Android: code works with api 19 but not with api 24

Question

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.media.MediaPlayer
import android.media.MediaRecorder
import android.os.Environment
import android.view.View
import android.widget.Toast
import java.io.IOException
import android.widget.ImageButton


class record : AppCompatActivity() {

    var buttonStart: ImageButton? = null
    var buttonStop: ImageButton? = null
    var buttonPlayLastRecordAudio: ImageButton? = null
    var buttonStopPlayingRecording: ImageButton? = null
    var AudioSavePathInDevice = "Blesson"
    var mediaRecorder: MediaRecorder? = null


    var mediaPlayer: MediaPlayer? = null

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

        buttonStart = findViewById(R.id.record) as ImageButton
        buttonStop = findViewById(R.id.stop) as ImageButton
        buttonPlayLastRecordAudio = findViewById(R.id.play) as ImageButton
        buttonStopPlayingRecording= findViewById(R.id.playstop) as ImageButton
        buttonStop!!.isEnabled = false
        buttonPlayLastRecordAudio!!.isEnabled = false




        buttonStart!!.setOnClickListener {


            AudioSavePathInDevice = Environment.getExternalStorageDirectory().absolutePath + "/" +"Medpro.mp3"

            MediaRecorderReady()

            try {
                mediaRecorder!!.prepare()
                mediaRecorder!!.start()
            } catch (e: IllegalStateException) {
                Toast.makeText(this, "Recording roblem started",
                        Toast.LENGTH_LONG).show()
            }



            buttonStart!!.isEnabled = false
            buttonStart!!.visibility = View.INVISIBLE
            buttonStop!!.visibility = View.VISIBLE
            buttonStop!!.isEnabled = true

            Toast.makeText(this, "Recording started",
                    Toast.LENGTH_LONG).show()

        }
            buttonStop!!.setOnClickListener {

                 mediaRecorder!!.stop()
                 buttonStop!!.isEnabled = false
                 buttonPlayLastRecordAudio!!.isEnabled = true
                // buttonStart!!.isEnabled = true
                 buttonStopPlayingRecording!!.isEnabled = false

                     Toast.makeText(this, "Recording Completed",
                            Toast.LENGTH_LONG).show()
                 buttonStop!!.visibility = View.INVISIBLE
                  buttonPlayLastRecordAudio!!.visibility = View.VISIBLE


        }

              buttonPlayLastRecordAudio!!.setOnClickListener {
                  buttonStop!!.isEnabled = false
                  buttonStart!!.isEnabled = false
                  buttonPlayLastRecordAudio!!.visibility=View.INVISIBLE
                  buttonStopPlayingRecording!!.isEnabled = true
                  buttonStopPlayingRecording!!.visibility=View.VISIBLE

                    mediaPlayer = MediaPlayer()
                     try {
                         mediaPlayer!!.setDataSource(AudioSavePathInDevice)
                         mediaPlayer!!.prepare()
                        } catch (e: IOException) {
                                Toast.makeText(this, "Recoring not found",
                                 Toast.LENGTH_LONG).show() 
                        }

                          mediaPlayer!!.start()
                          Toast.makeText(this, "Recording Playing",
                          Toast.LENGTH_LONG).show() 
              }

                 buttonStopPlayingRecording!!.setOnClickListener {

                 buttonStopPlayingRecording!!.isEnabled = false
                 buttonPlayLastRecordAudio!!.isEnabled = true

                      if (mediaPlayer != null) {
                      mediaPlayer!!.stop()
                      mediaPlayer!!.release()
                     MediaRecorderReady() 
                      }
              }



        }


        fun MediaRecorderReady() {
            mediaRecorder = MediaRecorder()
            mediaRecorder!!.setAudioSource(MediaRecorder.AudioSource.MIC)
            mediaRecorder!!.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)
            mediaRecorder!!.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB)
            mediaRecorder!!.setOutputFile(AudioSavePathInDevice)
        }
    }

/* The error that is associated with this code

FATAL EXCEPTION: main Process: com.example.admin.lifeplus, PID: 21679 java.lang.RuntimeException: setAudioSource failed. at android.media.MediaRecorder.setAudioSource(Native Method) at com.example.admin.lifeplus.record.MediaRecorderReady(record.kt:138) at com.example.admin.lifeplus.record$onCreate$1.onClick(record.kt:45) at android.view.View.performClick(View.java:5623) at android.view.View$PerformClick.run(View.java:22433) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6247) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762) */

The given above is my code for recording an audio file, it works fine with api 19 devices but does not work with api 24. Can you help me?

Answer 1

You must need to ask for RECORD_AUDIO permission at runtime for API level 23 and above.

Check out this link for more information.