Build error with read/write file

Solar2D Android
#1

I have this code, which should create file with argument if app is running for the first time.

file = io.open("config.txt", "r") if file == nil then   local t = {     ["scoreNum"] = 0,     ["tableOfNum"] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},     ["highScore"] = 0}   file:write(tostring(json.encode( t )))   file:close() else   file:close() end

In Corona simulator I had no problem with this code, everything works well, but after building project I had this: “attempt to index local ‘file’ (a nil value)” in line file:write(tostring(json.encode( t )))

Also I tried to change the build.settings file (line below) but it did not help

android = { usesPermissions = {       "android.permission.MANAGE\_DOCUMENTS", }, },

What am I doing wrong?

(sorry for my English if something do not understand - write

можно написать на русском, но на всякий случай продублируйте на Английском, вдруг админам не понравится)

#2

It’s likely you are trying to write to system.ResourceDirectory which on device is read only. You need to use system.pathForFile() to create a path to the system.DocumentsDirectory, something like:

local path = system.pathForFile( "config.txt", system.DocumentsDirectory) local file = io.open(path, "w")

You also need to open the file for writing if you intend to write to it. The “r” says to open the file for reading.

Rob

#3

It’s likely you are trying to write to system.ResourceDirectory which on device is read only. You need to use system.pathForFile() to create a path to the system.DocumentsDirectory, something like:

local path = system.pathForFile( "config.txt", system.DocumentsDirectory) local file = io.open(path, "w")

You also need to open the file for writing if you intend to write to it. The “r” says to open the file for reading.

Rob