ADT 17+ 引入jar包导致的运行时异常_no existing instrumentation found. loading instrum-优快云博客

本文链接：https://blog.youkuaiyun.com/ljchlx/article/details/7570577

本文介绍了一种解决在Android应用中因ACRA引发的NoClassDefFoundError错误的方法，通过调整项目的Java构建路径及重命名库文件夹，确保所有依赖库能被正确加载。

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http://tools.android.com/recent/dealingwithdependenciesinandroidprojects

http://android.foxykeep.com/dev/how-to-fix-the-classdefnotfounderror-with-adt-17

03-21 19:20:56.455: E/AndroidRuntime(24471): FATAL EXCEPTION: main
03-21 19:20:56.455: E/AndroidRuntime(24471): java.lang.NoClassDefFoundError: org.acra.ACRA
03-21 19:20:56.455: E/AndroidRuntime(24471): at com.foxykeep.myproject.HomeActivity.onCreate(MyProjectApplication.java:127)
03-21 19:20:56.455: E/AndroidRuntime(24471): at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:969)
03-21 19:20:56.455: E/AndroidRuntime(24471): at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3925)
03-21 19:20:56.455: E/AndroidRuntime(24471): at android.app.ActivityThread.access$1300(ActivityThread.java:122)
03-21 19:20:56.455: E/AndroidRuntime(24471): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1184)
03-21 19:20:56.455: E/AndroidRuntime(24471): at android.os.Handler.dispatchMessage(Handler.java:99)
03-21 19:20:56.455: E/AndroidRuntime(24471): at android.os.Looper.loop(Looper.java:137)
03-21 19:20:56.455: E/AndroidRuntime(24471): at android.app.ActivityThread.main(ActivityThread.java:4340)
03-21 19:20:56.455: E/AndroidRuntime(24471): at java.lang.reflect.Method.invokeNative(Native Method)
03-21 19:20:56.455: E/AndroidRuntime(24471): at java.lang.reflect.Method.invoke(Method.java:511)
03-21 19:20:56.455: E/AndroidRuntime(24471): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
03-21 19:20:56.455: E/AndroidRuntime(24471): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
03-21 19:20:56.455: E/AndroidRuntime(24471): at dalvik.system.NativeStart.main(Native Method)

What I did to fix the bug was :

Remove the libraries from the standard Java build path :
- Right click on the project name > Properties > Java Build Path > tab Libraries > remove everything except the “Android X.X” (2.3.3 in my case) and the “Android Dependencies”
Rename the libraries folder from “lib” to “libs”
- By doing that, all the libraries in the folder “libs” are found by the Android plugin and are added to the “Android Dependencies” item of the project
Clean the project (not exactly needed)