57f8f
author Treehugger Robot <treehugger-gerrit@google.com> Wed May 06 18:42:28 2020 +0000
committer Gerrit Code Review <noreply-gerritcodereview@google.com> Wed May 06 18:42:28 2020 +0000
tree 80c3cf2bc34dc12c8df4cd03a06682f3189cb668
parent 553fcc0b0b11aa17805942d9624d89ee340914ea
parent f9c367fd9e03a584e6fb660f322745e96b97bc48

Merge "Bugfix: throw meaningful error message if creating MeteringPointFactory prematurely" into androidx-master-dev

camera/camera-view/src/main/java/androidx/camera/view/PreviewView.java

diff --git a/camera/camera-view/src/main/java/androidx/camera/view/PreviewView.java b/camera/camera-view/src/main/java/androidx/camera/view/PreviewView.java
index a816f44..96544c5 100644
--- a/camera/camera-view/src/main/java/androidx/camera/view/PreviewView.java
+++ b/camera/camera-view/src/main/java/androidx/camera/view/PreviewView.java
@@ -215,7 +215,8 @@
      */
     @NonNull
     public MeteringPointFactory createMeteringPointFactory(@NonNull CameraSelector cameraSelector) {
-        Preconditions.checkNotNull(mImplementation);
+        Preconditions.checkNotNull(mImplementation,
+                "Must set the Preview's surfaceProvider and bind it to a lifecycle first");
         return new PreviewViewMeteringPointFactory(getDisplay(), cameraSelector,
                 mImplementation.getResolution(), mPreviewTransform.getScaleType(), getWidth(),
                 getHeight());