Load file from RAW

package com.emedinaa.rawdemo

import android.net.Uri
import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_main.*
import java.io.*

class MainActivity : AppCompatActivity() {

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

        button.setOnClickListener {
            loadTextFromRaw()
        }
    }

    private fun loadTextFromRaw(){
        val file = File(Uri.parse("android.resource://${packageName}/${R.raw.demo}").toString())

        Log.i("CONSOLE","file $file") //file android.resource:/com.emedinaa.rawdemo/2131492864

        val stringBuilder = StringBuilder()
        val inputStream: InputStream = this.resources.openRawResource(R.raw.demo)
        val reader = BufferedReader(InputStreamReader(inputStream))
        var string = ""
        while (true) {
            try {
                val line = reader.readLine()
                line?.let {
                    string = line
                }
                if(line == null) break

            } catch (e: IOException) {
                e.printStackTrace()
            }
            stringBuilder.append(string).append("\n")
        }
        inputStream.close()

        textView.text = stringBuilder.toString()
    }
}