Add dwell-ripple

Dwell-ripple plays when the user has their fingerDown
on UDFPS.

Sample adb command:
  adb shell cmd statusbar auth-ripple dwellScale 2.5
  adb shell cmd statusbar auth-ripple dwellAlpha 1 150
  adb shell cmd statusbar auth-ripple dwellExpandedScale 3

Test: atest SystemUITests, manual
Bug: 198864174
Change-Id: Ib46ac67c8f7bd94563f8ea7aaa7415148a39eb00
(cherry picked from commit 3ad5b8bb1eab854d9229d06eca5645e3c3683f95)

5 files changed, 368 insertions, 30 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleController.kt b/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleController.kt
index 45ca7088cf4c..9c818fff5018 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleController.kt
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleController.kt
@@ -20,6 +20,7 @@ import android.content.Context
 import android.content.res.Configuration
 import android.graphics.PointF
 import android.hardware.biometrics.BiometricSourceType
+import android.util.Log
 import androidx.annotation.VisibleForTesting
 import com.android.keyguard.KeyguardUpdateMonitor
 import com.android.keyguard.KeyguardUpdateMonitorCallback
@@ -38,6 +39,7 @@ import com.android.systemui.statusbar.policy.ConfigurationController
 import com.android.systemui.util.ViewController
 import java.io.PrintWriter
 import javax.inject.Inject
+import javax.inject.Provider
 
 /***
  * Controls the ripple effect that shows when authentication is successful.
@@ -54,12 +56,18 @@ class AuthRippleController @Inject constructor(
     private val notificationShadeWindowController: NotificationShadeWindowController,
     private val bypassController: KeyguardBypassController,
     private val biometricUnlockController: BiometricUnlockController,
+    private val udfpsControllerProvider: Provider<UdfpsController>,
     rippleView: AuthRippleView?
 ) : ViewController<AuthRippleView>(rippleView) {
     var fingerprintSensorLocation: PointF? = null
     private var faceSensorLocation: PointF? = null
     private var circleReveal: LightRevealEffect? = null
 
+    private var udfpsController: UdfpsController? = null
+    private var dwellScale = 2f
+    private var expandedDwellScale = 2.5f
+    private var udfpsRadius: Float = -1f
+
     override fun onInit() {
         mView.setAlphaInDuration(sysuiContext.resources.getInteger(
                 R.integer.auth_ripple_alpha_in_duration).toLong())
@@ -67,9 +75,11 @@ class AuthRippleController @Inject constructor(
 
     @VisibleForTesting
     public override fun onViewAttached() {
+        authController.addCallback(authControllerCallback)
         updateRippleColor()
         updateSensorLocation()
-        authController.addCallback(authControllerCallback)
+        updateUdfpsDependentParams()
+        udfpsController?.addCallback(udfpsControllerCallback)
         configurationController.addCallback(configurationChangedListener)
         keyguardUpdateMonitor.registerCallback(keyguardUpdateMonitorCallback)
         commandRegistry.registerCommand("auth-ripple") { AuthRippleCommand() }
@@ -77,6 +87,7 @@ class AuthRippleController @Inject constructor(
 
     @VisibleForTesting
     public override fun onViewDetached() {
+        udfpsController?.removeCallback(udfpsControllerCallback)
         authController.removeCallback(authControllerCallback)
         keyguardUpdateMonitor.removeCallback(keyguardUpdateMonitorCallback)
         configurationController.removeCallback(configurationChangedListener)
@@ -94,18 +105,18 @@ class AuthRippleController @Inject constructor(
         if (biometricSourceType == BiometricSourceType.FINGERPRINT &&
             fingerprintSensorLocation != null) {
             mView.setSensorLocation(fingerprintSensorLocation!!)
-            showRipple()
+            showUnlockedRipple()
         } else if (biometricSourceType == BiometricSourceType.FACE &&
             faceSensorLocation != null) {
             if (!bypassController.canBypass()) {
                 return
             }
             mView.setSensorLocation(faceSensorLocation!!)
-            showRipple()
+            showUnlockedRipple()
         }
     }
 
