java - 安卓工作室 |图书馆 |添加 Kryonet 库 - NoClassDefFoundError

Question

我目前正在开发一款 Android 游戏，想要实现多人游戏。所以我想使用 Kryonet:

• 我下载了库 ( https://github.com/EsotericSoftware/kryonet/releases )
• 在我的核心模块中创建了一个 libs 文件夹
• 将 kryonet-2.21-all.jar 复制到其中

• 并将其作为模块添加到 build.gradle 中:

  dependencies {
   compile files('src/libs/kryonet-2.21-all.jar')  }
  

在 Android Studio 中它似乎工作正常，我可以访问所有导入等，但是当在我的设备上运行该应用程序时......它崩溃了

07-16 00:00:44.419  12176-12196/com.cookedapps.robotredemption.android E/AndroidRuntime﹕ FATAL EXCEPTION: GLThread 3363
Process: com.cookedapps.robotredemption.android, PID: 12176
java.lang.NoClassDefFoundError: Failed resolution of: Lcom/esotericsoftware/kryonet/Server;
        at com.cookedapps.robotredemption.server.GameServer.<init>(GameServer.java:20)
        at com.cookedapps.robotredemption.states.Play.<init>(Play.java:73)
        at com.cookedapps.robotredemption.handlers.GameStateManager.getState(GameStateManager.java:39)
        at com.cookedapps.robotredemption.handlers.GameStateManager.pushState(GameStateManager.java:49)
        at com.cookedapps.robotredemption.handlers.GameStateManager.<init>(GameStateManager.java:21)
        at com.cookedapps.robotredemption.main.Game.create(Game.java:41)
        at com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphics.java:241)
        at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1520)
        at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1248)
 Caused by: java.lang.ClassNotFoundException: Didn't find class "com.esotericsoftware.kryonet.Server" on path: DexPathList[[zip file "/data/app/com.cookedapps.robotredemption.android-2/base.apk"],nativeLibraryDirectories=[/data/app/com.cookedapps.robotredemption.android-2/lib/arm, /vendor/lib, /system/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
        at com.cookedapps.robotredemption.server.GameServer.<init>(GameServer.java:20)
        at com.cookedapps.robotredemption.states.Play.<init>(Play.java:73)
        at com.cookedapps.robotredemption.handlers.GameStateManager.getState(GameStateManager.java:39)
        at com.cookedapps.robotredemption.handlers.GameStateManager.pushState(GameStateManager.java:49)
        at com.cookedapps.robotredemption.handlers.GameStateManager.<init>(GameStateManager.java:21)
        at com.cookedapps.robotredemption.main.Game.create(Game.java:41)
        at com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphics.java:241)
        at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1520)
        at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1248)
Suppressed: java.lang.ClassNotFoundException: com.esotericsoftware.kryonet.Server
        at java.lang.Class.classForName(Native Method)
        at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
        at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
        ... 10 more
 Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

我在 cmd 和其他东西中尝试了/gradlew clean，但没有任何帮助。请给我一个提示，因为几个小时后我就卡住了。谢谢!

Answer 1

确保添加:

dependencies {
 compile files('src/libs/kryonet-2.21-all.jar') 
}

在

project(":android")

也在你的 build.gradle 文件中，不仅仅是桌面项目