write files to sd card on android

Solar2D Android
#1

Hi,

Hope you can help. I can successfully write a file to the android internal memory using

[lua]system.pathForFile( “data.txt”, system.DocumentsDirectory )
fh, errStr = io.open( path,“a”)
if fh
fh:write(theText … “\n”)
end
io.close()[/lua]

HOWEVER my question is how do i do the same to the sdcard - i need to write large files and (a) dont want to run out of memory and (b) dont want to have to use ADB pull everytime I want access to the data. There doesnt seem to be an option in pathforfile

thanks

Steve [import]uid: 101461 topic_id: 17237 reply_id: 317237[/import]

#2

I believe you can do that by ensuring the following permission is in your build.settings file:

settings = { androidPermissions = { "android.permission.WRITE_EXTERNAL_STORAGE", },}[/code] [import]uid: 52430 topic_id: 17237 reply_id: 65173[/import]

#3

Hmm, how do you reference the SD card when reading/writing tho? [import]uid: 8872 topic_id: 17237 reply_id: 65672[/import]

#4

thanks, but how do you reference the SD card?

system.pathForFile( “data.txt”, system.DocumentsDirectory )
doesnt allow this?

thanks

[import]uid: 101461 topic_id: 17237 reply_id: 65747[/import]

#5

If anyone read this … i was able to make it work writing the full path
enable the external_write permission on the build.settings with

“android.permission.WRITE_EXTERNAL_STORAGE”,

then

local lfile = io.open("/mnt/local/test.txt",“w”)
lfile:write(“test”)
lfile:close()
to a sd card the path would be /mnt/sdcard/test.txt at least on my device

hope it helps someone … [import]uid: 125477 topic_id: 17237 reply_id: 144615[/import]

#6

If anyone read this … i was able to make it work writing the full path
enable the external_write permission on the build.settings with

“android.permission.WRITE_EXTERNAL_STORAGE”,

then

local lfile = io.open("/mnt/local/test.txt",“w”)
lfile:write(“test”)
lfile:close()
to a sd card the path would be /mnt/sdcard/test.txt at least on my device

hope it helps someone … [import]uid: 125477 topic_id: 17237 reply_id: 144615[/import]

#7

If anyone read this … i was able to make it work writing the full path
enable the external_write permission on the build.settings with

“android.permission.WRITE_EXTERNAL_STORAGE”,

then

local lfile = io.open("/mnt/local/test.txt",“w”)
lfile:write(“test”)
lfile:close()
to a sd card the path would be /mnt/sdcard/test.txt at least on my device

hope it helps someone … [import]uid: 125477 topic_id: 17237 reply_id: 144615[/import]

#8

If anyone read this … i was able to make it work writing the full path
enable the external_write permission on the build.settings with

“android.permission.WRITE_EXTERNAL_STORAGE”,

then

local lfile = io.open("/mnt/local/test.txt",“w”)
lfile:write(“test”)
lfile:close()
to a sd card the path would be /mnt/sdcard/test.txt at least on my device

hope it helps someone … [import]uid: 125477 topic_id: 17237 reply_id: 144615[/import]

#9

any news about the correct path to the sdcard

it seems different on several devices

thanks

chris

#10

any news about the correct path to the sdcard

it seems different on several devices

thanks

chris

#11

I know it’s bad to necro threads, but just to help someone having the same problem, turns out the path for mine was /mnt/extSdCard

You can check the files and directory names using this snippet though, I hope it helps someone!

local lfs = require(“lfs”)

local function testPath()

local path = “/mnt/extSdCard” – using only “/” will printout all the files and directories, so I used /mnt and found extSdCard

local pathType = “”

– Check to see if path exists

if path and lfs.attributes( path ) then

   pathType = lfs.attributes( path ).mode

end

– Check if path is a directory

if pathType == “directory” then

  for file in lfs.dir( path ) do

      if “.” ~= file and “…” ~= file then

      print("FILE: " … file)

         – Get the file attributes.

         local fileAtr = lfs.attributes( path … “/” … file )

         – Print path, name and type of file (Directory or file)

         if fileAtr ~= nil then print(path,file,fileAtr.mode) end

      end

   end

end

end

testPath()

#12

I know it’s bad to necro threads, but just to help someone having the same problem, turns out the path for mine was /mnt/extSdCard

You can check the files and directory names using this snippet though, I hope it helps someone!

local lfs = require(“lfs”)

local function testPath()

local path = “/mnt/extSdCard” – using only “/” will printout all the files and directories, so I used /mnt and found extSdCard

local pathType = “”

– Check to see if path exists

if path and lfs.attributes( path ) then

   pathType = lfs.attributes( path ).mode

end

– Check if path is a directory

if pathType == “directory” then

  for file in lfs.dir( path ) do

      if “.” ~= file and “…” ~= file then

      print("FILE: " … file)

         – Get the file attributes.

         local fileAtr = lfs.attributes( path … “/” … file )

         – Print path, name and type of file (Directory or file)

         if fileAtr ~= nil then print(path,file,fileAtr.mode) end

      end

   end

end

end

testPath()