[ProgressIndicator] Fixed that the wavy path isn't cached correctly when initializing with 0 progress.

PiperOrigin-RevId: 648845270

Author: pekingme

lib/java/com/google/android/material/progressindicator/CircularDrawingDelegate.java

@@ -326,6 +326,12 @@ private void drawArc(
         center.moveAcross(-adjustedRadius);
       } else {
         float centerDistance = centerDegree / 360 * activePathMeasure.getLength() / 2;
+        float amplitude = displayedAmplitude * amplitudeFraction;
+        if (adjustedRadius != cachedRadius || amplitude != cachedAmplitude) {
+          cachedAmplitude = amplitude;
+          cachedRadius = adjustedRadius;
+          invalidateCachedPaths();
+        }
         activePathMeasure.getPosTan(centerDistance, center.posVec, center.tanVec);
       }
       paint.setStyle(Style.FILL);
@@ -509,10 +515,10 @@ private Pair<PathPoint, PathPoint> getDisplayedPath(
       float span,
       float amplitudeFraction,
       float phaseFraction) {
+    float amplitude = displayedAmplitude * amplitudeFraction;
     if (adjustedRadius != cachedRadius
-        || (pathMeasure == activePathMeasure
-            && displayedAmplitude * amplitudeFraction != cachedAmplitude)) {
-      cachedAmplitude = displayedAmplitude * amplitudeFraction;
+        || (pathMeasure == activePathMeasure && amplitude != cachedAmplitude)) {
+      cachedAmplitude = amplitude;
       cachedRadius = adjustedRadius;
       invalidateCachedPaths();
     }

lib/java/com/google/android/material/progressindicator/DeterminateDrawable.java

@@ -297,9 +297,9 @@ private void maybeStartAmplitudeAnimator(int level) {
     if (!baseSpec.hasWavyEffect()) {
       return;
     }
+    maybeInitializeAmplitudeAnimator();
     float newAmplitudeFraction = getAmplitudeFractionFromLevel(level);
     if (newAmplitudeFraction != targetAmplitudeFraction) {
-      maybeInitializeAmplitudeAnimator();
       if (amplitudeAnimator.isRunning()) {
         amplitudeAnimator.cancel();
       }
@@ -311,6 +311,8 @@ private void maybeStartAmplitudeAnimator(int level) {
         amplitudeInterpolator = amplitudeOffInterpolator;
         amplitudeAnimator.reverse();
       }
+    } else if (!amplitudeAnimator.isRunning()) {
+      setAmplitudeFraction(newAmplitudeFraction);
     }
   }