adding some widget related null checks

Author: tibbi

app/src/main/kotlin/com/simplemobiletools/notes/pro/activities/WidgetConfigureActivity.kt

@@ -149,7 +149,7 @@ class WidgetConfigureActivity : SimpleActivity() {
         val views = RemoteViews(packageName, R.layout.activity_main)
         views.setBackgroundColor(R.id.text_note_view, mBgColor)
         views.setBackgroundColor(R.id.checklist_note_view, mBgColor)
-        AppWidgetManager.getInstance(this).updateAppWidget(mWidgetId, views)
+        AppWidgetManager.getInstance(this)?.updateAppWidget(mWidgetId, views) ?: return
 
         val extras = intent.extras
         val id = if (extras?.containsKey(CUSTOMIZED_WIDGET_KEY_ID) == true) extras.getLong(CUSTOMIZED_WIDGET_KEY_ID) else null

app/src/main/kotlin/com/simplemobiletools/notes/pro/extensions/Context.kt

@@ -18,7 +18,7 @@ val Context.notesDB: NotesDao get() = NotesDatabase.getInstance(applicationConte
 val Context.widgetsDB: WidgetsDao get() = NotesDatabase.getInstance(applicationContext).WidgetsDao()
 
 fun Context.updateWidgets() {
-    val widgetIDs = AppWidgetManager.getInstance(applicationContext).getAppWidgetIds(ComponentName(applicationContext, MyWidgetProvider::class.java))
+    val widgetIDs = AppWidgetManager.getInstance(applicationContext)?.getAppWidgetIds(ComponentName(applicationContext, MyWidgetProvider::class.java)) ?: return
     if (widgetIDs.isNotEmpty()) {
         Intent(applicationContext, MyWidgetProvider::class.java).apply {
             action = AppWidgetManager.ACTION_APPWIDGET_UPDATE