when i creat a android project in eclipse, some error shows

Question

there are some error in valuse folder:

An error has occurred. See error log for more details.
java.lang.NullPointerException

Answer 1

You need to learn how to Debug in Eclipse and how to use the ADB and DDMS tools.

In order to get more details about an exception/force close you need to look for a view in Eclipse called Logcat(you will find in the DDMS perspective) there you will find a detailed traceback when/what and on what line is the issue.

For this you should read a complete article about Debugging in Android using Eclipse