在Android上使用IntelliJ编写的Scala中的LibGDX项目(LibGDX project written in Scala, on Android, using IntelliJ)

在Android上使用IntelliJ编写的Scala中的LibGDX项目(LibGDX project written in Scala, on Android, using IntelliJ) java

因此，在使用本教程进行设置后，我一直在使用Scala在IntelliJ v12.1.6中开发LibGDX项目： http ://www.gamefromscratch.com/post/2013/12/01/Using-LibGDX-with-IntelliJ -with-Gradle.aspx 。 不过，我注意到，在Android设备上测试游戏时，我收到以下错误消息

12-04 17:46:22.483: ERROR/AndroidRuntime(18951): FATAL EXCEPTION: GLThread 475 Process: com.voliant.rsoss, PID: 18951 java.lang.NoClassDefFoundError: scala.Predef$ at com.voliant.rsoss.Actors.Player.act(Player.scala:20) at com.badlogic.gdx.scenes.scene2d.Group.act(Group.java:48) at com.badlogic.gdx.scenes.scene2d.Stage.act(Stage.java:225) at com.badlogic.gdx.scenes.scene2d.Stage.act(Stage.java:189) at com.voliant.rsoss.Screens.GameScreen.render(GameScreen.scala:46) at com.badlogic.gdx.Game.render(Game.java:46) at com.badlogic.gdx.backends.android.AndroidGraphics.onDrawFrame(AndroidGraphics.java:499) at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1523) at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1240)

每当我尝试使用Scala本地方法（如标准println（）方法）时。

我怀疑android类找不到Scala使用的类，所以我试图用Scala库导出android项目。 然而，每当我尝试这个，我得到一个错误，我有太多的方法， （类似于这个） ，这是有道理的，因为斯卡拉在项目中引入了足够多的方法来保证这个错误。

我的问题是我怎样才能让android项目意识到Scala类和方法，以便我可以像在桌面项目中一样有效地在android项目中使用它们？

谢谢！

So I've been working on a LibGDX project in IntelliJ v12.1.6 using Scala after getting set up using this tutorial: http://www.gamefromscratch.com/post/2013/12/01/Using-LibGDX-with-IntelliJ-with-Gradle.aspx. However I've noticed, when testing the game on my android device, I receive the following error

12-04 17:46:22.483: ERROR/AndroidRuntime(18951): FATAL EXCEPTION: GLThread 475 Process: com.voliant.rsoss, PID: 18951 java.lang.NoClassDefFoundError: scala.Predef$ at com.voliant.rsoss.Actors.Player.act(Player.scala:20) at com.badlogic.gdx.scenes.scene2d.Group.act(Group.java:48) at com.badlogic.gdx.scenes.scene2d.Stage.act(Stage.java:225) at com.badlogic.gdx.scenes.scene2d.Stage.act(Stage.java:189) at com.voliant.rsoss.Screens.GameScreen.render(GameScreen.scala:46) at com.badlogic.gdx.Game.render(Game.java:46) at com.badlogic.gdx.backends.android.AndroidGraphics.onDrawFrame(AndroidGraphics.java:499) at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1523) at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1240)

Whenever I attempt to utilize a method that's native to Scala (such as the standard println() method).

I suspected that the android class could not find the classes utilized by Scala, so I attempted to export the android project with the Scala library. Whenever I try this however, I get an error that I have too many methods, (similar to this) which would make sense as Scala introduces well over enough methods into the project to warrant this error.

My question is how could I make the android project aware of the Scala classes and methods, so that I could use them as effectively in the android project as I have been able to in the desktop project?

Thanks!

最满意答案

好吧，看来我已经能够解决我的问题了。

我能够使用ProGuard减少我的项目使用的方法，Scala现在可以按照预期在android上运行。 我遇到了一些与LibGDX本身实际上的矛盾，但设法弄清楚如何将它添加到配置。 （当然有一点谷歌的帮助）

对于有同样问题的其他人，这里是我用来帮助提出解决方案的ProGuard cfg和链接。 快乐编码！

https://github.com/yareally/android-scala-intellij-no-sbt-plugin

-dontwarn scala.** -dontwarn java.awt.** -dontnote java.awt.** -dontwarn com.badlogic.gdx.jnigen.** -dontwarn com.badlogic.gdx.backends.android.AndroidDaydream -dontwarn com.badlogic.gdx.backends.android.AndroidInputThreePlus -dontwarn com.badlogic.gdx.backends.android.AndroidGraphicsDaydream -keepclasseswithmembers public class * { public static void main(java.lang.String[]); } -keep class * implements org.xml.sax.EntityResolver -keepclassmembers class * { ** MODULE$; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinPool { long eventCount; int workerCounts; int runControl; scala.concurrent.forkjoin.ForkJoinPool$WaitQueueNode syncStack; scala.concurrent.forkjoin.ForkJoinPool$WaitQueueNode spareStack; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinWorkerThread { int base; int sp; int runState; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinTask { int status; } -keepclassmembernames class scala.concurrent.forkjoin.LinkedTransferQueue { scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference head; scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference tail; scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference cleanMe; } -keep class com.badlogic.gdx.backends.android.AndroidInput { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidInputFactory { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidInputThreePlus { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidApplicationConfiguration { public protected private *; } -keepclasseswithmembernames class * { native <methods>; } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet); } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet, int); } -keepclassmembers class * extends android.app.Activity { public void *(android.view.View); } -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } -keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *; }

Alright, It appears I've been able to resolve my issue.

