In the Android manifest file, what do you mean by the category Launcher and action MAIN
Is it possible to make one activity the laucher and another one the main action?
Activities will very often need to support the
CATEGORY_DEFAULT so that they can be found by
CATEGORY_DEFAULT can appear number of times.
Android does not grab whichever one appears first in the manifest but it starts with activity having
CATEGORY_LAUNCHER : The activity can be the initial activity of a task and is listed in the top-level application launcher.
For more details refer: http://developer.android.com/guide/topics/intents/intents-filters.html