[TimePicker] Prevent the accumulation of listeners in rotationAnimator

Resolves #3973

GIT_ORIGIN_REV_ID=1b09e58865abfdf91610da16919e7f4f28739c09
PiperOrigin-RevId: 634850525

lib/java/com/google/android/material/timepicker/ClockHandView.java

@@ -40,6 +40,7 @@
 import android.view.ViewConfiguration;
 import androidx.annotation.Dimension;
 import androidx.annotation.FloatRange;
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.Px;
 import com.google.android.material.animation.AnimationUtils;
@@ -56,7 +57,7 @@ class ClockHandView extends View {
  private static final int DEFAULT_ANIMATION_DURATION = 200;
  private final int animationDuration;
  private final TimeInterpolator animationInterpolator;
- private final ValueAnimator rotationAnimator = new ValueAnimator();
+ @NonNull private final ValueAnimator rotationAnimator = new ValueAnimator();
  private boolean animatingOnTouchUp;
  private float downX;
  private float downY;
@@ -133,6 +134,23 @@ public ClockHandView(Context context, @Nullable AttributeSet attrs, int defStyle
  scaledTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
  setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_NO);
  a.recycle();
+
+ initRotationAnimator();
+ }
+
+ private void initRotationAnimator() {
+ rotationAnimator.addUpdateListener(
+ animation -> {
+ float animatedValue = (float) animation.getAnimatedValue();
+ setHandRotationInternal(animatedValue, true);
+ });
+
+ rotationAnimator.addListener(new AnimatorListenerAdapter() {
+ @Override
+ public void onAnimationCancel(Animator animation) {
+ animation.end();
+ }
+ });
  }
 
  @Override
@@ -149,9 +167,7 @@ public void setHandRotation(@FloatRange(from = 0f, to = 360f) float degrees) {
  }
 
  public void setHandRotation(@FloatRange(from = 0f, to = 360f) float degrees, boolean animate) {
- if (rotationAnimator != null) {
- rotationAnimator.cancel();
- }
+ rotationAnimator.cancel();
 
  if (!animate) {
  setHandRotationInternal(degrees, false);
@@ -162,19 +178,6 @@ public void setHandRotation(@FloatRange(from = 0f, to = 360f) float degrees, boo
  rotationAnimator.setFloatValues(animationValues.first, animationValues.second);
  rotationAnimator.setDuration(animationDuration);
  rotationAnimator.setInterpolator(animationInterpolator);
- rotationAnimator.addUpdateListener(
- animation -> {
- float animatedValue = (float) animation.getAnimatedValue();
- setHandRotationInternal(animatedValue, true);
- });
-
- rotationAnimator.addListener(new AnimatorListenerAdapter() {
- @Override
- public void onAnimationCancel(Animator animation) {
- animation.end();
- }
- });
-
  rotationAnimator.start();
  }