How can I insert a ringtone in MediaStore when wrapping apk with Mobile Iron?

Question

We're using Mobile Iron to wrap our app.

I'm facing problems while inserting a ringtone in the MediaStore. I've read many questions but none are up-to-date: Indeed, MediaStorage.Audio.Media.DATA is deprecated since Android 10 (Q). Moreover, it seems that, searching for a solution, in "Post" Android Q, the content Uri has to be accessed another way. So I have to separate code for "Pre" and "Post" Android Q.

Here is my code:

val collection = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
        MediaStore.Audio.Media.getContentUri(MediaStore.VOLUME_EXTERNAL_PRIMARY)
} else {
        MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
}

val values = ContentValues()
values.put(MediaStore.Audio.Media.TITLE, ringtoneName)
values.put(MediaStore.Audio.Media.DISPLAY_NAME, "ringtone.wav"))
values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/x-wav")
values.put(MediaStore.Audio.Media.IS_RINGTONE, true)
values.put(MediaStore.Audio.Media.IS_MUSIC, false)
values.put(MediaStore.Audio.Media.IS_NOTIFICATION, false)
values.put(MediaStore.Audio.Media.IS_ALARM, false)

if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) {
    Log.e("Ringtone", "Android 9 : Extracting file in external Storage")
    extractRingtone(context)
    var file: File? = null
    try {
        file = File(context.getExternalFilesDir(Environment.DIRECTORY_RINGTONES)!!.canonicalFile, "ringtone.wav")
    } catch (e: IOException) {
        e.printStackTrace()
    }

    values.put(MediaStore.Audio.Media.SIZE, file?.length())
    values.put(MediaStore.Audio.Media.DATA, file?.absolutePath)
}
else
{
    val inputStream = context.resources.openRawResource(R.raw.ringtone)
    val size = inputStream.available()
    values.put(MediaStore.Audio.Media.SIZE, size)
    inputStream.close()
    values.put(MediaStore.Audio.Media.IS_PENDING, true)
}

var newUri: Uri? = null
try {
        newUri = resolver.insert(collection, values)
}
catch (exception: Exception)
{
    Log.e("Ringtone", "Exception while inserting data", exception)
}

Then, in "Post" Android Q, I try to insert the ringtone in the content provider using resolver.openOutputStream(newUri), and then, update the ringtone with MediaStore.Audio.Media.IS_PENDING set to ````false``` but newUri is always null and Exception is never thrown.

The code works correctly when the app isn't wrapped.

Any idea?

Edit: Added MediaStore.Audio.Media.IS_PENDING value in ContentValues, but it didn't do the trick.

Edit 2: Updated question as we now the problem isn't the code but the wrapping of the app using Mobile Iron.

Answer 1

As pointed by @blackapps , the code works correctly, indeed. The thing I didn't mention is that the app is "wrapped" using Mobile Iron. When not wrapped, the code works normally and I don't get the error.

Thanks to him, I came to the conclusion that the wrapping of the app causes my problem, as it makes the app sandboxed and apparently denies the write of any file in the phone.

Anyway, this is not a problem with Android nor Kotlin, but with Mobile Iron.

So I updated my question, its tags and its title.