read file kotlin
//internal storage
var fileInputStream: FileInputStream? = null
fileInputStream = openFileInput(filename)
var inputStreamReader: InputStreamReader = InputStreamReader(fileInputStream)
val bufferedReader: BufferedReader = BufferedReader(inputStreamReader)
val stringBuilder: StringBuilder = StringBuilder()
var text: String? = null
while ({ text = bufferedReader.readLine(); text }() != null) {
stringBuilder.append(text)
}
//Displaying data on EditText
fileData.setText(stringBuilder.toString()).toString()