title: Tween.registerAccessor NoClassDefFoundError
body: <p>i 'm a newbie for LibGDX and Android. Btw sorry for my bad English.</p>
  
  <p>Here is my problem. I just want to make a splash screen with libgdx and i watched Dustin Riley 's libGDX tutorial on youtube. But my codes doesn 't work and here is LogCat about error.</p>
  
  <pre><code>05-07 11:05:19.004: E/AndroidRuntime(838): FATAL EXCEPTION: GLThread
  05-07 11:05:19.004: E/AndroidRuntime(838): java.lang.NoClassDefFoundError: com.me.secondGame.tween.SpriteTween
  05-07 11:05:19.004: E/AndroidRuntime(838):  at com.me.secondGame.screens.SplashScreen.show(SplashScreen.java:57)
  05-07 11:05:19.004: E/AndroidRuntime(838):  at com.badlogic.gdx.Game.setScreen(Game.java:62)
  05-07 11:05:19.004: E/AndroidRuntime(838):  at com.me.secondGame.secondGame.create(secondGame.java:10)
  05-07 11:05:19.004: E/AndroidRuntime(838):  at com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphics.java:292)
  05-07 11:05:19.004: E/AndroidRuntime(838):  at com.badlogic.gdx.backends.android.surfaceview.GLSurfaceViewCupcake$GLThread.guardedRun(GLSurfaceViewCupcake.java:708)
  05-07 11:05:19.004: E/AndroidRuntime(838):  at com.badlogic.gdx.backends.android.surfaceview.GLSurfaceViewCupcake$GLThread.run(GLSurfaceViewCupcake.java:646)
  </code></pre>
  
  <p>Firstly i wrote codes and that 's work without any problem. But i added some tween codes and now it doesn 't work.</p>
  
  <p>Here is added code</p>
  
  <pre><code>Tween.registerAccessor(Sprite.class, new SpriteTween()); //MY ERROR ON HERE
  
  manager = new TweenManager();
  
  Tween.to(splashSprite, SpriteTween.ALPHA, 2f).target(1).ease(TweenEquations.easeInQuad).start(manager);
  </code></pre>
  
  <p>I guess there is a logical mistake. Because there is no error output.</p>
  
  <p>And my SpriteTween codes.</p>
  
  <pre><code>package com.me.secondGame.tween;
  
  import com.badlogic.gdx.graphics.g2d.Sprite;
  import aurelienribon.tweenengine.TweenAccessor;
  
  public class SpriteTween implements TweenAccessor&lt;Sprite&gt; {
      public static final int ALPHA = 1;
  
      @Override
      public int getValues(Sprite target, int tweenType, float[] returnValues) {
          switch (tweenType) {
          case ALPHA:
              returnValues[0] = target.getColor().a;
              return 1;
          default:
              return 0;
          }
      }
  
      @Override
      public void setValues(Sprite target, int tweenType, float[] newValues) {
          switch (tweenType) {
          case ALPHA:
              target.setColor(1, 1, 1, newValues[0]);
              break;
          }
      }
  }
  </code></pre>
  
  <p>I can 't get what is problem and now my head 's gonna blow up.</p>
  
  <p>Edited:</p>
  
  <p>After Guian 's posts i created new project with guides said. Btw i watched tutorial again.</p>
  
  <p>Thanks a lot.</p>