From a4477e090599fd7167bf0f62b02da8ce665342c1 Mon Sep 17 00:00:00 2001
From: oliexdev <olie.xdev@googlemail.com>
Date: Sat, 16 Apr 2022 08:49:30 +0200
Subject: [PATCH] fix bug if no reference user is avialable, see #827

---
 .../src/main/java/com/health/openscale/gui/MainActivity.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java b/android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java
index 65ecc1cd..cbdf1662 100644
--- a/android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java
+++ b/android_app/app/src/main/java/com/health/openscale/gui/MainActivity.java
@@ -484,6 +484,11 @@ public class MainActivity extends AppCompatActivity
         builder.setPositiveButton(R.string.label_ok, new DialogInterface.OnClickListener() {
             @Override
             public void onClick(DialogInterface dialog, int which) {
+                if (userIds.isEmpty()) {
+                    Toast.makeText(getApplicationContext(), getString(R.string.info_assisted_weighing_no_reference_user), Toast.LENGTH_LONG).show();
+                    return;
+                }
+
                 int selectedPosition = ((AlertDialog)dialog).getListView().getCheckedItemPosition();
                 prefs.edit().putInt("assistedWeighingRefUserId", userIds.get(selectedPosition)).commit();