RESTRICT AUTOMERGE Support UDFPS multi-stage enrollment am: aee9eaa9de (d1aa0c0f) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java

+1 −0

Original line number	Diff line number	Diff line
		@@ -210,6 +210,7 @@ public class UdfpsController implements DozeReceiver {
		}

		void onAcquiredGood() {
		Log.d(TAG, "onAcquiredGood");
		if (mEnrollHelper != null) {
		mEnrollHelper.animateIfLastStep();
		}

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsEnrollDrawable.java

+31 −30

Original line number	Diff line number	Diff line
		@@ -98,13 +98,13 @@ public class UdfpsEnrollDrawable extends UdfpsDrawable {
		}

		void onEnrollmentProgress(int remaining, int totalSteps) {
		if (mEnrollHelper.isCenterEnrollmentComplete()) {
		if (mEnrollHelper != null && !mEnrollHelper.isCenterEnrollmentStage()) {
		if (mAnimatorSet != null && mAnimatorSet.isRunning()) {
		mAnimatorSet.end();
		}

		final PointF point = mEnrollHelper.getNextGuidedEnrollmentPoint();

		if (mCurrentX != point.x \|\| mCurrentY != point.y) {
		final ValueAnimator x = ValueAnimator.ofFloat(mCurrentX, point.x);
		x.addUpdateListener(animation -> {
		mCurrentX = (float) animation.getAnimatedValue();
		@@ -121,8 +121,8 @@ public class UdfpsEnrollDrawable extends UdfpsDrawable {
		scale.setDuration(ANIM_DURATION);
		scale.addUpdateListener(animation -> {
		// Grow then shrink
		mCurrentScale = 1 +
		SCALE_MAX * (float) Math.sin((float) animation.getAnimatedValue());
		mCurrentScale = 1
		+ SCALE_MAX * (float) Math.sin((float) animation.getAnimatedValue());
		invalidateSelf();
		});

		@@ -134,6 +134,7 @@ public class UdfpsEnrollDrawable extends UdfpsDrawable {
		mAnimatorSet.start();
		}
		}
		}

		@Override
		public void draw(@NonNull Canvas canvas) {
		@@ -142,7 +143,7 @@ public class UdfpsEnrollDrawable extends UdfpsDrawable {
		}

		// Draw moving target
		if (mEnrollHelper.isCenterEnrollmentComplete()) {
		if (mEnrollHelper != null && !mEnrollHelper.isCenterEnrollmentStage()) {
		canvas.save();
		canvas.translate(mCurrentX, mCurrentY);

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsEnrollHelper.java

+53 −12

Original line number	Diff line number	Diff line
		@@ -44,8 +44,15 @@ public class UdfpsEnrollHelper {
		private static final String NEW_COORDS_OVERRIDE =
		"com.android.systemui.biometrics.UdfpsNewCoords";

		// Enroll with two center touches before going to guided enrollment
		private static final int NUM_CENTER_TOUCHES = 2;
		static final int ENROLL_STAGE_COUNT = 4;

		// TODO(b/198928407): Consolidate with FingerprintEnrollEnrolling
		private static final int[] STAGE_THRESHOLDS = new int[] {
		2, // center
		18, // guided
		22, // fingertip
		38, // edges
		};

		interface Listener {
		void onEnrollmentProgress(int remaining, int totalSteps);
		@@ -65,6 +72,8 @@ public class UdfpsEnrollHelper {
		// interface makes no promises about monotonically increasing by one each time.
		private int mLocationsEnrolled = 0;

		private int mCenterTouchCount = 0;

		@Nullable Listener mListener;

		public UdfpsEnrollHelper(@NonNull Context context, int reason) {
		@@ -117,17 +126,43 @@ public class UdfpsEnrollHelper {
		}
		}

		static int getStageThreshold(int index) {
		return STAGE_THRESHOLDS[index];
		}

		static int getLastStageThreshold() {
		return STAGE_THRESHOLDS[ENROLL_STAGE_COUNT - 1];
		}

		boolean shouldShowProgressBar() {
		return mEnrollReason == IUdfpsOverlayController.REASON_ENROLL_ENROLLING;
		}

		void onEnrollmentProgress(int remaining) {
		if (mTotalSteps == -1) {
		mTotalSteps = remaining;
		}
		Log.d(TAG, "onEnrollmentProgress: remaining = " + remaining
		+ ", mRemainingSteps = " + mRemainingSteps
		+ ", mTotalSteps = " + mTotalSteps
		+ ", mLocationsEnrolled = " + mLocationsEnrolled
		+ ", mCenterTouchCount = " + mCenterTouchCount);

		if (remaining != mRemainingSteps) {
		mLocationsEnrolled++;
		if (isCenterEnrollmentStage()) {
		mCenterTouchCount++;
		}
		}

		if (mTotalSteps == -1) {
		mTotalSteps = remaining;

