From 3f34fdc89e6c6d26a2f1defd15b9f2c65d128d05 Mon Sep 17 00:00:00 2001
From: serso <se.solovyev@gmail.com>
Date: Sun, 27 Mar 2016 15:15:26 +0200
Subject: [PATCH] Default value shouldn't be set

---
 .../java/org/solovyev/android/calculator/UiPreferences.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/org/solovyev/android/calculator/UiPreferences.java b/app/src/main/java/org/solovyev/android/calculator/UiPreferences.java
index 00a24233..5634461a 100644
--- a/app/src/main/java/org/solovyev/android/calculator/UiPreferences.java
+++ b/app/src/main/java/org/solovyev/android/calculator/UiPreferences.java
@@ -2,7 +2,6 @@ package org.solovyev.android.calculator;
 
 import android.content.SharedPreferences;
 import android.support.annotation.NonNull;
-
 import org.solovyev.android.prefs.BooleanPreference;
 import org.solovyev.android.prefs.IntegerPreference;
 import org.solovyev.android.prefs.Preference;
@@ -32,6 +31,9 @@ final class UiPreferences {
     }
 
     private static <T> void migratePreference(@NonNull SharedPreferences uiPreferences, @Nonnull SharedPreferences preferences, @NonNull SharedPreferences.Editor uiEditor, @NonNull Preference<T> uiPreference, @NonNull Preference<T> preference) {
+        if (!preference.isSet(preferences)) {
+            return;
+        }
         if (!uiPreference.isSet(uiPreferences)) {
             uiPreference.putPreference(uiEditor, preference.getPreferenceNoError(preferences));
         }