From d2d58656a4ac1da8580c3636a681f36cba0c1ba9 Mon Sep 17 00:00:00 2001
From: Tony Wickham <twickham@google.com>
Date: Fri, 20 Sep 2019 12:54:14 -0700
Subject: [PATCH] Don't crash when swiping up if there are no TaskViews

This can happen in LockTask mode, after enabling Overview. In that case,
you are locked to the current task, but are allowed to go to overview
but no tasks are shown there.

Bug: 139917483
Change-Id: I2180cc5e72c343977ea53cc02907ed8dac0f8bc6
Merged-In: I2180cc5e72c343977ea53cc02907ed8dac0f8bc6
(cherry picked from commit 60bf8c117b2388a8f243f20e673c29656548be4a)
---
 .../android/quickstep/LauncherActivityControllerHelper.java   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityControllerHelper.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityControllerHelper.java
index 25cc33df01..36eb8a13bd 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityControllerHelper.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityControllerHelper.java
@@ -381,6 +381,10 @@ public final class LauncherActivityControllerHelper implements ActivityControlHe
             TaskView runningTaskView = recentsView.getRunningTaskView();
             if (runningTaskView == null) {
                 runningTaskView = recentsView.getTaskViewAt(recentsView.getCurrentPage());
+                if (runningTaskView == null) {
+                    // There are no task views in LockTask mode when Overview is enabled.
+                    return;
+                }
             }
             TimeInterpolator oldInterpolator = translateY.getInterpolator();
             Rect fallbackInsets = launcher.getDeviceProfile().getInsets();