		// Allocate (or subtract) any extra steps for the first enroll stage.
		final int extraSteps = mTotalSteps - getLastStageThreshold();
		if (extraSteps != 0) {
		for (int stageIndex = 0; stageIndex < ENROLL_STAGE_COUNT; stageIndex++) {
		STAGE_THRESHOLDS[stageIndex] =
		Math.max(0, STAGE_THRESHOLDS[stageIndex] + extraSteps);
		}
		}
		}

		mRemainingSteps = remaining;
		@@ -152,19 +187,24 @@ public class UdfpsEnrollHelper {
		}
		}

		boolean isCenterEnrollmentComplete() {
		boolean isCenterEnrollmentStage() {
		if (mTotalSteps == -1 \|\| mRemainingSteps == -1) {
		return false;
		} else if (mAccessibilityEnabled) {
		return true;
		}
		return mTotalSteps - mRemainingSteps < STAGE_THRESHOLDS[0];
		}

		boolean isGuidedEnrollmentStage() {
		if (mAccessibilityEnabled \|\| mTotalSteps == -1 \|\| mRemainingSteps == -1) {
		return false;
		}
		final int stepsEnrolled = mTotalSteps - mRemainingSteps;
		return stepsEnrolled >= NUM_CENTER_TOUCHES;
		final int progressSteps = mTotalSteps - mRemainingSteps;
		return progressSteps >= STAGE_THRESHOLDS[0] && progressSteps < STAGE_THRESHOLDS[1];
		}

		@NonNull
		PointF getNextGuidedEnrollmentPoint() {
		if (mAccessibilityEnabled) {
		if (mAccessibilityEnabled \|\| !isGuidedEnrollmentStage()) {
		return new PointF(0f, 0f);
		}

		@@ -174,13 +214,14 @@ public class UdfpsEnrollHelper {
		SCALE_OVERRIDE, SCALE,
		UserHandle.USER_CURRENT);
		}
		final int index = mLocationsEnrolled - NUM_CENTER_TOUCHES;
		final int index = mLocationsEnrolled - mCenterTouchCount;
		final PointF originalPoint = mGuidedEnrollmentPoints
		.get(index % mGuidedEnrollmentPoints.size());
		return new PointF(originalPoint.x * scale, originalPoint.y * scale);
		}

		void animateIfLastStep() {
		Log.d(TAG, "animateIfLastStep: mRemainingSteps = " + mRemainingSteps);
		if (mListener == null) {
		Log.e(TAG, "animateIfLastStep, null listener");
		return;

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsEnrollProgressBarDrawable.java

+65 −99

Original line number	Diff line number	Diff line
		@@ -16,141 +16,107 @@

		package com.android.systemui.biometrics;

		import android.animation.ValueAnimator;
		import android.content.Context;
		import android.content.res.TypedArray;
		import android.graphics.Canvas;
		import android.graphics.ColorFilter;
		import android.graphics.Paint;
		import android.graphics.drawable.Drawable;
		import android.util.Log;
		import android.util.TypedValue;

		import androidx.annotation.NonNull;
		import androidx.annotation.Nullable;

		import com.android.systemui.R;
		import java.util.ArrayList;
		import java.util.List;

		/**
		* UDFPS enrollment progress bar.
		*/
		public class UdfpsEnrollProgressBarDrawable extends Drawable {
		private static final String TAG = "UdfpsProgressBar";

		private static final String TAG = "UdfpsEnrollProgressBarDrawable";
		private static final float SEGMENT_GAP_ANGLE = 12f;

		private static final float PROGRESS_BAR_THICKNESS_DP = 12;

		@NonNull private final Context mContext;
		@NonNull private final Paint mBackgroundCirclePaint;
		@NonNull private final Paint mProgressPaint;

