AndroidManifest.xml

<provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="${applicationId}.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>

file_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- for sharing files that are present in context.cachDir -->
    <cache-path
        name="shared_cache"
        path="." />
</paths>

XMLActivity.kt

 private fun shareMedia(shareType: RWSMediaType) {
        val context = this
        when(shareType){
            IMAGE -> {
                lifecycleScope.launch {
                    val cachePath = File(context.cacheDir, "images")
                    cachePath.mkdirs()
                    val file = File(cachePath, "${System.currentTimeMillis()}.png")
                    val bitmap = getCurrentImageViewBitmap()
                    context.saveBitmapToUserSelectedPath(Uri.fromFile(file),bitmap)// convert bitmap to local cache file first
                    context.shareLocalFile(file)
                }
            }
            PDF ,FILE -> {
                val file = if(shareType==PDF) state.pdfFile!! else state.mediaFile!!
                context.shareLocalFile(file)

            }
        }
    }

fun Context.shareLocalFile(file: File) {
   val context = this
   val mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(file.extension.lowercase()) ?: "application/octet-stream"
   val uri = FileProvider.getUriForFile(context, "${context.packageName}.fileprovider", file)
   val shareIntent = Intent(Intent.ACTION_SEND).apply {
      type = mimeType
      putExtra(Intent.EXTRA_STREAM, uri)
      addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
   }
   context.startActivity(
      Intent.createChooser(shareIntent, "Share file via")
   )
}