-    private fun showRipple() {
+    private fun showUnlockedRipple() {
         notificationShadeWindowController.setForcePluginOpen(true, this)
         val biometricUnlockMode = biometricUnlockController.mode
         val useCircleReveal = circleReveal != null &&
@@ -117,7 +128,7 @@ class AuthRippleController @Inject constructor(
             lightRevealScrim?.revealEffect = circleReveal!!
         }
 
-        mView.startRipple(
+        mView.startUnlockedRipple(
             /* end runnable */
             Runnable {
                 notificationShadeWindowController.setForcePluginOpen(false, this)
@@ -152,7 +163,7 @@ class AuthRippleController @Inject constructor(
             Utils.getColorAttr(sysuiContext, android.R.attr.colorAccent).defaultColor)
     }
 
-    val keyguardUpdateMonitorCallback =
+    private val keyguardUpdateMonitorCallback =
         object : KeyguardUpdateMonitorCallback() {
             override fun onBiometricAuthenticated(
                 userId: Int,
@@ -161,9 +172,13 @@ class AuthRippleController @Inject constructor(
             ) {
                 showRipple(biometricSourceType)
             }
+
+        override fun onBiometricAuthFailed(biometricSourceType: BiometricSourceType?) {
+            mView.retractRipple()
+        }
     }
 
-    val configurationChangedListener =
+    private val configurationChangedListener =
         object : ConfigurationController.ConfigurationListener {
             override fun onConfigChanged(newConfig: Configuration?) {
                 updateSensorLocation()
@@ -179,14 +194,97 @@ class AuthRippleController @Inject constructor(
             }
     }
 
-    private val authControllerCallback = AuthController.Callback { updateSensorLocation() }
+    private val udfpsControllerCallback =
+        object : UdfpsController.Callback {
+            override fun onFingerDown() {
+                if (fingerprintSensorLocation == null) {
+                    Log.e("AuthRipple", "fingerprintSensorLocation=null onFingerDown. " +
+                            "Skip showing dwell ripple")
+                    return
+                }
+
+                mView.setSensorLocation(fingerprintSensorLocation!!)
+                mView.startDwellRipple(
+                        /* startRadius */ udfpsRadius,
+                        /* endRadius */ udfpsRadius * dwellScale,
+                        /* expandedRadius */ udfpsRadius * expandedDwellScale)
+            }
+
+            override fun onFingerUp() {
+                mView.retractRipple()
+            }
+        }
+
+    private val authControllerCallback = AuthController.Callback {
+        updateSensorLocation()
+        updateUdfpsDependentParams()
+    }
+
+    private fun updateUdfpsDependentParams() {
+        authController.udfpsProps?.let {
+            if (it.size > 0) {
+                udfpsRadius = it[0].sensorRadius.toFloat()
+                udfpsController = udfpsControllerProvider.get()
+
+                if (mView.isAttachedToWindow) {
+                    udfpsController?.addCallback(udfpsControllerCallback)
+                }
+            }
+        }
+    }
 
