Question

android报错java.lang.NoClassDefFoundError: com.google.zxing.client.android.R$layout

01-06 06:38:54.364: E/AndroidRuntime(209): Uncaught handler: thread main exiting due to uncaught exception
01-06 06:38:54.389: E/AndroidRuntime(209): java.lang.NoClassDefFoundError: com.google.zxing.client.android.R$layout

01-06 06:38:54.389: E/AndroidRuntime(209): at com.google.zxing.client.android.CaptureActivity.onCreate

(CaptureActivity.java:156)
01-06 06:38:54.389: E/AndroidRuntime(209): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-06 06:38:54.389: E/AndroidRuntime(209): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
01-06 06:38:54.389: E/AndroidRuntime(209): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
01-06 06:38:54.389: E/AndroidRuntime(209): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
01-06 06:38:54.389: E/AndroidRuntime(209): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
01-06 06:38:54.389: E/AndroidRuntime(209): at android.os.Handler.dispatchMessage(Handler.java:99)
01-06 06:38:54.389: E/AndroidRuntime(209): at android.os.Looper.loop(Looper.java:123)
01-06 06:38:54.389: E/AndroidRuntime(209): at android.app.ActivityThread.main(ActivityThread.java:4363)
01-06 06:38:54.389: E/AndroidRuntime(209): at java.lang.reflect.Method.invokeNative(Native Method)
01-06 06:38:54.389: E/AndroidRuntime(209): at java.lang.reflect.Method.invoke(Method.java:521)
01-06 06:38:54.389: E/AndroidRuntime(209): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
01-06 06:38:54.389: E/AndroidRuntime(209): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
01-06 06:38:54.389: E/AndroidRuntime(209): at dalvik.system.NativeStart.main(Native Method)

若以下回答无法解决问题，邀请你更新回答

Answer 1

找不到关联类，请确认是否所有的activity类都在manifast文件中注册了，然后再清理下工程就OK了

Answer 2

缺少JAR包

Answer 3

少了jar包。

Answer 4

这个是类加载先后顺序的问题，你可以调整一下引包的顺序，或者看一下依赖包是否加载。如果都不是，那就需要看一下开发环境了。

Answer 5

可能缺少jar文件，或者jar文件没有添加到classpath

Answer 6

从字面的意思是未找到该类 后边是你的路径