		@Nullable private ValueAnimator mProgressAnimator;
		private float mProgress;
		private int mRotation; // After last step, rotate the progress bar once
		private boolean mLastStepAcquired;
		@NonNull private final List<UdfpsEnrollProgressBarSegment> mSegments;

		public UdfpsEnrollProgressBarDrawable(@NonNull Context context) {
		mContext = context;

		mBackgroundCirclePaint = new Paint();
		mBackgroundCirclePaint.setStrokeWidth(Utils.dpToPixels(context, PROGRESS_BAR_THICKNESS_DP));
		mBackgroundCirclePaint.setColor(context.getColor(R.color.white_disabled));
		mBackgroundCirclePaint.setAntiAlias(true);
		mBackgroundCirclePaint.setStyle(Paint.Style.STROKE);

		// Background circle color + alpha
		TypedArray tc = context.obtainStyledAttributes(
		new int[] {android.R.attr.colorControlNormal});
		int tintColor = tc.getColor(0, mBackgroundCirclePaint.getColor());
		mBackgroundCirclePaint.setColor(tintColor);
		tc.recycle();
		TypedValue alpha = new TypedValue();
		context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, alpha, true);
		mBackgroundCirclePaint.setAlpha((int) (alpha.getFloat() * 255));

		// Progress should not be color extracted
		mProgressPaint = new Paint();
		mProgressPaint.setStrokeWidth(Utils.dpToPixels(context, PROGRESS_BAR_THICKNESS_DP));
		mProgressPaint.setColor(context.getColor(R.color.udfps_enroll_progress));
		mProgressPaint.setAntiAlias(true);
		mProgressPaint.setStyle(Paint.Style.STROKE);
		mProgressPaint.setStrokeCap(Paint.Cap.ROUND);
		mSegments = new ArrayList<>(UdfpsEnrollHelper.ENROLL_STAGE_COUNT);
		float startAngle = SEGMENT_GAP_ANGLE / 2f;
		final float sweepAngle = (360f / UdfpsEnrollHelper.ENROLL_STAGE_COUNT) - SEGMENT_GAP_ANGLE;
		final Runnable invalidateRunnable = this::invalidateSelf;
		for (int index = 0; index < UdfpsEnrollHelper.ENROLL_STAGE_COUNT; index++) {
		mSegments.add(new UdfpsEnrollProgressBarSegment(context, getBounds(), startAngle,
		sweepAngle, SEGMENT_GAP_ANGLE, invalidateRunnable));
		startAngle += sweepAngle + SEGMENT_GAP_ANGLE;
		}
		}

		void setEnrollmentProgress(int remaining, int totalSteps) {
		// Add one so that the first steps actually changes progress, but also so that the last
		// step ends at 1.0
		final float progress = (totalSteps - remaining + 1) / (float) (totalSteps + 1);
		setEnrollmentProgress(progress);
		if (remaining == totalSteps) {
		// Show some progress for the initial touch.
		setEnrollmentProgress(1);
		} else {
		setEnrollmentProgress(totalSteps - remaining);
		}

		private void setEnrollmentProgress(float progress) {
		if (mLastStepAcquired) {
		return;
		}

		long animationDuration = 150;

		if (progress == 1.f) {
		animationDuration = 400;
		final ValueAnimator rotationAnimator = ValueAnimator.ofInt(0, 400);
		rotationAnimator.setDuration(animationDuration);
		rotationAnimator.addUpdateListener(animation -> {
		Log.d(TAG, "Rotation: " + mRotation);
		mRotation = (int) animation.getAnimatedValue();
		invalidateSelf();
		});
		rotationAnimator.start();
		private void setEnrollmentProgress(int progressSteps) {
		Log.d(TAG, "setEnrollmentProgress: progressSteps = " + progressSteps);

		int segmentIndex = 0;
		int prevThreshold = 0;
		while (segmentIndex < mSegments.size()) {
		final UdfpsEnrollProgressBarSegment segment = mSegments.get(segmentIndex);
		final int threshold = UdfpsEnrollHelper.getStageThreshold(segmentIndex);

