This extensions is used to perform intent operations

IntentExtensions.kt

fun onDocument(): Intent {
    val mimeTypes = arrayOf(
        "application/pdf",
        "image/*"
    )
    val intent = Intent(Intent.ACTION_GET_CONTENT)
    intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
    intent.addCategory(Intent.CATEGORY_OPENABLE)
    intent.type = if (mimeTypes.size == 1) mimeTypes[0] else "*/*"
    if (mimeTypes.isNotEmpty()) {
        intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes)
    }
    return intent
}

fun onGallery(): Intent {
    val intent = Intent(Intent.ACTION_PICK)
    intent.type = "image/*"
    val mimeTypes =
        arrayOf("image/jpeg", "image/png")
    intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes)
    return intent
}

fun View.captureFromCamera(): Intent? {
    Intent(MediaStore.ACTION_IMAGE_CAPTURE).also { takePictureIntent ->
        takePictureIntent.resolveActivity(context.packageManager)?.also {
            val photoFile: File? = try {
                createImageFile(context)
            } catch (ex: IOException) {
                // Error occurred while creating the File
                return null
            }
            if (photoFile != null) {
                this.tag = photoFile.absolutePath
            }
          
            photoFile?.also {
                val photoURI: Uri = FileProvider.getUriForFile(
                    context,
                    "${BuildConfig.APPLICATION_ID}.provider",
                    it
                )
                takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI)
                return takePictureIntent
            }
        }
    }
    return null
}

@Throws(IOException::class)
private fun createImageFile(context: Context): File {
    val timeStamp: String = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
    val storageDir: File? = context.getExternalFilesDir(Environment.DIRECTORY_PICTURES)
    return File.createTempFile(
        "JPEG_${timeStamp}_", /* prefix */
        ".jpg", /* suffix */
        storageDir /* directory */
    )
}

This extensions are used to pick image from gallery,camera and pick document from phone file manager