Java.lang.ClassNotFoundException:Didn ' t find Class "*****activity" on Path:/data/app/*******.apk

A lot of people have appeared java.lang.RuntimeException:Unable to instantiate activity componentinfo{*****activity}: Java.lang.ClassNotFoundException:Didn ' t find Class "*****activity" on path:/data/app/*******.apk error, in Android development, I also encountered this problem, tangled up for two days, finally resolved, combined with my own online to find, is now available to everyone.

1. Manifest file registered activity name, there is no wrong, the package name is not mistaken, some netizens, may only write a class name, preceded by the point number instead, but this class is not in the default package, so reported this error, so long as the full name of the class, you can.

2. Some android, need some Third-party package, directly introduced it, in the past can be, but in the latest ADT, you must create a new Libs folder in the program, the third party jar file copy to the Libs folder, a lot of people because this is the error, In particular, the previous project, the default does not have this Libs folder, but the new version of the ADT, the default built Libs this folder.

3. It is also important that, in order and export under the Java Build Path panel, you must hook up the jar file you introduced, otherwise, as no reference, remember.

Generally is the former reason, if you can not understand, or what other reasons, please leave a message with me, to share and progress together.