Alertdialog Media Player, Start, Stop(How to set MediaPlayer volume programmatically?)

In this tutorial we learn How to start mediaplayer with alertdialog, and how to change the volume programmatically. Please note we have to provide your own sound in raw folder.

1.

2.

Sound Played

 So let's start: my activity_main.xml

MainActivity.java

import java.io.File;
import java.io.IOException;



import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {
 protected static final String LOG_TAG = "MediaPlayerDemo";

 MediaPlayer mp = new MediaPlayer();
 MediaPlayer player;
 int volume_level = 10, volume_incr = 10;
 boolean done;

 /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       

        View alarmButton = findViewById(R.id.alarm_button);
        alarmButton.setOnClickListener(this);       
        
    }

    @Override
    public void onClick(View v) {
     switch (v.getId()) {
   
  case R.id.alarm_button:
   playAlarm();
  }
    }
    
 
 
 
 void playAlarm() {
  AlertDialog dlg = new AlertDialog.Builder(this).create();
  dlg.setTitle("Wake up time!");
  dlg.setButton(AlertDialog.BUTTON1, "I'm awake!", new DialogInterface.OnClickListener() {   
   @Override
   public void onClick(DialogInterface dialog, int which) {
    player.setOnCompletionListener(null);
    player.stop();
    player.release();
    done = true;
    
   
   }
  });
  dlg.show();
  player = MediaPlayer.create(this, R.raw.alarm_sound);
  player.setVolume(volume_level, volume_level);
  player.start();
  player.setOnCompletionListener(new OnCompletionListener() {   
   @Override
   public void onCompletion(MediaPlayer arg0) {
    volume_level += volume_incr;
    player.setVolume(volume_level, volume_level);
    /*try {
     player.prepare();
    } catch (IOException e) {
     // Should be a CANTHAPPEN since was previously prepared!
     Log.i(LOG_TAG, "Unexpected IOException " + e);
    }*/
    player.start();
   }
  });
 }
}

Dont forget to add this permission to the manifest: