WallpaperFragment.kt

private fun shareWallpaper() {
    val sharingIntent = ShareCompat.IntentBuilder
            .from(activity)
            .setType("image/*")
            .intent

    if (activity!!.packageManager.resolveActivity(sharingIntent, PackageManager.MATCH_DEFAULT_ONLY) == null) {
        toast(R.string.no_apps_for_share)
    } else {
        sharingIntent.putExtra(Intent.EXTRA_STREAM, imageFileUri)
        val activities = activity!!.packageManager.queryIntentActivities(sharingIntent, PackageManager.MATCH_DEFAULT_ONLY)
        for (activity in activities) {
            getActivity()!!.grantUriPermission(activity.activityInfo.packageName, imageFileUri, Intent.FLAG_GRANT_READ_URI_PERMISSION)
        }
        startActivityForResult(Intent.createChooser(sharingIntent, getString(R.string.share_image)), SHARING_REQUEST_CODE)
    }
}