Image is saved in application folder with 0 byte size in Kotlin?

Question

I am using the third party library to open the Gallery and camera. I have done that part. Now, when i select multiple image or single image,got the array of URI from the third party lib. Now, i created the file in app package folder and able to create it. But when i check under app folder, the size of an image is 0 byte. I am saving the path also on local db and later will upload it on server using multipart. Below is my code.

To open the Gallery and camera

private fun openPicker() {
    PhotoPickerFragment.newInstance(
        multiple = true,
        allowCamera = true,
        maxSelection = 5,
        theme = R.style.ChiliPhotoPicker_Light
    ).show(childFragmentManager, "picker")
}

got the selected image path URI and save path in to local db with createFile

override fun onImagesPicked(photos: ArrayList<Uri>) {

        Log.e("TAG", "pic" + photos.joinToString(separator = "\n") { it.toString() })

        fileList = ArrayList<File>()

        try {
            photos.forEachIndexed { index, e ->
                println("$e at ${photos[index].path}")
                val destinationFile: File = createImageFile()
                fileList.add(destinationFile)

                fileList.also {

                    // Get the file-name from the image-path
                    val destinationFilePath = it[index].absolutePath
                    val fileName =
                        destinationFilePath.substring(destinationFilePath.lastIndexOf("/") + 1)

                    val attachment = AttachSiteImage()
                    attachment.apply {
                        callLoggingId = callLoggingIdForAttachment
                        attachmentFileName = fileName
                        attachmentPath = destinationFilePath

                    }
                    attachImageviewModel?.addAttachFromApi(attachment)
                }
            }
            Log.e("TAG", "Path->" + fileList.size)

        } catch (ex: FileAlreadyExistsException) {
            //  sourceFile.delete()
            cl_attachments_main_container.showSnackBar(
                if (!ex.localizedMessage.isNullOrEmpty())
                    ex.localizedMessage
                else
                    ex.stackTrace.toString(),
                Snackbar.LENGTH_SHORT
            )
        } catch (ex: IOException) {
            //   sourceFile.delete()
            cl_attachments_main_container.showSnackBar(
                if (!ex.localizedMessage.isNullOrEmpty())
                    ex.localizedMessage
                else
                    ex.stackTrace.toString(),
                Snackbar.LENGTH_SHORT
            )
        }
    }

Create the file where photos will be stored

 @Throws(IOException::class)
    private fun createImageFile(): File {
        // Create an image file name
        val timeStamp: String = SimpleDateFormat("yyyyMMdd_HHmmss").format(Date())
        val storageDir: File? = requireContext().getExternalFilesDir(Environment.DIRECTORY_PICTURES)
        return File.createTempFile(
            "${callLoggingIdForAttachment}_${timeStamp}_", /* prefix */
            ".jpg", /* suffix */
            storageDir /* directory */
        )
    }

Here is the Library URL: https://github.com/ChiliLabs/ChiliPhotoPicker

Answer 1

Your createImageFile() function creates an empty file by returning a result of createTempFile, not an image file. You don't write anything to that empty file and use it as the attachment. And in

// Get the file-name from the image-path
val destinationFilePath = it[index].absolutePath

you don't use the image path as the comment says; you use the path of the empty file you just created.

The image file is given to you as Uri, e in

photos.forEachIndexed { index, e ->

but you ignore it except to log

println("$e at ${photos[index].path}")

So convert Uri to File

val destinationFile = File(e.path)

and work with that. Or copy it to the file created by createImageFile if that's what you want (answers there are for Java but IDEA/Android Studio can convert them to Kotlin for you).