From df949e401bc3a4a7bc4b9e1156a81c41816e1653 Mon Sep 17 00:00:00 2001
From: Matt Pietal <mpietal@google.com>
Date: Fri, 19 Feb 2021 12:45:28 -0500
Subject: [PATCH] Password bouncer - Fix IME with no view

It is not required for an IME to have a visible view. In this case,
provide a default animation to reveal the textview. If an incoming
call starts to animate for the IME, cancel the default animation and
proceed from where it left off.

Fixes: 180298552
Test: manual
Change-Id: I65bfc14554652e4f05971c2b280efa6490a72504
---
 .../com/android/keyguard/KeyguardPasswordView.java  | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardPasswordView.java b/packages/SystemUI/src/com/android/keyguard/KeyguardPasswordView.java
index 92b65b242b0e9..533bec14f60ad 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardPasswordView.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardPasswordView.java
@@ -136,14 +136,23 @@ public class KeyguardPasswordView extends KeyguardAbsKeyInputView {
 
     @Override
     public void startAppearAnimation() {
-        // Reset state, and let IME animation reveal the view as it slides in
+        // Reset state, and let IME animation reveal the view as it slides in, if one exists.
+        // It is possible for an IME to have no view, so provide a default animation since no
+        // calls to animateForIme would occur
         setAlpha(0f);
+        animate()
+            .alpha(1f)
+            .setDuration(500)
+            .setStartDelay(300)
+            .start();
+
         setTranslationY(0f);
     }
 
     @Override
     public void animateForIme(float interpolatedFraction) {
-        setAlpha(interpolatedFraction);
+        animate().cancel();
+        setAlpha(Math.max(interpolatedFraction, getAlpha()));
     }
 
     @Override