From 9b3524d8397ff2bebf64331063a14a40b61924f4 Mon Sep 17 00:00:00 2001
From: Ben Kwa <kenobi@google.com>
Date: Wed, 24 Feb 2016 10:11:10 -0800
Subject: [PATCH] Fix a crash when browsing empty roots.

BUG=27292682

Change-Id: I383fd359a959e86fca3f6716575027aa3b4723cf
---
 .../src/com/android/documentsui/dirlist/FocusManager.java    | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/DocumentsUI/src/com/android/documentsui/dirlist/FocusManager.java b/packages/DocumentsUI/src/com/android/documentsui/dirlist/FocusManager.java
index 7f867d521c43f..f8ee956ea5c82 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/dirlist/FocusManager.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/dirlist/FocusManager.java
@@ -113,6 +113,11 @@ class FocusManager implements View.OnFocusChangeListener {
      * Requests focus on the item that last had focus. Scrolls to that item if necessary.
      */
     public void restoreLastFocus() {
+        if (mAdapter.getItemCount() == 0) {
+            // Nothing to focus.
+            return;
+        }
+
         if (mLastFocusPosition != RecyclerView.NO_POSITION) {
             // The system takes care of situations when a view is no longer on screen, etc,
             focusItem(mLastFocusPosition);