     inner class AuthRippleCommand : Command {
+        fun printDwellInfo(pw: PrintWriter) {
+            pw.println("dwell ripple: " +
+                    "\n\tsensorLocation=$fingerprintSensorLocation" +
+                    "\n\tdwellScale=$dwellScale" +
+                    "\n\tdwellAlpha=${mView.dwellAlpha}, " +
+                    "duration=${mView.dwellAlphaDuration}" +
+                    "\n\tdwellExpand=$expandedDwellScale" +
+                    "\n\t(crash systemui to reset to default)")
+        }
+
         override fun execute(pw: PrintWriter, args: List<String>) {
             if (args.isEmpty()) {
                 invalidCommand(pw)
             } else {
                 when (args[0]) {
+                    "dwellScale" -> {
+                        if (args.size > 1 && args[1].toFloatOrNull() != null) {
+                            dwellScale = args[1].toFloat()
+                            printDwellInfo(pw)
+                        } else {
+                            pw.println("expected float argument <dwellScale>")
+                        }
+                    }
+                    "dwellAlpha" -> {
+                        if (args.size > 2 && args[1].toFloatOrNull() != null &&
+                                args[2].toLongOrNull() != null) {
+                            mView.dwellAlpha = args[1].toFloat()
+                            if (args[2].toFloat() > 200L) {
+                                pw.println("alpha animation duration must be less than 200ms.")
+                            }
+                            mView.dwellAlphaDuration = kotlin.math.min(args[2].toLong(), 200L)
+                            printDwellInfo(pw)
+                        } else {
+                            pw.println("expected two float arguments:" +
+                                    " <dwellAlpha> <dwellAlphaDuration>")
+                        }
+                    }
+                    "dwellExpand" -> {
+                        if (args.size > 1 && args[1].toFloatOrNull() != null) {
+                            val expandedScale = args[1].toFloat()
+                            if (expandedScale <= dwellScale) {
+                                pw.println("invalid expandedScale. must be greater than " +
+                                        "dwellScale=$dwellScale, but given $expandedScale")
+                            } else {
+                                expandedDwellScale = expandedScale
+                            }
+                            printDwellInfo(pw)
+                        } else {
+                            pw.println("expected float argument <expandedScale>")
+                        }
+                    }
                     "fingerprint" -> {
                         pw.println("fingerprint ripple sensorLocation=$fingerprintSensorLocation")
                         showRipple(BiometricSourceType.FINGERPRINT)
@@ -205,7 +303,7 @@ class AuthRippleController @Inject constructor(
                         pw.println("custom ripple sensorLocation=" + args[1].toFloat() + ", " +
                             args[2].toFloat())
                         mView.setSensorLocation(PointF(args[1].toFloat(), args[2].toFloat()))
-                        showRipple()
+                        showUnlockedRipple()
                     }
                     else -> invalidCommand(pw)
                 }
@@ -215,6 +313,9 @@ class AuthRippleController @Inject constructor(
         override fun help(pw: PrintWriter) {
             pw.println("Usage: adb shell cmd statusbar auth-ripple <command>")
             pw.println("Available commands:")
+            pw.println("  dwellScale <200ms_scale: float>")
+            pw.println("  dwellAlpha <alpha: float> <duration : long>")
+            pw.println("  dwellExpand <expanded_scale: float>")
             pw.println("  fingerprint")
             pw.println("  face")
             pw.println("  custom <x-location: int> <y-location: int>")
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleView.kt b/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleView.kt
index 95d0afa10e8f..8e1303713171 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleView.kt
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/AuthRippleView.kt
@@ -26,7 +26,9 @@ import android.graphics.PointF
 import android.util.AttributeSet
 import android.view.View
 import android.view.animation.PathInterpolator
+import com.android.internal.R.attr.interpolator
 import com.android.internal.graphics.ColorUtils
+import com.android.systemui.animation.Interpolators
 import com.android.systemui.statusbar.LightRevealScrim
 import com.android.systemui.statusbar.charging.RippleShader
 
@@ -34,15 +36,28 @@ private const val RIPPLE_ANIMATION_DURATION: Long = 1533
 private const val RIPPLE_SPARKLE_STRENGTH: Float = 0.4f
 
 /**
- * Expanding ripple effect on the transition from biometric authentication success to showing
+ * Expanding ripple effect
+ * - startUnlockedRipple for the transition from biometric authentication success to showing
  * launcher.
+ * - startDwellRipple for the ripple expansion out when the user has their finger down on the UDFPS
+ * sensor area
+ * - retractRipple for the ripple animation inwards to signal a failure
  */
 class AuthRippleView(context: Context?, attrs: AttributeSet?) : View(context, attrs) {
+    private val retractInterpolator = PathInterpolator(.05f, .93f, .1f, 1f)
+    private val dwellPulseDuration = 200L
+    var dwellAlphaDuration = dwellPulseDuration
+    private val dwellExpandDuration = 1200L - dwellPulseDuration
+    private val retractDuration = 400L
+
+    var dwellAlpha: Float = .5f
     private var alphaInDuration: Long = 0
-    private var rippleInProgress: Boolean = false
+    private var unlockedRippleInProgress: Boolean = false
     private val rippleShader = RippleShader()
     private val ripplePaint = Paint()
-    private var radius: Float = 0.0f
+    private var retractAnimator: Animator? = null
+    private var dwellPulseOutAnimator: Animator? = null
+    private var radius: Float = 0f
         set(value) {
             rippleShader.radius = value
             field = value
@@ -63,21 +78,182 @@ class AuthRippleView(context: Context?, attrs: AttributeSet?) : View(context, at
 
     fun setSensorLocation(location: PointF) {
         origin = location
-        radius = maxOf(location.x, location.y, width - location.x, height - location.y)
-            .toFloat()
+        radius = maxOf(location.x, location.y, width - location.x, height - location.y).toFloat()
     }
 
     fun setAlphaInDuration(duration: Long) {
         alphaInDuration = duration
     }
 