I was able to use ProGuard to cut down the methods used by my projects, and Scala is now operating as expected on android. I ran into a bit of a snag with LibGDX itself actually, but managed to figure out how to add it to the config as well. (with a little help from google of course)

For anyone else who has the same problem, here's my ProGuard cfg and links I used to help come up with a solution. Happy Coding!

https://github.com/yareally/android-scala-intellij-no-sbt-plugin

-dontwarn scala.** -dontwarn java.awt.** -dontnote java.awt.** -dontwarn com.badlogic.gdx.jnigen.** -dontwarn com.badlogic.gdx.backends.android.AndroidDaydream -dontwarn com.badlogic.gdx.backends.android.AndroidInputThreePlus -dontwarn com.badlogic.gdx.backends.android.AndroidGraphicsDaydream -keepclasseswithmembers public class * { public static void main(java.lang.String[]); } -keep class * implements org.xml.sax.EntityResolver -keepclassmembers class * { ** MODULE$; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinPool { long eventCount; int workerCounts; int runControl; scala.concurrent.forkjoin.ForkJoinPool$WaitQueueNode syncStack; scala.concurrent.forkjoin.ForkJoinPool$WaitQueueNode spareStack; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinWorkerThread { int base; int sp; int runState; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinTask { int status; } -keepclassmembernames class scala.concurrent.forkjoin.LinkedTransferQueue { scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference head; scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference tail; scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference cleanMe; } -keep class com.badlogic.gdx.backends.android.AndroidInput { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidInputFactory { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidInputThreePlus { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidApplicationConfiguration { public protected private *; } -keepclasseswithmembernames class * { native <methods>; } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet); } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet, int); } -keepclassmembers class * extends android.app.Activity { public void *(android.view.View); } -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } -keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *; }在Android上使用IntelliJ编写的Scala中的LibGDX项目(LibGDX project written in Scala, on Android, using IntelliJ) java

因此，在使用本教程进行设置后，我一直在使用Scala在IntelliJ v12.1.6中开发LibGDX项目： http ://www.gamefromscratch.com/post/2013/12/01/Using-LibGDX-with-IntelliJ -with-Gradle.aspx 。 不过，我注意到，在Android设备上测试游戏时，我收到以下错误消息

12-04 17:46:22.483: ERROR/AndroidRuntime(18951): FATAL EXCEPTION: GLThread 475 Process: com.voliant.rsoss, PID: 18951 java.lang.NoClassDefFoundError: scala.Predef$ at com.voliant.rsoss.Actors.Player.act(Player.scala:20) at com.badlogic.gdx.scenes.scene2d.Group.act(Group.java:48) at com.badlogic.gdx.scenes.scene2d.Stage.act(Stage.java:225) at com.badlogic.gdx.scenes.scene2d.Stage.act(Stage.java:189) at com.voliant.rsoss.Screens.GameScreen.render(GameScreen.scala:46) at com.badlogic.gdx.Game.render(Game.java:46) at com.badlogic.gdx.backends.android.AndroidGraphics.onDrawFrame(AndroidGraphics.java:499) at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1523) at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1240)

每当我尝试使用Scala本地方法（如标准println（）方法）时。

我怀疑android类找不到Scala使用的类，所以我试图用Scala库导出android项目。 然而，每当我尝试这个，我得到一个错误，我有太多的方法， （类似于这个） ，这是有道理的，因为斯卡拉在项目中引入了足够多的方法来保证这个错误。

我的问题是我怎样才能让android项目意识到Scala类和方法，以便我可以像在桌面项目中一样有效地在android项目中使用它们？

谢谢！

So I've been working on a LibGDX project in IntelliJ v12.1.6 using Scala after getting set up using this tutorial: http://www.gamefromscratch.com/post/2013/12/01/Using-LibGDX-with-IntelliJ-with-Gradle.aspx. However I've noticed, when testing the game on my android device, I receive the following error

12-04 17:46:22.483: ERROR/AndroidRuntime(18951): FATAL EXCEPTION: GLThread 475 Process: com.voliant.rsoss, PID: 18951 java.lang.NoClassDefFoundError: scala.Predef$ at com.voliant.rsoss.Actors.Player.act(Player.scala:20) at com.badlogic.gdx.scenes.scene2d.Group.act(Group.java:48) at com.badlogic.gdx.scenes.scene2d.Stage.act(Stage.java:225) at com.badlogic.gdx.scenes.scene2d.Stage.act(Stage.java:189) at com.voliant.rsoss.Screens.GameScreen.render(GameScreen.scala:46) at com.badlogic.gdx.Game.render(Game.java:46) at com.badlogic.gdx.backends.android.AndroidGraphics.onDrawFrame(AndroidGraphics.java:499) at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1523) at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1240)

Whenever I attempt to utilize a method that's native to Scala (such as the standard println() method).

