In this tutorial, we will learn how to create a music player app in Kotlin using MediaPlayer and ExoPlayer libraries. These libraries provide an easy way to play audio and video files in your Android applications. By the end of this tutorial, you will have a fully functioning music player app.
Requirements
Android Studio
Kotlin Knowledge
Step 1: Create a new Android Studio Project
Open Android Studio and create a new project. Choose 'Empty Activity' and click 'Next'. Enter your desired application name, package name, and save location. Select 'Kotlin' as the programming language and click 'Finish'.
Step 2: Add Required Dependencies
In your app's 'build.gradle' file, add the following dependencies:
dependencies {
implementation 'com.google.android.exoplayer:exoplayer:2.X.X'
Replace '2.X.X' with the latest version of ExoPlayer. Sync the project after adding the dependency.
Step 3: Create the User Interface (UI)
Open 'activity_main.xml' and add the following code to create a simple UI for our music player:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<com.google.android.exoplayer2.ui.PlayerView
android:id="@+id/playerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:show_timeout="0"
app:resize_mode="fill"/>
<Button
android:id="@+id/playButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Play"
android:layout_gravity="center_horizontal" />
<Button
android:id="@+id/stopButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Stop"
android:layout_gravity="center_horizontal" />
</LinearLayout>
Step 4: Implement the Music Player
Open 'MainActivity.kt' and add the following code:
import android.net.Uri
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.google.android.exoplayer2.ExoPlayerFactory
import com.google.android.exoplayer2.source.ExtractorMediaSource
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector
import com.google.android.exoplayer2.upstream.DefaultHttpDataSourceFactory
import kotlinx.android.synthetic.main.activity_main.*
class MainActivity : AppCompatActivity() {
private val player by lazy { ExoPlayerFactory.newSimpleInstance(this, DefaultTrackSelector()) }
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
playerView.player = player
playButton.setOnClickListener {
val source = ExtractorMediaSource.Factory(
DefaultHttpDataSourceFactory("MusicPlayer")
).createMediaSource(Uri.parse("https://your-music-url.mp3"))
player.prepare(source)
player.playWhenReady = true
stopButton.setOnClickListener {
player.stop()
override fun onDestroy() {
super.onDestroy()
player.release()
Replace 'https://your-music-url.mp3' with the URL of the music file you want to play.
Step 5: Run the App
Build and run the app on an emulator or a physical device. The music player should now be able to play and stop the music file.
Conclusion
In this tutorial, we learned how to create a simple music player app in Kotlin using MediaPlayer and ExoPlayer libraries. This app can play and stop music files from a given URL. You can extend the functionality by adding more features, such as playlists and local file playback. If you need to
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