MediaPlayer class to implement a basic Audio Player in an Android App

AndroidApps/ApplicationsMobile Development

This example demonstrates how do I create a Mediaplayer class to implement a basic audio player in android app.

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"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:paddingLeft="10dp"
   android:paddingRight="10dp">
   <TextView
      android:id="@+id/textView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Now Playing: "
      android:layout_marginTop="30dp"
      android:textAppearance="?android:attr/textAppearanceMedium" />
   <TextView
      android:id="@+id/txtSongName"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignBaseline="@+id/textView"
      android:layout_toEndOf="@+id/textView" />
   <ImageButton
      android:id="@+id/btnBackward"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignParentBottom="true"
      android:layout_marginBottom="44dp"
      android:layout_marginLeft="20dp"
      android:src="@drawable/ic_back" />
   <ImageButton
      android:id="@+id/btnPlay"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignTop="@+id/btnBackward"
      android:layout_marginLeft="20dp"
      android:layout_toRightOf="@+id/btnBackward"
      android:src="@drawable/ic_play" />
   <ImageButton
      android:id="@+id/btnPause"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignTop="@+id/btnPlay"
      android:layout_marginLeft="20dp"
      android:layout_toRightOf="@+id/btnPlay"
      android:src="@drawable/ic_pause" />
   <ImageButton
      android:id="@+id/btnForward"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignTop="@+id/btnPause"
      android:layout_marginLeft="20dp"
      android:layout_toRightOf="@+id/btnPause"
      android:contentDescription="@+id/imageButton3"
      android:src="@drawable/ic_forward" />
   <TextView
      android:id="@+id/txtStartTime"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignTop="@+id/seekBar"
      android:text="0 min, 0 sec" />
   <SeekBar
      android:id="@+id/seekBar"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_above="@+id/btnBackward"
      android:layout_toLeftOf="@+id/txtSongTime"
      android:layout_toRightOf="@+id/txtStartTime" />
   <TextView
      android:id="@+id/txtSongTime"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_toRightOf="@+id/btnForward"
      android:layout_alignTop="@+id/seekBar"
      android:text="0 min, 0 sec " />
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.java

import android.media.MediaPlayer;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import java.util.concurrent.TimeUnit;
public class MainActivity extends AppCompatActivity {
   private ImageButton forwardBtn, backwardBtn, pauseBtn, playBtn;
   private MediaPlayer mediaPlayer;
   private TextView songName, startTime, songTime;
   private SeekBar songProgress;
   private static int onTime =0, playTime =0, endTime =0, forwardTime = 5000, backwardTime = 5000;
   private Handler handler = new Handler();
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      backwardBtn = findViewById(R.id.btnBackward);
      forwardBtn = findViewById(R.id.btnForward);
      playBtn = findViewById(R.id.btnPlay);
      pauseBtn = findViewById(R.id.btnPause);
      songName = findViewById(R.id.txtSongName);
      startTime = findViewById(R.id.txtStartTime);
      songTime = findViewById(R.id.txtSongTime);
      songName.setText("Bohemian_Rhapsody");
      mediaPlayer = MediaPlayer.create(this, R.raw.bohemian_rhapsody);
      songProgress = findViewById(R.id.seekBar);
      songProgress.setClickable(false);
      pauseBtn.setEnabled(false);
      playBtn.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            Toast.makeText(MainActivity.this, "Playing Audio", Toast.LENGTH_SHORT).show();
            mediaPlayer.start();
            endTime = mediaPlayer.getDuration();
            playTime = mediaPlayer.getCurrentPosition();
            if (onTime == 0) {
               songProgress.setMax(endTime);
               onTime = 1;
            }
            songTime.setText(String.format("%d min, %d sec",
            TimeUnit.MILLISECONDS.toMinutes(endTime),
            TimeUnit.MILLISECONDS.toSeconds(endTime) -
            TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(endTime))));
            startTime.setText(String.format("%d min, %d sec",
            TimeUnit.MILLISECONDS.toMinutes(playTime),
            TimeUnit.MILLISECONDS.toSeconds(playTime) -
            TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(playTime))));
            songProgress.setProgress(playTime);
            handler.postDelayed(UpdateSongTime, 100);
            pauseBtn.setEnabled(true);
            playBtn.setEnabled(false);
         }
      });
      pauseBtn.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            mediaPlayer.pause();
            pauseBtn.setEnabled(false);
            playBtn.setEnabled(true);
            Toast.makeText(getApplicationContext(), "Pausing Audio", Toast.LENGTH_SHORT).show();
         }
      });
      forwardBtn.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            if ((playTime + forwardTime) <= endTime) {
               playTime = playTime + forwardTime;
               mediaPlayer.seekTo(playTime);
            } else {
               Toast.makeText(getApplicationContext(), "Cannot jump forward 5 seconds", Toast.LENGTH_SHORT).show();
            }
            if (!playBtn.isEnabled()) {
               playBtn.setEnabled(true);
            }
         }
      });
      backwardBtn.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            if ((playTime - backwardTime) > 0) {
               playTime = playTime - backwardTime;
               mediaPlayer.seekTo(playTime);
            } else {
               Toast.makeText(getApplicationContext(), "Cannot jump backward 5 seconds", Toast.LENGTH_SHORT).show();
            }
            if (!playBtn.isEnabled()) {
               playBtn.setEnabled(true);
            }
         }
      });
   }
   private Runnable UpdateSongTime = new Runnable() {
      @Override
      public void run() {
         playTime = mediaPlayer.getCurrentPosition();
         startTime.setText(String.format("%d min, %d sec",
         TimeUnit.MILLISECONDS.toMinutes(playTime),
         TimeUnit.MILLISECONDS.toSeconds(playTime) -
         TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(playTime))) );
         songProgress.setProgress(playTime);
         handler.postDelayed(this, 100);
      }
   };
}

Step 4 - 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 Play Icon 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.

raja
Published on 21-Aug-2019 09:03:40
Advertisements