Update the radius of the Slider RippleDrawable

PiperOrigin-RevId: 286239127

Author: cketcham

lib/java/com/google/android/material/drawable/DrawableUtils.java

@@ -96,13 +96,9 @@ public static AttributeSet parseDrawableXml(
   }
 
   @TargetApi(VERSION_CODES.LOLLIPOP)
-  public static void setRippleDrawableRadius(@Nullable Drawable drawable, int radius) {
-    if (!(drawable instanceof RippleDrawable)) {
-      return;
-    }
-
+  public static void setRippleDrawableRadius(@Nullable RippleDrawable drawable, int radius) {
     if (VERSION.SDK_INT >= VERSION_CODES.M) {
-      ((RippleDrawable) drawable).setRadius(radius);
+      drawable.setRadius(radius);
     } else {
       try {
         @SuppressLint("PrivateApi")

lib/java/com/google/android/material/slider/Slider.java

@@ -293,11 +293,10 @@ public Slider(@NonNull Context context, @Nullable AttributeSet attrs, int defSty
     activeTicksPaint.setStrokeWidth(trackHeight / 2.0f);
     activeTicksPaint.setStrokeCap(Cap.ROUND);
 
-    Drawable background = getBackground();
     if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
+      Drawable background = getBackground();
       if (background instanceof RippleDrawable) {
         ((RippleDrawable) background).setColor(haloColor);
-        DrawableUtils.setRippleDrawableRadius(background, haloRadius);
       }
       // Because the RippleDrawable can draw outside the bounds of the view, we can set the layer
       // type to hardware so we can use PorterDuffXfermode when drawing.
@@ -361,7 +360,7 @@ private void processAttributes(Context context, AttributeSet attrs, int defStyle
     label = parseLabelDrawable(context, a);
 
     setThumbRadius(a.getDimensionPixelSize(R.styleable.Slider_thumbRadius, 0));
-    haloRadius = a.getDimensionPixelSize(R.styleable.Slider_haloRadius, 0);
+    setHaloRadius(a.getDimensionPixelSize(R.styleable.Slider_haloRadius, 0));
 
     setThumbElevation(a.getDimension(R.styleable.Slider_thumbElevation, 0));
 
@@ -673,6 +672,12 @@ public int getHaloRadius() {
    */
   public void setHaloRadius(@IntRange(from = 0) @Dimension int radius) {
     haloRadius = radius;
+    if (VERSION.SDK_INT >= VERSION_CODES.LOLLIPOP) {
+      Drawable background = getBackground();
+      if (background instanceof RippleDrawable) {
+        DrawableUtils.setRippleDrawableRadius((RippleDrawable) background, haloRadius);
+      }
+    }
     postInvalidate();
   }