Android + packaging + Problem

Link: http://blog.163.com/gobby_1110/blog/static/292817152011484263601/

Today, I also encountered a strange problem. After multiple times of clean, X still appeared before the project name. Because the error log was not added, I didn't know where the error was, add it in and find the following error:

(Use others to keep records and deepen your impression)

The following message is displayed when you create a project today:
Error generating final archive: Debug certificate expired on 11-5-8 mymp3player unknownandroid Packaging Problem
There is a red cross in the project.
Cause: the Google official solution is as follows:
To fix this problem, simply delete the Debug. keystore file. The default storage location for avds is in ~ /. Android/AVD on OS X and Linux, in c: \ Documents ents and Settings \. Android \ on Windows XP, and in c: \ Users \. Android \ on Windows
Vista.
The next time you build, the build tools will regenerate a new keystore and debug key
That isDelete the Debug. keystore file in the. Android folder, and then build a new Debug. keystore.. In this way, the project is created normally.
I mean it is very difficult.

If the error message "android Packaging Problem" appears, it is actually the same solution,