-    fun startRipple(onAnimationEnd: Runnable?, lightReveal: LightRevealScrim?) {
-        if (rippleInProgress) {
+    /**
+     * Animate ripple inwards back to radius 0
+     */
+    fun retractRipple() {
+        if (retractAnimator?.isRunning == true) {
+            return // let the animation finish
+        }
+
+        if (dwellPulseOutAnimator?.isRunning == true) {
+            val retractRippleAnimator = ValueAnimator.ofFloat(rippleShader.progress, 0f)
+                    .apply {
+                interpolator = retractInterpolator
+                duration = retractDuration
+                addUpdateListener { animator ->
+                    val now = animator.currentPlayTime
+                    rippleShader.progress = animator.animatedValue as Float
+                    rippleShader.time = now.toFloat()
+
+                    invalidate()
+                }
+            }
+
+            val retractAlphaAnimator = ValueAnimator.ofInt(255, 0).apply {
+                interpolator = Interpolators.LINEAR
+                duration = retractDuration
+                addUpdateListener { animator ->
+                    rippleShader.color = ColorUtils.setAlphaComponent(
+                            rippleShader.color,
+                            animator.animatedValue as Int
+                    )
+                    invalidate()
+                }
+            }
+
+            retractAnimator = AnimatorSet().apply {
+                playTogether(retractRippleAnimator, retractAlphaAnimator)
+                addListener(object : AnimatorListenerAdapter() {
+                    override fun onAnimationStart(animation: Animator?) {
+                        dwellPulseOutAnimator?.cancel()
+                        rippleShader.shouldFadeOutRipple = false
+                        visibility = VISIBLE
+                    }
+
+                    override fun onAnimationEnd(animation: Animator?) {
+                        visibility = GONE
+                        resetRippleAlpha()
+                    }
+                })
+                start()
+            }
+        }
+    }
+
+    /**
+     * Ripple that moves animates from an outer ripple ring of
+     *      startRadius => endRadius => expandedRadius
+     */
+    fun startDwellRipple(startRadius: Float, endRadius: Float, expandedRadius: Float) {
+        if (unlockedRippleInProgress || dwellPulseOutAnimator?.isRunning == true) {
+            return
+        }
+
+        // we divide by 4 because the desired startRadius and endRadius is for the ripple's outer
+        // ring see RippleShader
+        val startDwellProgress = startRadius / radius / 4f
+        val endInitialDwellProgress = endRadius / radius / 4f
+        val endExpandDwellProgress = expandedRadius / radius / 4f
+
+        val pulseOutEndAlpha = (255 * dwellAlpha).toInt()
+        val expandDwellEndAlpha = kotlin.math.min((255 * (dwellAlpha + .25f)).toInt(), 255)
+        val dwellPulseOutRippleAnimator = ValueAnimator.ofFloat(startDwellProgress,
+                endInitialDwellProgress).apply {
+            interpolator = Interpolators.LINEAR_OUT_SLOW_IN
+            duration = dwellPulseDuration
+            addUpdateListener { animator ->
+                val now = animator.currentPlayTime
+                rippleShader.progress = animator.animatedValue as Float
+                rippleShader.time = now.toFloat()
+
+                invalidate()
+            }
+        }
+
+        val dwellPulseOutAlphaAnimator = ValueAnimator.ofInt(0, pulseOutEndAlpha).apply {
+            interpolator = Interpolators.LINEAR
+            duration = dwellAlphaDuration
+            addUpdateListener { animator ->
+                rippleShader.color = ColorUtils.setAlphaComponent(
+                        rippleShader.color,
+                        animator.animatedValue as Int
+                )
+                invalidate()
+            }
+        }
+
+        // slowly animate outwards until we receive a call to retractRipple or startUnlockedRipple
+        val expandDwellRippleAnimator = ValueAnimator.ofFloat(endInitialDwellProgress,
+                endExpandDwellProgress).apply {
+            interpolator = Interpolators.LINEAR_OUT_SLOW_IN
+            duration = dwellExpandDuration
+            addUpdateListener { animator ->
+                val now = animator.currentPlayTime
+                rippleShader.progress = animator.animatedValue as Float
+                rippleShader.time = now.toFloat()
+
+                invalidate()
+            }
+        }
+
+        val expandDwellAlphaAnimator = ValueAnimator.ofInt(pulseOutEndAlpha, expandDwellEndAlpha)
+                .apply {
+            interpolator = Interpolators.LINEAR
+            duration = dwellExpandDuration
+            addUpdateListener { animator ->
+                rippleShader.color = ColorUtils.setAlphaComponent(
+                        rippleShader.color,
+                        animator.animatedValue as Int
+                )
+                invalidate()
+            }
+        }
+
+        val initialDwellPulseOutAnimator = AnimatorSet().apply {
+            playTogether(dwellPulseOutRippleAnimator, dwellPulseOutAlphaAnimator)
+        }
+        val expandDwellAnimator = AnimatorSet().apply {
+            playTogether(expandDwellRippleAnimator, expandDwellAlphaAnimator)
+        }
+
+        dwellPulseOutAnimator = AnimatorSet().apply {
+            playSequentially(
+                    initialDwellPulseOutAnimator,
+                    expandDwellAnimator
+            )
+            addListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationStart(animation: Animator?) {
+                    retractAnimator?.cancel()
+                    rippleShader.shouldFadeOutRipple = false
+                    visibility = VISIBLE
+                }
+
+                override fun onAnimationEnd(animation: Animator?) {
+                    visibility = GONE
+                    resetRippleAlpha()
+                }
+            })
+            start()
+        }
+    }
+
+    /**
+     * Ripple that bursts outwards from the position of the sensor to the edges of the screen
+     */
+    fun startUnlockedRipple(onAnimationEnd: Runnable?, lightReveal: LightRevealScrim?) {
+        if (unlockedRippleInProgress) {
             return // Ignore if ripple effect is already playing
         }
 
