Android Open Source - AudioChoice Basic Media Player

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Back to project page AudioChoice.
License

The source code is released under:
Apache License
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Java Source Code

package com.hwrdprkns.audiochoice;
/* ww w .  ja  v a 2  s  .c  om*/
import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.util.Log;

import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.TimeUnit;

public class BasicMediaPlayer implements IAudioPlayer, MediaPlayer.OnBufferingUpdateListener,
        MediaPlayer.OnCompletionListener, MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener, MediaPlayer.OnInfoListener,
        MediaPlayer.OnSeekCompleteListener {

    private final static String TAG = BasicMediaPlayer.class.getSimpleName();

    protected IPlayerView viewDelegate;
    protected Context context;

    protected MediaPlayer mediaPlayer;

    protected volatile boolean shouldBePlaying; // Probably the worst race condition prone
    protected volatile boolean isPrepared;

    public BasicMediaPlayer(Context context, IPlayerView viewDelegate) {
        this.context = context;
        this.viewDelegate = viewDelegate;
    }

    @Override public void start() {
        if (getMediaPlayer().isPlaying()) return;

        try {
            shouldBePlaying = true;
            if (!isPrepared) {
                AssetFileDescriptor afd = context.getResources().openRawResourceFd(R.raw.wildfire);
                getMediaPlayer().setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
                getMediaPlayer().prepareAsync();
            } else {
                getMediaPlayer().start();
            }
        } catch (IOException e) {
            Log.d(TAG, "Exception when starting" + e.getMessage());
        }
    }

    protected MediaPlayer getMediaPlayer() {
        if (mediaPlayer == null) {
            mediaPlayer = new MediaPlayer();
            mediaPlayer.setOnPreparedListener(this);
            mediaPlayer.setOnErrorListener(this);
            mediaPlayer.setOnBufferingUpdateListener(this);
            mediaPlayer.setOnInfoListener(this);
            mediaPlayer.setOnCompletionListener(this);
            mediaPlayer.setOnSeekCompleteListener(this);
            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
        }

        return mediaPlayer;
    }

    @Override public void pause() {
        shouldBePlaying = false;
        if (getMediaPlayer().isPlaying()) {
            getMediaPlayer().pause();
        }
    }

    @Override
    public int getCurrentPosition() {
        return isPrepared ? getMediaPlayer().getCurrentPosition() : 0;
    }

    @Override
    public int getDuration() {
        return isPrepared ? getMediaPlayer().getDuration() : 0;
    }

    @Override public void seekTo(int percent) {
        getMediaPlayer().seekTo(mediaPlayer.getDuration() * percent);
    }

    @Override public boolean isPlaying() {
        return getMediaPlayer().isPlaying();
    }

    @Override public void stop() {
        if (isPrepared) {
            getMediaPlayer().stop();
            isPrepared = false;
        }
    }

    @Override public void release() {
        if (isPrepared) {
            getMediaPlayer().release();
        }
        isPrepared = false;
        mediaPlayer = null;
    }

    @Override public void reset() {
        getMediaPlayer().reset();
        isPrepared = false;
    }

    // Media Player Listeners

    @Override public void onBufferingUpdate(MediaPlayer mp, int percent) {
        // Nothing to do here since file is all in memory.
    }

    @Override public void onCompletion(MediaPlayer mp) {
        mp.reset();
    }

    @Override public boolean onError(MediaPlayer mp, int what, int extra) {
        isPrepared = false;
        return false;
    }

    @Override public boolean onInfo(MediaPlayer mp, int what, int extra) {
        return false;
    }

    @Override public void onPrepared(MediaPlayer mp) {
        isPrepared = true;
        long hours = TimeUnit.MILLISECONDS.toHours(mp.getDuration());
        Date date = new Date(mp.getDuration());
        DateFormat formatter = new SimpleDateFormat(hours > 0 ? "HH:mm:ss" : "mm:ss");
        viewDelegate.setDuration(formatter.format(date));
        if (shouldBePlaying) {
            mp.start();
        }
    }

    @Override public void onSeekComplete(MediaPlayer mp) {
    }
}
Java Source Code List
