[LoadingIndicator] Teach LoadingIndicatorDrawable to get the animator duration scale

Author: pubiqq

lib/java/com/google/android/material/loadingindicator/LoadingIndicator.java

@@ -74,7 +74,6 @@ public LoadingIndicator(
     drawable.setCallback(this);
 
     specs = drawable.getDrawingDelegate().specs;
-    setAnimatorDurationScaleProvider(new AnimatorDurationScaleProvider());
   }
 
   @Override

lib/java/com/google/android/material/loadingindicator/LoadingIndicatorDrawable.java

@@ -33,14 +33,14 @@
 
 /** This class draws the graphics for a loading indicator. */
 public final class LoadingIndicatorDrawable extends Drawable implements Drawable.Callback {
-  AnimatorDurationScaleProvider animatorDurationScaleProvider;
 
   @NonNull private final Context context;
   @NonNull private final LoadingIndicatorSpec specs;
   @NonNull private LoadingIndicatorDrawingDelegate drawingDelegate;
   @NonNull private LoadingIndicatorAnimatorDelegate animatorDelegate;
 
   @NonNull Paint paint;
+  @NonNull AnimatorDurationScaleProvider animatorDurationScaleProvider;
 
   @IntRange(from = 0, to = 255)
   int alpha;
@@ -68,6 +68,7 @@ public static LoadingIndicatorDrawable create(
     this.animatorDelegate = animatorDelegate;
 
     this.paint = new Paint();
+    this.animatorDurationScaleProvider = new AnimatorDurationScaleProvider();
 
     animatorDelegate.registerDrawable(this);
     setAlpha(255);
@@ -187,13 +188,9 @@ public void unscheduleDrawable(@NonNull Drawable who, @NonNull Runnable what) {
   // ******************* Utility functions *******************
 
   private boolean isSystemAnimatorDisabled() {
-    if (animatorDurationScaleProvider != null) {
-      float systemAnimatorDurationScale =
-          animatorDurationScaleProvider.getSystemAnimatorDurationScale(
-              context.getContentResolver());
-      return systemAnimatorDurationScale == 0;
-    }
-    return false;
+    float systemAnimatorDurationScale =
+        animatorDurationScaleProvider.getSystemAnimatorDurationScale(context.getContentResolver());
+    return systemAnimatorDurationScale == 0;
   }
 
   // ******************* Setter and getter *******************