-        val rippleAnimator = ValueAnimator.ofFloat(0f, 1f).apply {
-            interpolator = PathInterpolator(0f, 0f, .2f, 1f)
+        var rippleStart = 0f
+        var alphaDuration = alphaInDuration
+        if (dwellPulseOutAnimator?.isRunning == true || retractAnimator?.isRunning == true) {
+            rippleStart = rippleShader.progress
+            alphaDuration = 0
+            dwellPulseOutAnimator?.cancel()
+            retractAnimator?.cancel()
+        }
+
+        val rippleAnimator = ValueAnimator.ofFloat(rippleStart, 1f).apply {
+            interpolator = Interpolators.LINEAR_OUT_SLOW_IN
             duration = RIPPLE_ANIMATION_DURATION
             addUpdateListener { animator ->
                 val now = animator.currentPlayTime
@@ -97,7 +273,7 @@ class AuthRippleView(context: Context?, attrs: AttributeSet?) : View(context, at
         }
 
         val alphaInAnimator = ValueAnimator.ofInt(0, 255).apply {
-            duration = alphaInDuration
+            duration = alphaDuration
             addUpdateListener { animator ->
                 rippleShader.color = ColorUtils.setAlphaComponent(
                     rippleShader.color,
@@ -115,13 +291,14 @@ class AuthRippleView(context: Context?, attrs: AttributeSet?) : View(context, at
             )
             addListener(object : AnimatorListenerAdapter() {
                 override fun onAnimationStart(animation: Animator?) {
-                    rippleInProgress = true
+                    unlockedRippleInProgress = true
+                    rippleShader.shouldFadeOutRipple = true
                     visibility = VISIBLE
                 }
 
                 override fun onAnimationEnd(animation: Animator?) {
                     onAnimationEnd?.run()
-                    rippleInProgress = false
+                    unlockedRippleInProgress = false
                     visibility = GONE
                 }
             })
@@ -129,8 +306,16 @@ class AuthRippleView(context: Context?, attrs: AttributeSet?) : View(context, at
         animatorSet.start()
     }
 
