Play sound on Android

Motivation

When writing app you sometimes want to play some sounds e.g. for notifications.

In Android this can be accomplished by using the SoundPool class.

Resource files

Resource files e.g. your wav shall be placed under

app\src\main\res\raw

Code snippet

This is a working example for playing short sound files. If you want to make a full blown media player you should use the MediaPlayer class

import android.media.AudioManager
import android.media.SoundPool
import android.os.Build
import android.os.Bundle
import android.view.View
import androidx.appcompat.app.AppCompatActivity


class MainActivity : AppCompatActivity() {
    private var mCSoundOne: Int = 0
    private lateinit var mSoundPool: SoundPool
    private var mLoaded = false

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

        mSoundPool = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            SoundPool.Builder().setMaxStreams(1).build()
        } else {
            SoundPool(1, AudioManager.STREAM_MUSIC, 1)
        }
        mSoundPool.setOnLoadCompleteListener(SoundPool.OnLoadCompleteListener { soundPool, sampleId, status ->
            mLoaded = true
        })
        mCSoundOne = mSoundPool.load(applicationContext, R.raw.eins, 1)

    }

    fun play_one(view: View?) {
        if (mLoaded) {
            mSoundPool.play(mCSoundOne, 1.0f, 1.0f, 0, 0, 1.0f)
        }
    }
}