How to save a file on Android? (Firemonkey)

Question

How can I save a file locally on an Android device, using Delphi (XE5, Firemonkey)?

Something as simple as

  Memo.Lines.SaveToFile('test.txt')

does not seem to work. It results in the following error message:

"Cannot create file "/test.txt". Not a directory."

When you say locally, what do you mean? SDCard (internal/external?), private data? Other? You cannot create a file in `/` without root and permissions. — Simon, Sep 17 '13 at 19:22
I was hoping that I could just write in the 'current directory' of the internal storage (whereever that may be). Note that I didn't specify the backslash before the file name. I am surprised that it seems to try to write in the root. — Reinier, Sep 17 '13 at 19:24
I also tried this path: "/Android/data/com.embarcadero.TestLocalStorage/files/" (http://developer.android.com/guide/topics/data/data-storage.html seems to indicate that that may be a proper location for Internal Storage). But got the same result — Reinier, Sep 17 '13 at 19:27

score 19 · Accepted Answer · answered Sep 17 '13 at 19:30

19

According to the document Creating an Android App, get the documents path like this:

System.IOUtils.TPath.GetDocumentsPath + System.SysUtils.PathDelim + 'myfile';

answered Sep 17 '13 at 19:30

Marcus Adams

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That's what I was looking for. Thanks a lot! BTW: in this case: no specific permissions are necessary. – Reinier Sep 17 '13 at 19:47
13

Don't you want to use Path.Combine or whatever the function is – David Heffernan Sep 17 '13 at 20:00

score 11 · Answer 2 · edited Jun 17 '19 at 21:16

11

Instead of using System.SysUtils.PathDelim, you may use

System.IOUtils.TPath.Combine(System.IOUtils.tpath.getdocumentspath,'test.txt');

Combine chooses between the windows \ and the Linux /

System.IOUtils must be used in this line instead of setup in the uses clause because there are probably more Tpath initials.

edited Jun 17 '19 at 21:16

Rohit Gupta

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answered Nov 23 '13 at 12:25

user3015173

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score 2 · Answer 3 · edited Nov 18 '13 at 20:33

2

GetHomePath, return a string with the path. -> 'data/data//files'

You can to use:

Memo.Lines.SaveToFile(format('%s/test.txt', [GetHomePath]));

Or this form

Memo.Lines.SaveToFile(GetHomePath + '/test.txt');

edited Nov 18 '13 at 20:33

jszobody

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answered Nov 18 '13 at 20:14

Juan

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score 2 · Answer 4 · answered Feb 08 '14 at 12:36

on my device (and presumably all android devices?) GetHomePath incorrectly gives me /storage/emulated/0/... whereas I need /storage/sdcard0/... to get to the storage visible in Windows Explorer via USB.

so the full path to my files may be '/storage/sdcard0/Android/data/com.embarcadero.(my app name)/files/'

Presumably if you have a plug in SD card this might be sdcard1 or whatever.

You can list the contents of your device storage folder with code like this

  P := '/storage/';
  if (FindFirst(P + '*', faAnyFile, Sr) = 0) then
  repeat
    Memo1.Lines.Add(Sr.Name);
  until (FindNext(Sr) <> 0);
  FindClose(Sr);

On my device this gives me:

sdcard0 usb emulated

then change S when you want to explore subfolders

Note that the files folder gets emptied each time you recompile and deploy.

How to save a file on Android? (Firemonkey)

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