Android Question android.system.ErrnoException: open failed: EACCES (Permission denied)

[WangShiQin]

Hi everyone, I encountered an issue while uploading a file to FTP. but run VB program，it's ok，upload and download work well . i use code "rp.CheckAndRequest(rp.PERMISSION_WRITE_EXTERNAL_STORAGE)" in my program, and "AddPermission(android.permission.WRITE_EXTERNAL_STORAGE)" in Manifest, why it doesnt work, i cann't upload my file, occur err: android.system.ErrnoException: open failed: EACCES (Permission denied), “What went wrong?” , who can help to change my code , thanks lot very very much.
(The IP, account, and password in the code are all valid and can be used.)

 

[DonManfred]

whenever you see

File.DirRootExternal

you immediatly know it is broken.

android.jar / targetSdkVersion / minSdkVersion

There are several versioned components that affect the compilation process and the runtime behavior of our apps. The purpose of this tutorial is to explain the differences between them and help you choose which version to use. Each Android version is mapped to an api level. You can see this...

www.b4x.com

 

[WangShiQin]

yes, i done all what you said,
( If PhoneVer.SdkVersion >=23 Then
rp.CheckAndRequest(rp.PERMISSION_WRITE_EXTERNAL_STORAGE)
Wait For Activity_PermissionResult (Permission As String, Result As Boolean)
xui.MsgboxAsync(Result,"Result:")
End If)

manifest
<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="30"
android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

but it doesnt work , always occurs <Permission denied>, what should i do ?

 

[WangShiQin]

DonManFred, would you like help me to modify my code? I would greatly appreciate it.

 

[agraham]

If it is for your own use then set the target SDK to 28 and it will work,

 

[WangShiQin]

it seems to have to set phone's Permission to accece files, isn't it?

 

[DonManfred]

it seems to have to set phone's Permission to accece files, isn't it?

check the link i posted above. If your app is supposed to be on playstore then you have to use targetsdk 33.
if not then you can use targetsdk 28 like @agraham suggested.