Reduce amount of unnecessary RippleDrawable mask redraw

Bug: 19638504
Change-Id: Ie7b639c543150e13aec30dfeca2b303d5b601cf3

2 files changed, 14 insertions, 7 deletions

diff --git a/graphics/java/android/graphics/drawable/RippleComponent.java b/graphics/java/android/graphics/drawable/RippleComponent.java
index 5ba2f93..aa2aa20 100644
--- a/graphics/java/android/graphics/drawable/RippleComponent.java
+++ b/graphics/java/android/graphics/drawable/RippleComponent.java
@@ -237,7 +237,7 @@ abstract class RippleComponent {
     }
 
     protected final void invalidateSelf() {
-        mOwner.invalidateSelf();
+        mOwner.invalidateSelf(false);
     }
 
     protected final boolean isHardwareAnimating() {
diff --git a/graphics/java/android/graphics/drawable/RippleDrawable.java b/graphics/java/android/graphics/drawable/RippleDrawable.java
index f7e8ed0..1af48ca 100644
--- a/graphics/java/android/graphics/drawable/RippleDrawable.java
+++ b/graphics/java/android/graphics/drawable/RippleDrawable.java
@@ -229,7 +229,7 @@ public class RippleDrawable extends LayerDrawable {
         mExitingRipplesCount = 0;
 
         // Always draw an additional "clean" frame after canceling animations.
-        invalidateSelf();
+        invalidateSelf(false);
     }
 
     @Override
@@ -364,7 +364,7 @@ public class RippleDrawable extends LayerDrawable {
      */
     public void setColor(ColorStateList color) {
         mState.mColor = color;
-        invalidateSelf();
+        invalidateSelf(false);
     }
 
     /**
@@ -376,7 +376,7 @@ public class RippleDrawable extends LayerDrawable {
      */
     public void setRadius(int radius) {
         mState.mMaxRadius = radius;
-        invalidateSelf();
+        invalidateSelf(false);
     }
 
     /**
@@ -477,7 +477,7 @@ public class RippleDrawable extends LayerDrawable {
     private void setTargetDensity(DisplayMetrics metrics) {
         if (mDensity != metrics.density) {
             mDensity = metrics.density;
-            invalidateSelf();
+            invalidateSelf(false);
         }
     }
 
@@ -684,10 +684,17 @@ public class RippleDrawable extends LayerDrawable {
 
     @Override
     public void invalidateSelf() {
+        invalidateSelf(true);
+    }
+
+    void invalidateSelf(boolean invalidateMask) {
         super.invalidateSelf();
 
-        // Force the mask to update on the next draw().
-        mHasValidMask = false;
+        if (invalidateMask) {
+            // Force the mask to update on the next draw().
+            mHasValidMask = false;
+        }
+
     }
 
     private void pruneRipples() {