AudioPlayer.java

package com.csl.liteaudioplayer.util;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.microedition.io.Connector;
import javax.microedition.io.file.FileConnection;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;

import net.rim.device.api.crypto.CryptoTokenException;
import net.rim.device.api.crypto.CryptoUnsupportedOperationException;
import net.rim.device.api.crypto.TripleDESDecryptorEngine;
import net.rim.device.api.crypto.TripleDESKey;
import net.rim.device.api.io.IOUtilities;
import net.rim.device.api.media.protocol.ByteArrayInputStreamDataSource;
import net.rim.device.api.ui.component.Dialog;

public class AudioPlayer {

    private static final AudioPlayer self = new AudioPlayer();
    private FileHolder holder;
    private Player player;
    private boolean run;
    private byte[] rawData;
    private byte[] decryptedData;

    public static synchronized AudioPlayer getInstance(){
        return self;
    }

    public void setHolder(FileHolder holder){
        this.holder = holder;
    }

    public void play(){
        try {
            String audio_path = "file:///" + holder.getPath() + holder.getFileName();
            FileConnection fc = (FileConnection) Connector.open(audio_path, Connector.READ);
            InputStream is = fc.openInputStream();
            rawData = IOUtilities.streamToBytes(is);
            playEncryptedAudio(rawData);
            is.close();
            fc.close();
        }
        catch (IOException ioex){

        }
    }



    // TEA code is taken from http://www.winterwell.com/software/TEA.php
    private void playEncryptedAudio(byte[] data) throws IOException {
//      TEA tea = new TEA("Hello world I'm a potato".getBytes());
//      byte[] decrypted_data = tea.decrypt(data);
        byte[] decrypted_data = XXTEA.decrypt(data, "12345".getBytes());
        ByteArrayInputStream stream = new ByteArrayInputStream(decrypted_data);

        ByteArrayInputStreamDataSource source = new ByteArrayInputStreamDataSource(stream, "audio/mpeg");

        try {
            player = Manager.createPlayer(source);
            player.start();
            run = true;
        }
        catch (MediaException me){
            Dialog.alert("MediaException: "+me.getMessage());
            run = false;
        }
    }

    public void stop(){
        try {
            player.stop();
            run = false;
        }
        catch (MediaException me){
            Dialog.alert("MediaException: "+me.getMessage());
            run = false;
        }
    }

    public boolean isRunning(){
        return run;
    }


    /*
     * References:
     * http://stackoverflow.com/questions/3423076/progress-bar-for-http-request-blackberry
     * http://supportforums.blackberry.com/t5/Java-Development/FileConnection-out-of-resource-problem/td-p/435606
     * http://dev.telnic.org/trac/browser/apps/blackberry/trunk/org/not/java/io/FilterInputStream.java?rev=17
     */
    protected class EncryptedAudioStream extends InputStream {

        public int read() throws IOException {
            return 0;
        }

    }
}