Kotlin Android create and share CSV file

Question

My android app create an csv file and share it immediately as the below code. The app start properly but there is no file attached when i select anyone of the application to share it. please kindly help to solve this issue.

class MainActivity : AppCompatActivity() {

    private val CSV_HEADER = "id,name,address,age"

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)


        val qponFile = File.createTempFile("qpon", "csv")
        var fileWriter: FileWriter? = null

        try {
            fileWriter = FileWriter("qpon.csv")

            fileWriter.append(CSV_HEADER)
            fileWriter.append('\n')


                fileWriter.append("aaaaa")
                fileWriter.append(',')
                fileWriter.append("bbbbb")
                fileWriter.append(',')
                fileWriter.append("cccccc")
                fileWriter.append(',')
                fileWriter.append("dddddd")
                fileWriter.append('\n')

            println("Write CSV successfully!")

        } catch (e: Exception) {
            println("Writing CSV error!")
            e.printStackTrace()
        }


        val sendIntent = Intent()
        sendIntent.action = Intent.ACTION_SEND
        sendIntent.putExtra(Intent.EXTRA_STREAM, qponFile)
        sendIntent.type = "text/csv"
        startActivity(Intent.createChooser(sendIntent, "SHARE"))

    }

}

Image1,the app start properly.

Image2, no attachment

score 1 · Answer 1 · answered Jul 09 '18 at 15:32

1

After writing to the file you must close it:
fileWriter.close()
and make this change:
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(qponFile))

answered Jul 09 '18 at 15:32

i think it works. I guess I need to get permission because it shows permission denied. Could you please let me know what kind of permission I have to get? – GPH Jul 09 '18 at 15:40
`` `` `` `` – Jul 09 '18 at 15:45
These are permissions for the mail app. I don't think you need them – Jul 09 '18 at 15:47
same , I tried email and whatsapp. it still doesn't work, – GPH Jul 09 '18 at 15:54
Maybe try to copy the file to external storage and attach it from there – Jul 09 '18 at 15:57

score 0 · Answer 2 · edited Jan 22 '21 at 10:37

val HEADER = "Name, DateTime"

var filename = "export.csv"

var path = getExternalFilesDir(null)   //get file directory for this package
//(Android/data/.../files | ... is your app package)

//create fileOut object
var fileOut = File(path, filename)

//delete any file object with path and filename that already exists
fileOut.delete()

//create a new file
fileOut.createNewFile()

//append the header and a newline
fileOut.appendText(HEADER)
fileOut.appendText("\n")
// trying to append some data into csv file
fileOut.appendText("Haider, 12/01/2021")
fileOut.appendText("\n")


val sendIntent = Intent(Intent.ACTION_SEND)
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(fileOut))
sendIntent.type = "text/csv"
startActivity(Intent.createChooser(sendIntent, "SHARE"))

Kotlin Android create and share CSV file

2 Answers2

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