Android Question Share image throw FileProvider class

[Almog]

Hello,

I tried to use Erel's new class (https://www.b4x.com/android/forum/threads/class-fileprovider-share-files.97865/#content) to share an image. I tried to share an image by the example of sharing a file, but the app crashed...

Does anybody have an example of sharing an image(only) using file provider?

Thanks in advance

 

[Erel]

but the app crashed...

You should post the error message from the logs. Also post the Android version.

 

[agraham]

Here's how I'm doing it for an image I've saved in File.DirRootExternal/Download

    Private Provider As FileProvider ' in Sub Process_Globals
      
    If FirstTime Then ' in Sub Activity_Create
        ....
       Provider.Initialize
       ....
   End If  

Sub btnExtViewer_Click
   ' Provider needs manifest AddApplicationText entry for FileProvider
   ' Provider needs manifest CreateResource entries for both File.DirRootExternal and Download folders
   Provider.SharedFolder = File.DirRootExternal
   Dim intent1 As Intent
   intent1.Initialize(intent1.ACTION_VIEW, Provider.GetFileUri(Starter.MapTempDestination))
   intent1.SetType("image/jpeg")
   intent1.Flags = 1 'FLAG_GRANT_READ_URI_PERMISSION
   StartActivity( intent1 )
End Sub

You need these manifest entries and seem to need a 'CreateResource' entry for each folder on the path you use

AddApplicationText(
  <provider
  android:name="android.support.v4.content.FileProvider"
  android:authorities="$PACKAGE$.provider"
  android:exported="false"
  android:grantUriPermissions="true">
  <meta-data
     android:name="android.support.FILE_PROVIDER_PATHS"
     android:resource="@xml/provider_paths"/>
  </provider>
)
CreateResource(xml, provider_paths,
   <external-path name="downloads" path="Download" />
)
CreateResource(xml, provider_paths,
   <external-path name="root" path="" />
)

 

[Erel]

Every call to CreateResource will create or overwrite a file named provider_paths.xml. This means that the first call in the code above doesn't do anything.

 

[agraham]

Ah! Thanks for the clarification Erel. I got there (as usual) by trial and error rather than by intellect and erroneously concluded that they added paths cumulatively. So therefore the last entry 'root' gives access to the entire public folder structure on DirRootExternal?

 

[Erel]

So therefore the last entry 'root' gives access to the entire public folder structure on DirRootExternal?

Not sure at all. Safer to declare all of the paths:

CreateResource(xml, provider_paths,
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="downloads" path="Download" />
 <external-path name="root" path="" />
</paths>
)

 

[agraham]

I just tried and it does seem to work with just the root entry