When this problem occurred
1. Just try to kill adb process that still running.


#ps aux | grep adb

#kill -9 xxxx

and restart eclipse.

When you got error
"The serializable class XXXX does not declare a static final serialVersionUID field of type long."

try to ...
1. add serialVersionID field into the class.

When trying to build big project the error,
Java Heap Space
just occurred. Try to set ...

Window -> Preferences -> Java -> Installed JREs ->Edit