Android Question EACCES (Permission denied) when trying to write from service module

[kostefar]

Dear All,

I´ve moved a ton of stuff to a service module so that internet and file operations can also execute while app is paused. This worked perfectly before when they were in the main activity, but now I get this error:

java.io.FileNotFoundException: /storage/emulated/0/Android/data/mobi.test.test/files/vv/backgrounds.zip: open failed: EACCES (Permission denied)

stopping at this line:

File.Copy (File.DirAssets , "backgrounds.zip",rp.GetSafeDirDefaultExternal("") & "/" & usernametmp,"backgrounds.zip")

I have "Dim rp As RuntimePermissions" in the service module, and in the manifest I have:

<uses-sdk android:minSdkVersion="19" android:targetSdkVersion="23"/>

which was also there before.

Are there special concerns for writing to storage when it´s called from a service module?

Thanks in advance!

 

[Erel]

Are there special concerns for writing to storage when it´s called from a service module?

No.

Don't set targetSdkVersion to 23 unless you want to use runtime permissions: https://www.b4x.com/android/forum/threads/67689

 

[kostefar]

No.

Don't set targetSdkVersion to 23 unless you want to use runtime permissions: https://www.b4x.com/android/forum/threads/67689

Indeed I want to use runtimepermissions and targetsdkversion 23, otherwise it won´t work on Marshmallow. As mentioned, it worked before when it was all in the main activity and all set up following the guide lines in the link you sent:

1. Use RuntimePermissions.GetSafeDirDefaultExternal("") instead of File.DirDefaultExternal. The parameter passed is an optional subfolder that will be created under the default folder.

2. Add this code to the manifest editor:
Code:
AddManifestText(
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
)

This is (also) in my manifest:

AddManifestText(
<uses-permission
  android:name="android.permission.WRITE_EXTERNAL_STORAGE"
  android:maxSdkVersion="18" />
)

The only difference is that file handling is now taking place in a service module - no longer in the main activity.
Is there maybe anything which should be added here in the service module:

#Region Service Attributes
#StartAtBoot: False
#ExcludeFromLibrary: True
#End Region

Edit: Something else must be wrong. Just tried doing this from activity_create in the main activity, and the same happens so after all not related to the type of module inside which it´s running...

 

[Erel]

Indeed I want to use runtimepermissions and targetsdkversion 23, otherwise it won´t work on Marshmallow

That's not correct.

There is no relation between targetSdkVersion and the supported versions.

 

[kostefar]

That's not correct.

There is no relation between targetSdkVersion and the supported versions.

Oh really? Good that I can have this misunderstanding corrected. But why is it then that as soon as I set targetsdkversion to 22, I get this error, when compiling for a 6.0 device:

Failure [INSTALL_FAILED_PERMISSION_MODEL_DOWNGRADE]

 

[Erel]

You need to first uninstall the app. If you already submitted it to Google Play then you will not be able to change it.

 

[kostefar]

You need to first uninstall the app. If you already submitted it to Google Play then you will not be able to change it.

Wow, thanks! I´m so glad I know now that it´s all about the already installed app causing this error! Still wondering though why I get the Access Denied errors, but I may just stop using runtimepermissions and go back to the old way.

Thanks again!

 

[Erel]

Still wondering though why I get the Access Denied errors

It should be:

rp.GetSafeDirDefaultExternal(usernametmp)

 

[kostefar]

It should be:

rp.GetSafeDirDefaultExternal(usernametmp)

Thanks, will remember that!