Android Open Source - SequenceHunt Sound Manager

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License

The source code is released under:

GNU General Public License

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Java Source Code

package com.monead.games.android.sequence.sound;
//ww w  .  j  a  va2  s . c  om
import java.util.HashMap;
import java.util.Map;

import android.content.Context;
import android.media.AudioManager;
import android.media.SoundPool;

/**
 * Handles all sound interactions for the game.
 * 
 * @author David Read
 * 
 */
public final class SoundManager {
    /**
     * Singleton instance.
     */
    private static SoundManager instance;

    /**
     * The context for the sounds.
     */
    private Context context;

    /**
     * Whether sounds should be played.
     */
    private boolean soundEnabled;

    /**
     * Sound pool for game sounds.
     */
    private SoundPool sounds;

    /**
     * Relates the sound constants to the SoundPool ids.
     */
    private Map<Integer, Integer> soundMap;

    /**
     * Constructs an instance and defines the sound pool and map.
     */
    private SoundManager() {
        sounds = new SoundPool(1, AudioManager.STREAM_MUSIC, 0);
        soundMap = new HashMap<Integer, Integer>();
    }

    /**
     * Get the instance.
     * 
     * @return The sound manager instance
     */
    public static synchronized SoundManager getInstance() {
        if (instance == null) {
            instance = new SoundManager();
        }

        return instance;
    }

    /**
     * Set the context. This must be called before any sounds can be added.
     * 
     * @param pContext
     *            The context for sound file access
     */
    public void setContext(final Context pContext) {
        context = pContext;
    }

    /**
     * Add a sound to the pool of sounds.
     * 
     * @param resourceId
     *            The resource id for the sound file from the context
     */
    public void addSound(final int resourceId) {
        if (context == null) {
            throw new IllegalStateException(
                    "Set context before calling the addSound() method");
        }

        soundMap.put(resourceId, sounds.load(context, resourceId, 1));
    }

    /**
     * Play a sound that has been loaded into the sound collection.
     * 
     * @param resourceId
     *            The resource id for the sound
     */
    public void play(final int resourceId) {
        if (isSoundEnabled()) {
            sounds.play(soundMap.get(resourceId), 1.0f, 1.0f, 0, 0, 1.0f);
        }
    }

    /**
     * Set the sound mode (on/off).
     * 
     * @param pSoundEnabled
     *            True if sound is on
     */
    public void setSoundEnabled(final boolean pSoundEnabled) {
        soundEnabled = pSoundEnabled;
    }

    /**
     * Get the sound mode (on/off).
     * 
     * @return true if sound is on
     */
    public boolean isSoundEnabled() {
        return soundEnabled;
    }
}

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