Fixed EdgeEffect drawn on non-RecordingCanvas

Fixes: 183079166

When the EdgeEffect was drawn on a non-RecordingCanvas, the
animation was never completed when using TYPE_STRETCH. Because
TYPE_STRETCH can only be applied to RecordingCanvas, the
animation ends immediately when drawn on a non-RecordingCanvas.

Test: manual, I53d59a3b3cd14be658d899ff41c1fa4b83a98a32
Change-Id: I29c04ff7e0aa3269c1b4e9e503dfa641195820a8

1 files changed, 9 insertions, 2 deletions

diff --git a/core/java/android/widget/EdgeEffect.java b/core/java/android/widget/EdgeEffect.java
index 5f55887d6019..d9cc3ee80da8 100644
--- a/core/java/android/widget/EdgeEffect.java
+++ b/core/java/android/widget/EdgeEffect.java
@@ -640,6 +640,12 @@ public class EdgeEffect {
                     mWidth,
                     mHeight
             );
+        } else {
+            // This is TYPE_STRETCH and drawing into a Canvas that isn't a Recording Canvas,
+            // so no effect can be shown. Just end the effect.
+            mState = STATE_IDLE;
+            mDistance = 0;
+            mVelocity = 0;
         }
 
         boolean oneLastFrame = false;
@@ -771,8 +777,9 @@ public class EdgeEffect {
      * considered at rest or false if it is still animating.
      */
     private boolean isAtEquilibrium() {
-        double displacement = mDistance * mHeight; // in pixels
-        return Math.abs(mVelocity) < VELOCITY_THRESHOLD
+        double displacement = mDistance * mHeight * LINEAR_STRETCH_INTENSITY; // in pixels
+        double velocity = mVelocity * LINEAR_STRETCH_INTENSITY;
+        return Math.abs(velocity) < VELOCITY_THRESHOLD
                 && Math.abs(displacement) < VALUE_THRESHOLD;
     }