I suspected that the android class could not find the classes utilized by Scala, so I attempted to export the android project with the Scala library. Whenever I try this however, I get an error that I have too many methods, (similar to this) which would make sense as Scala introduces well over enough methods into the project to warrant this error.

My question is how could I make the android project aware of the Scala classes and methods, so that I could use them as effectively in the android project as I have been able to in the desktop project?

Thanks!

最满意答案

好吧，看来我已经能够解决我的问题了。

我能够使用ProGuard减少我的项目使用的方法，Scala现在可以按照预期在android上运行。 我遇到了一些与LibGDX本身实际上的矛盾，但设法弄清楚如何将它添加到配置。 （当然有一点谷歌的帮助）

对于有同样问题的其他人，这里是我用来帮助提出解决方案的ProGuard cfg和链接。 快乐编码！

https://github.com/yareally/android-scala-intellij-no-sbt-plugin

-dontwarn scala.** -dontwarn java.awt.** -dontnote java.awt.** -dontwarn com.badlogic.gdx.jnigen.** -dontwarn com.badlogic.gdx.backends.android.AndroidDaydream -dontwarn com.badlogic.gdx.backends.android.AndroidInputThreePlus -dontwarn com.badlogic.gdx.backends.android.AndroidGraphicsDaydream -keepclasseswithmembers public class * { public static void main(java.lang.String[]); } -keep class * implements org.xml.sax.EntityResolver -keepclassmembers class * { ** MODULE$; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinPool { long eventCount; int workerCounts; int runControl; scala.concurrent.forkjoin.ForkJoinPool$WaitQueueNode syncStack; scala.concurrent.forkjoin.ForkJoinPool$WaitQueueNode spareStack; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinWorkerThread { int base; int sp; int runState; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinTask { int status; } -keepclassmembernames class scala.concurrent.forkjoin.LinkedTransferQueue { scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference head; scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference tail; scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference cleanMe; } -keep class com.badlogic.gdx.backends.android.AndroidInput { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidInputFactory { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidInputThreePlus { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidApplicationConfiguration { public protected private *; } -keepclasseswithmembernames class * { native <methods>; } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet); } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet, int); } -keepclassmembers class * extends android.app.Activity { public void *(android.view.View); } -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } -keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *; }

Alright, It appears I've been able to resolve my issue.

I was able to use ProGuard to cut down the methods used by my projects, and Scala is now operating as expected on android. I ran into a bit of a snag with LibGDX itself actually, but managed to figure out how to add it to the config as well. (with a little help from google of course)

For anyone else who has the same problem, here's my ProGuard cfg and links I used to help come up with a solution. Happy Coding!

https://github.com/yareally/android-scala-intellij-no-sbt-plugin

-dontwarn scala.** -dontwarn java.awt.** -dontnote java.awt.** -dontwarn com.badlogic.gdx.jnigen.** -dontwarn com.badlogic.gdx.backends.android.AndroidDaydream -dontwarn com.badlogic.gdx.backends.android.AndroidInputThreePlus -dontwarn com.badlogic.gdx.backends.android.AndroidGraphicsDaydream -keepclasseswithmembers public class * { public static void main(java.lang.String[]); } -keep class * implements org.xml.sax.EntityResolver -keepclassmembers class * { ** MODULE$; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinPool { long eventCount; int workerCounts; int runControl; scala.concurrent.forkjoin.ForkJoinPool$WaitQueueNode syncStack; scala.concurrent.forkjoin.ForkJoinPool$WaitQueueNode spareStack; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinWorkerThread { int base; int sp; int runState; } -keepclassmembernames class scala.concurrent.forkjoin.ForkJoinTask { int status; } -keepclassmembernames class scala.concurrent.forkjoin.LinkedTransferQueue { scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference head; scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference tail; scala.concurrent.forkjoin.LinkedTransferQueue$PaddedAtomicReference cleanMe; } -keep class com.badlogic.gdx.backends.android.AndroidInput { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidInputFactory { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidInputThreePlus { public protected private *; } -keep class com.badlogic.gdx.backends.android.AndroidApplicationConfiguration { public protected private *; } -keepclasseswithmembernames class * { native <methods>; } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet); } -keepclasseswithmembers class * { public <init>(android.content.Context, android.util.AttributeSet, int); } -keepclassmembers class * extends android.app.Activity { public void *(android.view.View); } -keepclassmembers enum * { public static **[] values(); public static ** valueOf(java.lang.String); } -keep class * implements android.os.Parcelable { public static final android.os.Parcelable$Creator *; }