fix #34, remember last value inserted at reminder minutes

app/src/main/java/com/simplemobiletools/calendar/Config.java

@@ -48,4 +48,12 @@ public class Config {
     public void setDisplayWeekNumbers(boolean displayWeekNumbers) {
         mPrefs.edit().putBoolean(Constants.WEEK_NUMBERS, displayWeekNumbers).apply();
     }
+
+    public int getLastOtherReminderMins() {
+        return mPrefs.getInt(Constants.LAST_OTHER_REMINDER_MINS, 10);
+    }
+
+    public void setLastOtherReminderMins(int lastMins) {
+        mPrefs.edit().putInt(Constants.LAST_OTHER_REMINDER_MINS, lastMins).apply();
+    }
 }

app/src/main/java/com/simplemobiletools/calendar/Constants.java

@@ -21,4 +21,5 @@ public class Constants {
     public static final String WEEK_NUMBERS = "week_numbers";
     public static final String WIDGET_BG_COLOR = "widget_bg_color";
     public static final String WIDGET_TEXT_COLOR = "widget_text_color";
+    public static final String LAST_OTHER_REMINDER_MINS = "last_other_reminder_mins";
 }

app/src/main/kotlin/com/simplemobiletools/calendar/activities/EventActivity.kt

@@ -93,6 +93,7 @@ class EventActivity : SimpleActivity(), DBHelper.DBOperationsListener {
         title = resources.getString(R.string.new_event)
         mEventStartDateTime = Formatter.getDateTimeFromCode(dayCode).withZoneRetainFields(DateTimeZone.getDefault()).withHourOfDay(13)
         mEventEndDateTime = mEventStartDateTime
+        event_reminder_other.setText(mConfig.lastOtherReminderMins.toString())
     }
 
     private fun hideKeyboard() {
@@ -211,6 +212,14 @@ class EventActivity : SimpleActivity(), DBHelper.DBOperationsListener {
         } else {
             dbHelper.update(mEvent)
         }
+
+        saveLastReminderMins()
+    }
+
+    private fun saveLastReminderMins() {
+        if (event_reminder.selectedItemPosition == 2) {
+            mConfig.lastOtherReminderMins = reminderMinutes
+        }
     }
 
     private val reminderMinutes: Int