Android Question Can't read or write from DirAssets

DonManfred said:

DirAssets is readonly. You can not write here.

where is the code which raises the error?

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pdfname = "vb2010.pdf"
    File.Copy(File.DirAssets,pdfname,File.DirDefaultExternal,pdfname)
    pdf.Initialize("PDFView",File.Combine(File.DirDefaultExternal,pdfname),1,True,True)

Alansari said:

B4X:

pdfname = "vb2010.pdf"
    File.Copy(File.DirAssets,pdfname,File.DirDefaultExternal,pdfname)
    pdf.Initialize("PDFView",File.Combine(File.DirDefaultExternal,pdfname),1,True,True)

whan i start the app can't read the files from DirAssets

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DonManfred said:

looks like the file is not there.
Is it listed in the files tab in the IDE?

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Alansari said:

What is the solution ?

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Dim rp As RuntimePermissions   'need runtime permissions library. This line should preferably in Starter service
    File.Copy(File.DirAssets,pdfname,rp.GetSafeDirDefaultExternal(""),pdfname)

Syd Wright said:

Maybe you have used capital letters in your actual file name?

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Mahares said:

You should use runtime permissions and your code should include something like this:

B4X:

Dim rp As RuntimePermissions   'need runtime permissions library. This line should preferably in Starter service
    File.Copy(File.DirAssets,pdfname,rp.GetSafeDirDefaultExternal(""),pdfname)

Also: Your target SDK in your manifest should be: 26 not 28


It does not matter anymore. The file names are internally converted to lower case. So, it is not a problem if the asset files are in uppercase.

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DonManfred said:

the forum search is working. Just search for it

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Alansari said:

I did not know to do that

if this file in DirAssets : index.txt
how to access it ?

please write to me the full code

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Computersmith64 said:

The runtime permissions tutorial (https://www.b4x.com/android/forum/threads/runtime-permissions-android-6-0-permissions.67689/#content) provides all the information you need to be able to write the code yourself. If there are other things that aren't clear to you, then search the forum for the specific issue you are having & if you still can't figure it out then ask - but don't expect other forum members to write the code for you. You won't learn anything if you just copy & past code that others have written.

- Colin.

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Alansari said:

Thanks a lot

I did not find link of library download

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Computersmith64 said:

Which library? Runtime Permissions? I think it's a core library, so look for it in the Libraries tab in the B4A IDE.

View attachment 75297

- Colin.

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IdasI4A said:

Test with

B4X:

    If File.Exists(rp.GetSafeDirDefaultExternal(""),"fav.db") =  False Then
       File.Copy(File.DirAssets,"fav.db",rp.GetSafeDirDefaultExternal(""),"fav.db")
   End If

or better yet

B4X:

    dim Carpeta as String

    Carpeta=rp.GetSafeDirDefaultExternal("")
    If File.Exists(Carpeta,"fav.db") =  False Then
       File.Copy(File.DirAssets,"fav.db",Carpeta,"fav.db")
   End If

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File.Copy(File.DirAssets,aaa.pdf,File.DirDefaultExternal,aaa.pdf)
    pdf.Initialize("PDFView",File.Combine(File.DirDefaultExternal,aaa.pdf),1,True,True)

Alansari said:

this code work :
but last line not work:

B4X:

pdf.Initialize("PDFView",File.Combine(File.DirDefaultExternal,pdfname),1,True,True)

How to correct ???

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