Kotlin Audio Recorder Örneği

import android.Manifest

import android.content.pm.PackageManager

import android.media.MediaRecorder

import android.os.Bundle

import android.os.Environment

import android.widget.Button

import android.widget.Toast

import androidx.appcompat.app.AppCompatActivity

import androidx.core.app.ActivityCompat

import androidx.core.content.ContextCompat

import java.io.IOException

class AudioRecorderActivity : AppCompatActivity() {

    private lateinit var mediaRecorder: MediaRecorder

    private var isRecording = false

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)

        setContentView(R.layout.activity_audio_recorder)

        val recordButton = findViewById<Button>(R.id.record_button)

        recordButton.setOnClickListener {

            if (isRecording) {

                stopRecording()

            } else {

                if (checkPermissions()) {

                    startRecording()

                }

            }

        }

    }

    private fun startRecording() {

        mediaRecorder = MediaRecorder()

        mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC)

        mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP)

        mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB)

        val filePath = Environment.getExternalStorageDirectory().absolutePath + "/recording.3gp"

        mediaRecorder.setOutputFile(filePath)

        try {

            mediaRecorder.prepare()

            mediaRecorder.start()

            isRecording = true

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

        } catch (e: IOException) {

            e.printStackTrace()

        }

    }

    private fun stopRecording() {

        mediaRecorder.stop()

        mediaRecorder.release()

        isRecording = false

        Toast.makeText(this, "Recording stopped", Toast.LENGTH_SHORT).show()

    }

    private fun checkPermissions(): Boolean {

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.RECORD_AUDIO), 1)

            return false

        }

        return true

    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {

        super.onRequestPermissionsResult(requestCode, permissions, grantResults)

        if (requestCode == 1 && grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

            startRecording()

        } else {

            Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show()

        }

    }

}