		if (progressSteps >= threshold && !segment.isFilledOrFilling()) {
		Log.d(TAG, "setEnrollmentProgress: segment[" + segmentIndex + "] complete");
		segment.updateProgress(1f);
		break;
		} else if (progressSteps >= prevThreshold && progressSteps < threshold) {
		final int relativeSteps = progressSteps - prevThreshold;
		final int relativeThreshold = threshold - prevThreshold;
		final float segmentProgress = (float) relativeSteps / (float) relativeThreshold;
		Log.d(TAG, "setEnrollmentProgress: segment[" + segmentIndex + "] progress = "
		+ segmentProgress);
		segment.updateProgress(segmentProgress);
		break;
		}

		if (mProgressAnimator != null && mProgressAnimator.isRunning()) {
		mProgressAnimator.cancel();
		segmentIndex++;
		prevThreshold = threshold;
		}

		mProgressAnimator = ValueAnimator.ofFloat(mProgress, progress);
		mProgressAnimator.setDuration(animationDuration);
		mProgressAnimator.addUpdateListener(animation -> {
		mProgress = (float) animation.getAnimatedValue();
		invalidateSelf();
		});
		mProgressAnimator.start();
		if (progressSteps >= UdfpsEnrollHelper.getLastStageThreshold()) {
		Log.d(TAG, "setEnrollmentProgress: startCompletionAnimation");
		for (final UdfpsEnrollProgressBarSegment segment : mSegments) {
		segment.startCompletionAnimation();
		}
		} else {
		Log.d(TAG, "setEnrollmentProgress: cancelCompletionAnimation");
		for (final UdfpsEnrollProgressBarSegment segment : mSegments) {
		segment.cancelCompletionAnimation();
		}
		}
		}

		void onLastStepAcquired() {
		setEnrollmentProgress(1.f);
		mLastStepAcquired = true;
		Log.d(TAG, "setEnrollmentProgress: onLastStepAcquired");
		setEnrollmentProgress(UdfpsEnrollHelper.getLastStageThreshold());
		}

		@Override
		public void draw(@NonNull Canvas canvas) {
		Log.d(TAG, "setEnrollmentProgress: draw");

		canvas.save();

		// Progress starts from the top, instead of the right
		canvas.rotate(-90 + mRotation, getBounds().centerX(), getBounds().centerY());

		// Progress bar "background track"
		final float halfPaddingPx = Utils.dpToPixels(mContext, PROGRESS_BAR_THICKNESS_DP) / 2;
		canvas.drawArc(halfPaddingPx,
		halfPaddingPx,
		getBounds().right - halfPaddingPx,
		getBounds().bottom - halfPaddingPx,
		0,
		360,
		false,
		mBackgroundCirclePaint
		);

		final float progress = 360.f * mProgress;
		// Progress
		canvas.drawArc(halfPaddingPx,
		halfPaddingPx,
		getBounds().right - halfPaddingPx,
		getBounds().bottom - halfPaddingPx,
		0,
		progress,
		false,
		mProgressPaint
		);
		canvas.rotate(-90f, getBounds().centerX(), getBounds().centerY());

		// Draw each of the enroll segments.
		for (final UdfpsEnrollProgressBarSegment segment : mSegments) {
		segment.draw(canvas);
		}

		canvas.restore();
		}

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsEnrollProgressBarSegment.java

0 → 100644

+256 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2021 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.systemui.biometrics;

		import android.animation.ValueAnimator;
		import android.content.Context;
		import android.content.res.TypedArray;
		import android.graphics.Canvas;
		import android.graphics.Paint;
		import android.graphics.Rect;
		import android.os.Handler;
		import android.os.Looper;
		import android.util.Log;
		import android.util.TypedValue;

		import androidx.annotation.ColorInt;
		import androidx.annotation.NonNull;
		import androidx.annotation.Nullable;

		import com.android.systemui.R;

		/**
		* A single segment of the UDFPS enrollment progress bar.
		*/
		public class UdfpsEnrollProgressBarSegment {
		private static final String TAG = "UdfpsProgressBarSegment";

		private static final long PROGRESS_ANIMATION_DURATION_MS = 400L;
		private static final long OVER_SWEEP_ANIMATION_DELAY_MS = 200L;
		private static final long OVER_SWEEP_ANIMATION_DURATION_MS = 200L;

		private static final float STROKE_WIDTH_DP = 12f;

		private final Handler mHandler = new Handler(Looper.getMainLooper());