+    fun resetRippleAlpha() {
+        rippleShader.color = ColorUtils.setAlphaComponent(
+                rippleShader.color,
+                255
+        )
+    }
+
     fun setColor(color: Int) {
         rippleShader.color = color
+        resetRippleAlpha()
     }
 
     override fun onDraw(canvas: Canvas?) {
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java b/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
index ac7a18a3fbd4..53fd9a3aa827 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
@@ -77,7 +77,9 @@ import com.android.systemui.statusbar.policy.KeyguardStateController;
 import com.android.systemui.util.concurrency.DelayableExecutor;
 import com.android.systemui.util.concurrency.Execution;
 
+import java.util.HashSet;
 import java.util.Optional;
+import java.util.Set;
 
 import javax.inject.Inject;
 
@@ -157,6 +159,7 @@ public class UdfpsController implements DozeReceiver {
     private Runnable mAodInterruptRunnable;
     private boolean mOnFingerDown;
     private boolean mAttemptedToDismissKeyguard;
+    private Set<Callback> mCallbacks = new HashSet<>();
 
     @VisibleForTesting
     public static final AudioAttributes VIBRATION_SONIFICATION_ATTRIBUTES =
@@ -864,6 +867,20 @@ public class UdfpsController implements DozeReceiver {
     }
 
     /**
+     * Add a callback for fingerUp and fingerDown events
+     */
+    public void addCallback(Callback cb) {
+        mCallbacks.add(cb);
+    }
+
+    /**
+     * Remove callback
+     */
+    public void removeCallback(Callback cb) {
+        mCallbacks.remove(cb);
+    }
+
+    /**
      * Cancel updfs scan affordances - ability to hide the HbmSurfaceView (white circle) before
      * user explicitly lifts their finger. Generally, this should be called whenever udfps fails
      * or errors.
@@ -917,6 +934,10 @@ public class UdfpsController implements DozeReceiver {
             mFingerprintManager.onUiReady(mSensorProps.sensorId);
             Trace.endAsyncSection("UdfpsController.e2e.startIllumination", 0);
         });
+
+        for (Callback cb : mCallbacks) {
+            cb.onFingerDown();
+        }
     }
 
     private void onFingerUp() {
@@ -929,6 +950,9 @@ public class UdfpsController implements DozeReceiver {
         }
         if (mOnFingerDown) {
             mFingerprintManager.onPointerUp(mSensorProps.sensorId);
+            for (Callback cb : mCallbacks) {
+                cb.onFingerUp();
+            }
         }
         mOnFingerDown = false;
         if (mView.isIlluminationRequested()) {
@@ -949,4 +973,19 @@ public class UdfpsController implements DozeReceiver {
             mView.setOnTouchListener(mOnTouchListener);
         }
     }
+
+    /**
+     * Callback for fingerUp and fingerDown events.
+     */
+    public interface Callback {
+        /**
+         * Called onFingerUp events. Will only be called if the finger was previously down.
+         */
+        void onFingerUp();
+
+        /**
+         * Called onFingerDown events.
+         */
+        void onFingerDown();
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/charging/RippleShader.kt b/packages/SystemUI/src/com/android/systemui/statusbar/charging/RippleShader.kt
index 146046b33375..5175977d4e81 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/charging/RippleShader.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/charging/RippleShader.kt
@@ -147,8 +147,12 @@ class RippleShader internal constructor() : RuntimeShader(SHADER, false) {
 
             val fadeIn = subProgress(0f, 0.1f, value)
             val fadeOutNoise = subProgress(0.4f, 1f, value)
-            val fadeOutRipple = subProgress(0.3f, 1f, value)
-            val fadeCircle = subProgress(0f, 0.2f, value)
+            var fadeOutRipple = 0f
+            var fadeCircle = 0f
+            if (shouldFadeOutRipple) {
+                fadeCircle = subProgress(0f, 0.2f, value)
+                fadeOutRipple = subProgress(0.3f, 1f, value)
+            }
             setUniform("in_fadeSparkle", Math.min(fadeIn, 1 - fadeOutNoise))
             setUniform("in_fadeCircle", 1 - fadeCircle)
             setUniform("in_fadeRing", Math.min(fadeIn, 1 - fadeOutRipple))
@@ -200,4 +204,6 @@ class RippleShader internal constructor() : RuntimeShader(SHADER, false) {
             field = value
             setUniform("in_pixelDensity", value)
         }
+
+    var shouldFadeOutRipple: Boolean = true
 }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthRippleControllerTest.kt b/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthRippleControllerTest.kt
index d87a26b096fd..8f5eefcff186 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthRippleControllerTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/biometrics/AuthRippleControllerTest.kt
@@ -42,6 +42,8 @@ import org.mockito.Mockito.reset
 import org.mockito.Mockito.verify
 import org.mockito.MockitoAnnotations
 
