How to play audio file from the assets directory in Android?

This example demonstrates how do I play audio file from the assets directory in android.
Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <Button
      android:id="@+id/btnPlayAudio"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text=" Play audio"
      android:textStyle="italic"
      android:layout_centerInParent="true" />
</RelativeLayout>
Step 3 − Create a asset folder, Right click on the project → New → Folder → Asset Folder.Copy and paste the audio file into the assets folder.
Step 4 − Add the following code to src/MainActivity.java
import android.content.res.AssetFileDescriptor;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
   Button button;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      button = findViewById(R.id.btnPlayAudio);
      button.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            MediaPlayer mediaPlayer = new MediaPlayer();
            AssetFileDescriptor afd;
            try {
               afd = getAssets().openFd("audio.mp3");
               mediaPlayer.setDataSource(afd.getFileDescriptor());
               mediaPlayer.prepare();
               mediaPlayer.start();
            } catch (IOException e) {
               e.printStackTrace();
            }
            Toast.makeText(MainActivity.this, "Playing
            audio from Asset directory",
            Toast.LENGTH_SHORT).show();
         }
      });
   }
}
Step 5 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
Click here to download the project code.