更新sdk得到zxing的NoClassDefFoundError

Question

如何解决这个NoClassDefFoundError.我已经在我的应用程序中集成了Zxing,每件事都运行良好.然后我更新了我的sdk和eclipse插件,当我运行项目时,日志说

03-27 17:27:45.173: E/AndroidRuntime(8917): FATAL EXCEPTION: main
03-27 17:27:45.173: E/AndroidRuntime(8917): java.lang.ExceptionInInitializerError
03-27 17:27:45.173: E/AndroidRuntime(8917):     at java.lang.Class.newInstanceImpl(Native Method)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at java.lang.Class.newInstance(Class.java:1429)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.os.Looper.loop(Looper.java:123)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at android.app.ActivityThread.main(ActivityThread.java:4627)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at java.lang.reflect.Method.invokeNative(Native Method)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at java.lang.reflect.Method.invoke(Method.java:521)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-27 17:27:45.173: E/AndroidRuntime(8917):     at dalvik.system.NativeStart.main(Native Method)
03-27 17:27:45.173: E/AndroidRuntime(8917): Caused by: java.lang.NoClassDefFoundError: com.google.zxing.ResultMetadataType
03-27 17:27:45.173: E/AndroidRuntime(8917):     at records.model.CaptureActivity.<clinit>(CaptureActivity.java:94)`

Answer 1

我没有把jar文件库放在资产或lib中,但只在"属性" - >"Java构建路径" - >"订单和导出"中勾选此jar的框(之前已列出,但未选中) )

您可能必须在此之后执行项目>清理才能生效!(感谢mwengler和穆罕默德)

Answer 2

转到属性 - > Java构建路径 - >"订单和导出"

然后将core.jar命令到第一个位置并选择它!

您必须在操作后清理项目.项目 - >清洁

这将解决问题