Using filesDir on AsyncTask (Kotlin)

Issue

I'm attempting to run a service that accesses local storage, finds what items have not been uploaded to a server, and uploads them. When attempting to assign my file name, I've been using filesDir in my activities. I believe filesDir requires a context, which the service I'm making doesn't have. Is there an alternative to this? Here's my code:

class AuthorizationSaveTask : AsyncTask<Int, Int, String>() {

override fun onPreExecute() {

}

override fun doInBackground(vararg params: Int?): String {

    val startId = params[0]

    //Get data for list view
    var authorizationArrayList = ArrayList<AuthorizationObject>()
    try {
        //Set target file to authorizations.txt
        val targetFile = File(filesDir, "authorizations.txt")
        //Create new file input stream
        val fis = FileInputStream(targetFile)
        //Create new object input stream, using fis
        val ois = ObjectInputStream(fis)
        //write object input stream to object

        //TODO: There has to be a better syntax than this.
        authorizationArrayList = (ois.readObject() as ArrayList<*>).filterIsInstance<AuthorizationObject>() as ArrayList<AuthorizationObject>
        //close object output stream
        ois.close()
        //close file output stream
        fis.close()

    } catch (e: ClassNotFoundException) {
        e.printStackTrace()
    } catch (e: IOException) {
        e.printStackTrace()
    }
    return "Service complete $startId"
}

override fun onProgressUpdate(vararg values: Int?) {
    super.onProgressUpdate(*values)
    val counter = values[0]
    Log.i("BEAU", "Service Running $counter")
}

override fun onPostExecute(result: String) {
    Log.i("BEAU", result)
}

Thank you for your time! Please let me know if I can provide any additional information.

Solution

A Service IS a Context. More exactly a subclass of it. So you can call getFilesDir() the same way you would in an Activity.

However, the code you are posting does not show a Service but rather an AsyncTask... I don't know where you are creating your AsyncTask but you can still pass the Context as a parameter.

EDIT As it seems that the OP was looking for a way to pass the Context to the AsynkTask, I edited my answer.

Change your code to:

class AuthorizationSaveTask : AsyncTask<Int, Int, String>(val context: Context)

And wherever your are creating you Task pass the context.

val task = AuthorizationSaveTask(this)

You might also want to consider passing just the file.

class AuthorizationSaveTask : AsyncTask<Int, Int, String>(val saveDir: File)

And in your Activity:

val task = AuthorizationSaveTask(filesDir)

Answered By - Yuenbe