NoteEditor | Note editor for rhythm games | Game Engine library

An error showed up while I was making an note app. I feel that I code everything correct but still I this error is showing:

"Error: Member not found: 'NoteDatabaseHelper._initializeNoteDatabase'. final Future dbFuture = NoteDatabaseHelper._initializeNoteDatabase();"

This is my note list file.

I'm building a note editor in which everything is structured in terms of blocks so when the user selects multiple blocks i.e multiple paragraphs I'm showing a blue overlay over the box container of the block similar to notion.so, But what I want to do is when I show the blue overlay I want to remove the highlight color of the text (The blue highlight when you select text) I've tried user select none but it doesn't work as the class gets added afterwards, I've also tried -webkit-tap-highlight-color but it also doesn't seem to work

Demo: https://www.awesomescreenshot.com/video/4910570?key=905d37aa5750ac2ef7055097c33b6f2b

Sandbox: https://codesandbox.io/s/react-playground-forked-vgel5?file=/Paragraph.js

I am making an android app which takes notes. When i try to add a new note, it gives an array out of bound error. I have checked my code but i cannot seem to figure out why it isnt working. I have set up the if and else statements that change the index value in case of the default negative 1 index value.

Main Activity Code

I am trying to implement two activities that are exchanging information between them using intents. Activity#1 contains an empty listview and a button that starts Activity#2 when pressed. On Activity#2 I have some textbox fields and a "Save" button that sends through intent.putExtra methods information to Activity#1. The issue is that each time I try to create a new View with the information passed by Activity#2, the list is overriding the first element.

You can see below the OnCreate method from Activity#1:

Hi StackOverflow community! I need your help understanding the following behavior:

I tried to implement a ListView for which each view follows the below layout:

I am facing given warning in console:

Warning: A string ref, "grid", has been found within a strict mode tree. String refs are a source of potential bugs and should be avoided. We recommend using useRef() or createRef() instead.

Here's my line of codes:

I've created a CKEditor field and initialized it like this: