apwidgets media player not working?

Hi, I downloaded the apwidgets library so I can play sounds on my android phone, but it isn't quite working. I can import the library and declare a new APMediaPlayer variable, but if I so much as try to initialize it, it crashes as soon as it launches and I get this error:

FATAL EXCEPTION: Animation Thread
Process: processing.test.android_sound_test, PID: 5490
java.lang.NoSuchMethodError: No virtual method getAssets()Landroid/content/res/AssetManager; in class Lprocessing/core/PApplet; or its super classes (declaration of 'processing.core.PApplet' appears in /data/app/processing.test.android_sound_test-1/base.apk)
    at apwidgets.APMediaPlayer.setMediaFile(APMediaPlayer.java:81)
    at processing.test.android_sound_test.android_sound_test.setup(android_sound_test.java:28)
    at processing.core.PApplet.handleDraw(Unknown Source)
    at processing.core.PGraphicsAndroid2D.requestDraw(Unknown Source)
    at processing.core.PApplet.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:762)

Here is my code, if it helps. It's basically the example in the wiki:

import apwidgets.*;
APMediaPlayer player;

void setup () {
  fullScreen ();

  player = new APMediaPlayer(this); //create new APMediaPlayer
  player.setMediaFile("Hope you have a good day.mp3"); //set the file (files are in data folder)
  player.setLooping(true); //restart playback end reached
  player.setVolume(1.0, 1.0); //Set left and right volumes. Range is from 0.0 to 1.0
  player.start(); //start play back

void draw () {
  background (0);

public void onDestroy() {
  super.onDestroy(); //call onDestroy
  if (player != null) { //must be checked because or else crash when return from landscape mode
    player.release(); //release the player


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