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How to implement media controls (play, pause, stop) using MediaPlayer in Kotlin Android

How to implement media controls (play, pause, stop) using MediaPlayer in Kotlin Android.

Here's a step-by-step tutorial on how to implement media controls (play, pause, stop) using MediaPlayer in Kotlin Android:

Step 1: Set up your project​

Create a new project in Android Studio and set up the necessary dependencies in your app-level build.gradle file. Add the following line to the dependencies block:

implementation 'androidx.media:media:1.4.1'

Step 2: Add the MediaPlayer instance​

In your activity or fragment, declare a MediaPlayer instance as a class variable:

private var mediaPlayer: MediaPlayer? = null

Step 3: Initialize the MediaPlayer​

In your activity's onCreate() or fragment's onViewCreated() method, initialize the MediaPlayer instance:

mediaPlayer = MediaPlayer.create(context, R.raw.your_audio_file)

Replace R.raw.your_audio_file with the resource ID of your audio file. You can also use a URL or file path instead of a resource ID.

Step 4: Implement media controls​

To implement media controls, you can add buttons or other UI elements to your layout. For example, you can add three buttons for play, pause, and stop:

<Button
    android:id="@+id/btn_play"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Play" />

<Button
    android:id="@+id/btn_pause"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Pause" />

<Button
    android:id="@+id/btn_stop"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Stop" />

Step 5: Set click listeners for the buttons​

In your activity or fragment, set click listeners for the play, pause, and stop buttons:

val btnPlay = findViewById<Button>(R.id.btn_play)
val btnPause = findViewById<Button>(R.id.btn_pause)
val btnStop = findViewById<Button>(R.id.btn_stop)

btnPlay.setOnClickListener {
    mediaPlayer?.start()
}

btnPause.setOnClickListener {
    mediaPlayer?.pause()
}

btnStop.setOnClickListener {
    mediaPlayer?.stop()
    mediaPlayer?.prepare()
    mediaPlayer?.seekTo(0)
}

Step 6: Release the MediaPlayer​

To release the MediaPlayer instance when it's no longer needed, override the activity's onDestroy() or fragment's onDestroyView() method:

override fun onDestroy() {
    super.onDestroy()
    mediaPlayer?.release()
    mediaPlayer = null
}

That's it! You have now implemented media controls using MediaPlayer in Kotlin Android. You can customize the behavior of the buttons and add additional features as per your requirements.