抄写库错误：NoClassDefFoundError

Question

我正在尝试使用抄写库来练习创建使用OAuth的应用程序。 然而，当我尝试建立我的应用程序，我得到以下错误：

06-18 12:11:49.336: E/dalvikvm(4800): Could not find class'org.scribe.builder.ServiceBuilder', referenced from method lite.hattrick.main.LoginActivity.onCreate 
06-18 12:11:49.336: W/dalvikvm(4800): VFY: unable to resolve new-instance 783 (Lorg/scribe/builder/ServiceBuilder;) in Llite/hattrick/main/LoginActivity; 
06-18 12:11:49.336: D/dalvikvm(4800): VFY: replacing opcode 0x22 at 0x0018 
06-18 12:11:49.336: E/dalvikvm(4800): Could not find class 'org.scribe.model.Verifier', referenced from method lite.hattrick.main.LoginActivity.onResume 
06-18 12:11:49.336: W/dalvikvm(4800): VFY: unable to resolve new-instance 790 (Lorg/scribe/model/Verifier;) in Llite/hattrick/main/LoginActivity; 
06-18 12:11:49.336: D/dalvikvm(4800): VFY: replacing opcode 0x22 at 0x0029 
06-18 12:11:49.336: D/dalvikvm(4800): DexOpt: unable to opt direct call 0x18d4 at 0x1a in Llite/hattrick/main/LoginActivity;.onCreate 
06-18 12:11:49.336: D/dalvikvm(4800): DexOpt: unable to opt direct call 0x18e2 at 0x31 in Llite/hattrick/main/LoginActivity;.onResume 
06-18 12:11:49.336: I/dalvikvm(4800): DexOpt: unable to optimize static field ref 0x0ca6 at 0xcc in Llite/hattrick/main/LoginActivity;.onResume 
06-18 12:11:49.346: D/dalvikvm(4800): DexOpt: unable to opt direct call 0x18dc at 0xd0 in Llite/hattrick/main/LoginActivity;.onResume 
06-18 12:11:49.456: D/AndroidRuntime(4800): Shutting down VM 
06-18 12:11:49.456: W/dalvikvm(4800): threadid=1: thread exiting with uncaught exception (group=0x40a75228) 
06-18 12:11:49.456: E/AndroidRuntime(4800): FATAL EXCEPTION: main 
06-18 12:11:49.456: E/AndroidRuntime(4800): java.lang.NoClassDefFoundError: org.scribe.builder.ServiceBuilder 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at lite.hattrick.main.LoginActivity.onCreate(LoginActivity.java:45) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.app.Activity.performCreate(Activity.java:4543) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1071) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2158) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2237) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.app.ActivityThread.access$600(ActivityThread.java:139) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1262) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.os.Handler.dispatchMessage(Handler.java:99) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.os.Looper.loop(Looper.java:156) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at android.app.ActivityThread.main(ActivityThread.java:5005) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at java.lang.reflect.Method.invoke(Method.java:511) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
06-18 12:11:49.456: E/AndroidRuntime(4800):  at dalvik.system.NativeStart.main(Native Method) 

我真的不知道是什么，我做错了。我按照this网站的指示添加了库，下载commons-codec和scribe-1.3.0罐子。我该如何解决这个问题？

Answer 1

所有库文件必须放在一个名为libs的目录中，该目录与src和assets和res的级别相同。

创建该目录，将.jar文件放在那里，Eclipse将处理其余的部分。您不必担心将它们添加到构建路径或其他任何地方。