+import javax.inject.Provider
+
 @SmallTest
 @RunWith(AndroidTestingRunner::class)
 class AuthRippleControllerTest : SysuiTestCase() {
@@ -55,10 +57,14 @@ class AuthRippleControllerTest : SysuiTestCase() {
     @Mock private lateinit var notificationShadeWindowController: NotificationShadeWindowController
     @Mock private lateinit var bypassController: KeyguardBypassController
     @Mock private lateinit var biometricUnlockController: BiometricUnlockController
+    @Mock private lateinit var udfpsControllerProvider: Provider<UdfpsController>
+    @Mock private lateinit var udfpsController: UdfpsController
 
     @Before
     fun setUp() {
         MockitoAnnotations.initMocks(this)
+        `when`(udfpsControllerProvider.get()).thenReturn(udfpsController)
+
         controller = AuthRippleController(
             statusBar,
             context,
@@ -69,6 +75,7 @@ class AuthRippleControllerTest : SysuiTestCase() {
             notificationShadeWindowController,
             bypassController,
             biometricUnlockController,
+            udfpsControllerProvider,
             rippleView
         )
         controller.init()
@@ -93,7 +100,7 @@ class AuthRippleControllerTest : SysuiTestCase() {
 
         // THEN update sensor location and show ripple
         verify(rippleView).setSensorLocation(fpsLocation)
-        verify(rippleView).startRipple(any(), any())
+        verify(rippleView).startUnlockedRipple(any(), any())
     }
 
     @Test
@@ -114,7 +121,7 @@ class AuthRippleControllerTest : SysuiTestCase() {
             false /* isStrongBiometric */)
 
         // THEN no ripple
-        verify(rippleView, never()).startRipple(any(), any())
+        verify(rippleView, never()).startUnlockedRipple(any(), any())
     }
 
     @Test
@@ -135,7 +142,7 @@ class AuthRippleControllerTest : SysuiTestCase() {
             false /* isStrongBiometric */)
 
         // THEN no ripple
-        verify(rippleView, never()).startRipple(any(), any())
+        verify(rippleView, never()).startUnlockedRipple(any(), any())
     }
 
     @Test
@@ -159,7 +166,7 @@ class AuthRippleControllerTest : SysuiTestCase() {
 
         // THEN show ripple
         verify(rippleView).setSensorLocation(faceLocation)
-        verify(rippleView).startRipple(any(), any())
+        verify(rippleView).startUnlockedRipple(any(), any())
     }
 
     @Test
@@ -179,7 +186,7 @@ class AuthRippleControllerTest : SysuiTestCase() {
             false /* isStrongBiometric */)
 
         // THEN no ripple
-        verify(rippleView, never()).startRipple(any(), any())
+        verify(rippleView, never()).startUnlockedRipple(any(), any())
     }
 
     @Test
@@ -194,7 +201,7 @@ class AuthRippleControllerTest : SysuiTestCase() {
             0 /* userId */,
             BiometricSourceType.FACE /* type */,
             false /* isStrongBiometric */)
-        verify(rippleView, never()).startRipple(any(), any())
+        verify(rippleView, never()).startUnlockedRipple(any(), any())
     }
 
     @Test
@@ -209,7 +216,7 @@ class AuthRippleControllerTest : SysuiTestCase() {
             0 /* userId */,
             BiometricSourceType.FINGERPRINT /* type */,
             false /* isStrongBiometric */)
-        verify(rippleView, never()).startRipple(any(), any())
+        verify(rippleView, never()).startUnlockedRipple(any(), any())
     }
 
     @Test