		@NonNull private final Rect mBounds;
		@NonNull private final Runnable mInvalidateRunnable;
		private final float mStartAngle;
		private final float mSweepAngle;
		private final float mMaxOverSweepAngle;
		private final float mStrokeWidthPx;

		@NonNull private final Paint mBackgroundPaint;
		@NonNull private final Paint mProgressPaint;

		private boolean mIsFilledOrFilling = false;

		private float mProgress = 0f;
		@Nullable private ValueAnimator mProgressAnimator;
		@NonNull private final ValueAnimator.AnimatorUpdateListener mProgressUpdateListener;

		private float mOverSweepAngle = 0f;
		@Nullable private ValueAnimator mOverSweepAnimator;
		@Nullable private ValueAnimator mOverSweepReverseAnimator;
		@NonNull private final ValueAnimator.AnimatorUpdateListener mOverSweepUpdateListener;
		@NonNull private final Runnable mOverSweepAnimationRunnable;

		public UdfpsEnrollProgressBarSegment(@NonNull Context context, @NonNull Rect bounds,
		float startAngle, float sweepAngle, float maxOverSweepAngle,
		@NonNull Runnable invalidateRunnable) {

		mBounds = bounds;
		mInvalidateRunnable = invalidateRunnable;
		mStartAngle = startAngle;
		mSweepAngle = sweepAngle;
		mMaxOverSweepAngle = maxOverSweepAngle;
		mStrokeWidthPx = Utils.dpToPixels(context, STROKE_WIDTH_DP);

		mBackgroundPaint = new Paint();
		mBackgroundPaint.setStrokeWidth(mStrokeWidthPx);
		mBackgroundPaint.setColor(context.getColor(R.color.white_disabled));
		mBackgroundPaint.setAntiAlias(true);
		mBackgroundPaint.setStyle(Paint.Style.STROKE);
		mBackgroundPaint.setStrokeCap(Paint.Cap.ROUND);

		// Background paint color + alpha
		final int[] attrs = new int[] {android.R.attr.colorControlNormal};
		final TypedArray ta = context.obtainStyledAttributes(attrs);
		@ColorInt final int tintColor = ta.getColor(0, mBackgroundPaint.getColor());
		mBackgroundPaint.setColor(tintColor);
		ta.recycle();
		TypedValue alpha = new TypedValue();
		context.getTheme().resolveAttribute(android.R.attr.disabledAlpha, alpha, true);
		mBackgroundPaint.setAlpha((int) (alpha.getFloat() * 255f));

		// Progress should not be color extracted
		mProgressPaint = new Paint();
		mProgressPaint.setStrokeWidth(mStrokeWidthPx);
		mProgressPaint.setColor(context.getColor(R.color.udfps_enroll_progress));
		mProgressPaint.setAntiAlias(true);
		mProgressPaint.setStyle(Paint.Style.STROKE);
		mProgressPaint.setStrokeCap(Paint.Cap.ROUND);

		mProgressUpdateListener = animation -> {
		mProgress = (float) animation.getAnimatedValue();
		mInvalidateRunnable.run();
		};

		mOverSweepUpdateListener = animation -> {
		mOverSweepAngle = (float) animation.getAnimatedValue();
		mInvalidateRunnable.run();
		};
		mOverSweepAnimationRunnable = () -> {
		if (mOverSweepAnimator != null && mOverSweepAnimator.isRunning()) {
		mOverSweepAnimator.cancel();
		}
		mOverSweepAnimator = ValueAnimator.ofFloat(mOverSweepAngle, mMaxOverSweepAngle);
		mOverSweepAnimator.setDuration(OVER_SWEEP_ANIMATION_DURATION_MS);
		mOverSweepAnimator.addUpdateListener(mOverSweepUpdateListener);
		mOverSweepAnimator.start();
		};
		}

