java.lang.NoClassDefFoundError(libgdx)

Question

一直试图使用Libgdx框架,并遇到了一些令人沮丧的问题..我正在关注一个教程,我无法运行我的项目.我究竟做错了什么？

package com.mygdx.game.android;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;

public class AndroidLauncher implements ApplicationListener {

    SpriteBatch batch;
    Texture mario;


    @Override
    public void create() {
        batch = new SpriteBatch();

        mario = new Texture(Gdx.files.internal("mario.png"));
    }

    @Override
    public void resize(int width, int height) {
        // TODO Auto-generated method stub

    }

    @Override
    public void render() {
        Gdx.gl.glClearColor(1,1,1,1);


        batch.begin();
        batch.draw(mario, 50, 50);
        batch.end();



    }

    @Override
    public void pause() {
        // TODO Auto-generated method stub

    }

    @Override
    public void resume() {
        // TODO Auto-generated method stub

    }

    @Override
    public void dispose() {
        // TODO Auto-generated method stub

    }

}

以下是我运行项目时控制台显示的内容:

Exception in thread "main" java.lang.NoClassDefFoundError: com/badlogic/gdx/jnigen/NativeCodeGenerator
    at com.badlogic.gdx.utils.GdxBuild.main(GdxBuild.java:34)
Caused by: java.lang.ClassNotFoundException: com.badlogic.gdx.jnigen.NativeCodeGenerator
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 1 more

Answer 1

我有同样的问题,但意识到我正在运行GdxBuild.确保右键单击DesktopLauncher.java> Run As> Java Application.

Answer 2

右键单击项目 - 属性 - 构建选项 - 排序和导出并检查所有 gdx 库。可能就是这样，当它在运行时找不到类时就会出现该错误。