Android Open Source - OpenHSK Sound Manager

From Project

Back to project page OpenHSK.

License

The source code is released under:

This work is licensed under a Creative Commons Attribution 3.0 Unported License. Original author of word lists: http://lingomi.com/ Original author of definitions: http://cc-cedict.org Original autho...

If you think the Android project OpenHSK listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

package edu.openhsk.utils;
//  w ww  .ja va2s .c om
import java.util.HashMap;

import android.content.res.AssetFileDescriptor;
import android.content.res.AssetManager;
import android.media.AudioManager;
import android.media.SoundPool;
import android.media.SoundPool.OnLoadCompleteListener;
import android.util.Log;

public class SoundManager {
  private static final String LOG_TAG = SoundManager.class.getSimpleName();

  //SoundPool playback constants
  private static final int STREAM_ERROR = 0;
  private static final float RATE = 1f;
  private static final int LOOP = 0;
  private static final int PRIORITY = 1;
  private static final float RIGHT_VOLUME = 1f;
  private static final float LEFT_VOLUME = 1f;

  private SoundPool soundPool;
  private String filePath = "hsk1_sounds/";

  /** This hashmap maps soundfiles to soundId's. */
  private HashMap<String, Integer> soundMap;
  private final AssetManager assetManager;

  public SoundManager(AssetManager assetManager) {
    this.assetManager = assetManager;
    soundPool = new SoundPool(3, AudioManager.STREAM_MUSIC, 0);
    soundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
      public void onLoadComplete(SoundPool soundPool, int sampleId, int status) {
        if (status == 0 && sampleId != 0) {
          if (soundPool.play(sampleId, LEFT_VOLUME, 
              RIGHT_VOLUME, PRIORITY, LOOP, 
                RATE) == STREAM_ERROR) {
            Log.e(LOG_TAG, "Playback error for file with " +
                "soundId " + sampleId);
          }
        } else {
          Log.e(LOG_TAG, "Soundpool error, status code: " + status);
        }
      }
    });
    
    soundMap = new HashMap<String, Integer>();
  }
  
  public SoundManager(AssetManager assetManager, String filePath) {
    this(assetManager);
    this.filePath = filePath;
  }
  
  public void playSoundFile(String filename) {
    try {
      int soundID = 0;
      try {
        soundID = soundMap.get(filename);
        if (soundID == 0) {
          throw new Exception("Error loading soundfile " + filename);
        }
        if (soundPool.play(soundID, LEFT_VOLUME, RIGHT_VOLUME, 
            PRIORITY, LOOP, RATE) == STREAM_ERROR) {
          throw new Exception("Playback error for file " + 
            filename + " with soundId " + soundID);
        }
        Log.d(LOG_TAG, "Played file: " + filePath + filename);
      } catch (NullPointerException e) {
        soundID = loadSound(filename);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  private int loadSound(String filename) {
    AssetFileDescriptor afd;
    try {
      afd = assetManager.openFd(filePath  + filename);
      int soundId = soundPool.load(afd, PRIORITY);
      if (soundId != 0) {
        soundMap.put(filename, soundId);
        return soundId;
      } else {
        Log.e(LOG_TAG, "Error loading file " + filename + 
            " into soundpool");
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
    return 0;
  }
}

Java Source Code List