		/**
		* Draws this segment to the given canvas.
		*/
		public void draw(@NonNull Canvas canvas) {
		Log.d(TAG, "draw: mProgress = " + mProgress);

		final float halfPaddingPx = mStrokeWidthPx / 2f;

		if (mProgress < 1f) {
		// Draw the unfilled background color of the segment.
		canvas.drawArc(
		halfPaddingPx,
		halfPaddingPx,
		mBounds.right - halfPaddingPx,
		mBounds.bottom - halfPaddingPx,
		mStartAngle,
		mSweepAngle,
		false /* useCenter */,
		mBackgroundPaint);
		}

		if (mProgress > 0f) {
		// Draw the filled progress portion of the segment.
		canvas.drawArc(
		halfPaddingPx,
		halfPaddingPx,
		mBounds.right - halfPaddingPx,
		mBounds.bottom - halfPaddingPx,
		mStartAngle,
		mSweepAngle * mProgress + mOverSweepAngle,
		false /* useCenter */,
		mProgressPaint);
		}
		}

		/**
		* @return Whether this segment is filled or in the process of being filled.
		*/
		public boolean isFilledOrFilling() {
		return mIsFilledOrFilling;
		}

		/**
		* Updates the fill progress of this segment, animating if necessary.
		*
		* @param progress The new fill progress, in the range [0, 1].
		*/
		public void updateProgress(float progress) {
		updateProgress(progress, PROGRESS_ANIMATION_DURATION_MS);
		}

		private void updateProgress(float progress, long animationDurationMs) {
		Log.d(TAG, "updateProgress: progress = " + progress
		+ ", duration = " + animationDurationMs);

		if (mProgress == progress) {
		Log.d(TAG, "updateProgress skipped: progress == mProgress");
		return;
		}

		mIsFilledOrFilling = progress >= 1f;

		if (mProgressAnimator != null && mProgressAnimator.isRunning()) {
		mProgressAnimator.cancel();
		}

		mProgressAnimator = ValueAnimator.ofFloat(mProgress, progress);
		mProgressAnimator.setDuration(animationDurationMs);
		mProgressAnimator.addUpdateListener(mProgressUpdateListener);
		mProgressAnimator.start();
		}

		/**
		* Queues and runs the completion animation for this segment.
		*/
		public void startCompletionAnimation() {
		final boolean hasCallback = mHandler.hasCallbacks(mOverSweepAnimationRunnable);
		if (hasCallback \|\| mOverSweepAngle >= mMaxOverSweepAngle) {
		Log.d(TAG, "startCompletionAnimation skipped: hasCallback = " + hasCallback
		+ ", mOverSweepAngle = " + mOverSweepAngle);
		return;
		}

		Log.d(TAG, "startCompletionAnimation: mProgress = " + mProgress
		+ ", mOverSweepAngle = " + mOverSweepAngle);

		// Reset sweep angle back to zero if the animation is being rolled back.
		if (mOverSweepReverseAnimator != null && mOverSweepReverseAnimator.isRunning()) {
		mOverSweepReverseAnimator.cancel();
		mOverSweepAngle = 0f;
		}

		// Start filling the segment if it isn't already.
		if (mProgress < 1f) {
		updateProgress(1f, OVER_SWEEP_ANIMATION_DELAY_MS);
		}

		// Queue the animation to run after fill completes.
		mHandler.postDelayed(mOverSweepAnimationRunnable, OVER_SWEEP_ANIMATION_DELAY_MS);
		}

		/**
		* Cancels (and reverses, if necessary) a queued or running completion animation.
		*/
		public void cancelCompletionAnimation() {
		Log.d(TAG, "cancelCompletionAnimation: mProgress = " + mProgress
		+ ", mOverSweepAngle = " + mOverSweepAngle);

		// Cancel the animation if it's queued or running.
		mHandler.removeCallbacks(mOverSweepAnimationRunnable);
		if (mOverSweepAnimator != null && mOverSweepAnimator.isRunning()) {
		mOverSweepAnimator.cancel();
		}

		// Roll back the animation if it has at least partially run.
		if (mOverSweepAngle > 0f) {
		if (mOverSweepReverseAnimator != null && mOverSweepReverseAnimator.isRunning()) {
		mOverSweepReverseAnimator.cancel();
		}

		final float completion = mOverSweepAngle / mMaxOverSweepAngle;
		final long proratedDuration = (long) (OVER_SWEEP_ANIMATION_DURATION_MS * completion);
		mOverSweepReverseAnimator = ValueAnimator.ofFloat(mOverSweepAngle, 0f);
		mOverSweepReverseAnimator.setDuration(proratedDuration);
		mOverSweepReverseAnimator.addUpdateListener(mOverSweepUpdateListener);
		mOverSweepReverseAnimator.start();
		}
		}
		}