declade some values as const

app/src/main/kotlin/com/simplemobiletools/notes/adapters/NotesPagerAdapter.kt

@@ -25,7 +25,7 @@ class NotesPagerAdapter(fm: FragmentManager, val notes: List<Note>, val activity
 
         val fragment = NoteFragment()
         fragment.arguments = bundle
-        fragments.put(position, fragment)
+        fragments[position] = fragment
         return fragment
     }
 

app/src/main/kotlin/com/simplemobiletools/notes/adapters/WidgetAdapter.kt

@@ -20,7 +20,7 @@ import com.simplemobiletools.notes.helpers.OPEN_NOTE_ID
 class WidgetAdapter(val context: Context) : RemoteViewsService.RemoteViewsFactory {
     private val textIds = arrayOf(R.id.widget_text_left, R.id.widget_text_center, R.id.widget_text_right)
     val config = context.config
-    val widgetTextColor = config.widgetTextColor
+    private val widgetTextColor = config.widgetTextColor
 
     override fun getViewAt(position: Int): RemoteViews {
         val views = RemoteViews(context.packageName, R.layout.widget_text_layout).apply {

app/src/main/kotlin/com/simplemobiletools/notes/helpers/Constants.kt

@@ -1,36 +1,36 @@
 package com.simplemobiletools.notes.helpers
 
-val NOTE_ID = "note_id"
-val OPEN_NOTE_ID = "open_note_id"
+const val NOTE_ID = "note_id"
+const val OPEN_NOTE_ID = "open_note_id"
 
 // shared preferences
-val CURRENT_NOTE_ID = "current_note_id"
-val DISPLAY_SUCCESS = "display_success"
-val CLICKABLE_LINKS = "clickable_links"
-val WIDGET_NOTE_ID = "widget_note_id"
-val MONOSPACED_FONT = "monospaced_font"
-val SHOW_KEYBOARD = "show_keyboard"
-val SHOW_WORD_COUNT = "show_word_count"
-val FONT_SIZE = "font_size"
-val GRAVITY = "gravity"
-val CURSOR_PLACEMENT = "cursor_placement"
-val LAST_USED_EXTENSION = "last_used_extension"
-val LAST_USED_SAVE_PATH = "last_used_save_path"
+const val CURRENT_NOTE_ID = "current_note_id"
+const val DISPLAY_SUCCESS = "display_success"
+const val CLICKABLE_LINKS = "clickable_links"
+const val WIDGET_NOTE_ID = "widget_note_id"
+const val MONOSPACED_FONT = "monospaced_font"
+const val SHOW_KEYBOARD = "show_keyboard"
+const val SHOW_WORD_COUNT = "show_word_count"
+const val FONT_SIZE = "font_size"
+const val GRAVITY = "gravity"
+const val CURSOR_PLACEMENT = "cursor_placement"
+const val LAST_USED_EXTENSION = "last_used_extension"
+const val LAST_USED_SAVE_PATH = "last_used_save_path"
 
 // gravity
-val GRAVITY_LEFT = 0
-val GRAVITY_CENTER = 1
-val GRAVITY_RIGHT = 2
+const val GRAVITY_LEFT = 0
+const val GRAVITY_CENTER = 1
+const val GRAVITY_RIGHT = 2
 
 // font sizes
-val FONT_SIZE_SMALL = 0
-val FONT_SIZE_MEDIUM = 1
-val FONT_SIZE_LARGE = 2
-val FONT_SIZE_EXTRA_LARGE = 3
+const val FONT_SIZE_SMALL = 0
+const val FONT_SIZE_MEDIUM = 1
+const val FONT_SIZE_LARGE = 2
+const val FONT_SIZE_EXTRA_LARGE = 3
 
 // note types
-val TYPE_NOTE = 0
-val TYPE_CHECKLIST = 1
+const val TYPE_NOTE = 0
+const val TYPE_CHECKLIST = 1
 
 // mime types
-val MIME_TEXT_PLAIN = "text/plain"
+const val MIME_TEXT_PLAIN = "text/plain"

app/src/main/kotlin/com/simplemobiletools/notes/helpers/DBHelper.kt

@@ -16,15 +16,15 @@ class DBHelper private constructor(private val mContext: Context) : SQLiteOpenHe
     private val mDb: SQLiteDatabase = writableDatabase
 
     companion object {
-        private val DB_NAME = "notes.db"
-        private val DB_VERSION = 3
-        private val TABLE_NAME = "notes"
+        private const val DB_NAME = "notes.db"
+        private const val DB_VERSION = 3
+        private const val TABLE_NAME = "notes"
 
-        private val COL_ID = "id"
-        private val COL_TITLE = "title"
-        private val COL_VALUE = "value"
-        private val COL_TYPE = "type"
-        private val COL_PATH = "path"
+        private const val COL_ID = "id"
+        private const val COL_TITLE = "title"
+        private const val COL_VALUE = "value"
+        private const val COL_TYPE = "type"
+        private const val COL_PATH = "path"
 
         fun newInstance(context: Context) = DBHelper(context)
     }