MediaPlayer Audio Basic Setup

package com.********.surfaceviewtest.Audio;

import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.content.res.AssetManager;
import android.media.MediaPlayer;
import android.media.SoundPool;
import android.util.Log;

import java.io.IOException;


public class Audio {

    public static Context context;
    static AssetManager am;
    static SoundPool sp;
    public static MediaPlayer mediaPlayer;
    public static boolean mediaPaused = false;

    /**
     * Create a new music player from a filepath.
     * MediaPlayer object returned is already prepared to be played
     *
     * @param file The filepath for the sound file to be streamed
     * @return reference to the Audio class MediaPlayer object
     */
    public static MediaPlayer createMusic(String file) {
        // Create new instance if necessary - prevents resource usage
        if (mediaPlayer == null) {
            mediaPlayer = new MediaPlayer();
        }

        if (am == null) {
            am = context.getAssets();
        }

        try {
            AssetFileDescriptor asset = am.openFd(file);
            mediaPlayer.setDataSource(asset.getFileDescriptor(), asset.getStartOffset(), asset.getLength());
            mediaPlayer.prepare();
        } catch (IOException e) {
            Log.e("AudioClass", "createMusic: Unable to open media from String. File not available");
        }
        return mediaPlayer;
    }

    // Release and nullify the media player to free up resources
    public static void unloadMusic() {
        if (mediaPlayer == null) {
            return;
        }
        if (mediaPlayer.isPlaying()) {
            mediaPlayer.stop();
        }
        mediaPlayer.release();
        mediaPlayer = null;
    }

    public static void onStop(boolean isFinishing) {
        // TODO Close all instanced Audio objects in Audio.onStop()
        if ((mediaPlayer != null && mediaPlayer.isPlaying()) || mediaPaused) {
            mediaPlayer.pause();
            if (isFinishing) {
                Audio.unloadMusic();
            }
        }
    }

    public static void onPause() {
        if (mediaPlayer != null && mediaPlayer.isPlaying()) {
            mediaPaused = true;
            mediaPlayer.pause();
        }
    }

    public static void onResume() {
        if (mediaPlayer != null && mediaPaused) {
            mediaPlayer.start();
            mediaPaused = false;
        }
    }

    public static void setMediaPaused(boolean pause) {
        if (pause) {
            onPause();
        } else {
            onResume();
        }
    }
}