Android Question getting error by trying to use FileHandler

Mehrzad238

Active Member
hello, I'm trying to use FileHandler in my project using this example:
TextEditor - Save and load external files

but I'm facing with this error:

B4X: 
Unknown type: b4xmainpage<br />Are you missing a library reference?

I attached the screenshots.

I'm using b4a not b4x Does that have something to this? if it does what is the replacement?
 

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