Play foreground and background music using SoundPool and MediaPlayer

Merge the previous exercises "A simple exercise to play MIDI audio using MediaPlayer" and "Play audio resources using SoundPool", to implement a app to play audio using both MediaPlayer and SoundPool.



Copy midi and ogg sound file into res/raw folder.

Modify main.xml to have four buttons to control the playing of the sounds.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   >
<TextView 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/hello"
   />
<Button
   android:id="@+id/playmediaplayer" 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="- PLAY MediaPlayer -"
   />
<Button
   android:id="@+id/pausemediaplayer" 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="- PAUSE MediaPlayer -"
   />
<Button
   android:id="@+id/playsoundpool" 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="- PLAY SoundPool -"
   />
<Button
   android:id="@+id/pausesoundpool" 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="- PAUSE SoundPool -"
   />
</LinearLayout>

Modify AndroidAudioPlayer.java.

package com.exercise.AndroidAudioPlayer;

import java.util.HashMap;

import android.app.Activity;
import android.content.Context;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.SoundPool;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class AndroidAudioPlayer extends Activity {
 
 MediaPlayer mediaPlayer;
 SoundPool soundPool;
 HashMap<Integer, Integer> soundPoolMap;
 int soundID = 1;
 
   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
      
       mediaPlayer = MediaPlayer.create(this, R.raw.midi_sound);
       soundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 100);
       soundPoolMap = new HashMap<Integer, Integer>();
       //soundPoolMap.put(soundID, soundPool.load(this, R.raw.midi_sound, 1));
       soundPoolMap.put(soundID, soundPool.load(this, R.raw.fallbackring, 1));
      
       Button buttonPlayMediaPlayer = (Button)findViewById(R.id.playmediaplayer);
       Button buttonPauseMediaPlayer = (Button)findViewById(R.id.pausemediaplayer);
       Button buttonPlaySoundPool = (Button)findViewById(R.id.playsoundpool);
       Button buttonPauseSoundPool = (Button)findViewById(R.id.pausesoundpool);
       buttonPlayMediaPlayer.setOnClickListener(buttonPlayMediaPlayerOnClickListener);
       buttonPauseMediaPlayer.setOnClickListener(buttonPauseMediaPlayerOnClickListener);
       buttonPlaySoundPool.setOnClickListener(buttonPlaySoundPoolOnClickListener);
       buttonPauseSoundPool.setOnClickListener(buttonPauseSoundPoolOnClickListener);
   }
  
   Button.OnClickListener buttonPlayMediaPlayerOnClickListener
   = new Button.OnClickListener(){
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   if(!mediaPlayer.isPlaying()){
       mediaPlayer.start();
       Toast.makeText(AndroidAudioPlayer.this,
         "soundPool.pause()",
         Toast.LENGTH_LONG).show();
   }
  }
   };
  
   Button.OnClickListener buttonPauseMediaPlayerOnClickListener
   = new Button.OnClickListener(){
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   if(mediaPlayer.isPlaying()){
       mediaPlayer.pause();
       Toast.makeText(AndroidAudioPlayer.this,
         "soundPool.pause()",
         Toast.LENGTH_LONG).show();
   }
  }
   };
  
   Button.OnClickListener buttonPlaySoundPoolOnClickListener
   = new Button.OnClickListener(){
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   AudioManager audioManager = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
   float curVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
   float maxVolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
   float leftVolume = curVolume/maxVolume;
   float rightVolume = curVolume/maxVolume;
   int priority = 1;
   int no_loop = 0;
   float normal_playback_rate = 1f;
   soundPool.play(soundID, leftVolume, rightVolume, priority, no_loop, normal_playback_rate);
   
   Toast.makeText(AndroidAudioPlayer.this,
     "soundPool.play()",
     Toast.LENGTH_LONG).show();
  }
   };
  
   Button.OnClickListener buttonPauseSoundPoolOnClickListener
   = new Button.OnClickListener(){
  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   soundPool.pause(soundID);
   Toast.makeText(AndroidAudioPlayer.this,
     "soundPool.pause()",
     Toast.LENGTH_LONG).show();
  }
   };
  
}

Download the files.

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