Google Android Compatibility Definition: Android 1.6 - Manual (Page 22)

Appendix A: Required Application Intents
NOTE: this list is provisional, and will be updated in the future.
Application Actions Schemes MIME Types
Browser android.intent.action.VIEW
http
https
(none)
text/plain
text/html
application/xhtml+xml
application/
vnd.wap.xhtml+xml
android.intent.action.WEB_SEARCH
(none)
http
https
(none)
Camera
android.media.action.IMAGE_CAPTURE
android.media.action.STILL_IMAGE_CAMERA
android.media.action.VIDEO_CAMERA
android.media.action.VIDEO_CAPTURE
android.intent.action.VIEW
android.intent.action.GET_CONTENT
android.intent.action.PICK
android.intent.action.ATTACH_DATA
vnd.android.cursor.dir/
image
vnd.android.cursor.dir/
video
image/*
video/*
android.intent.action.VIEW rtsp
android.intent.action.VIEW http
video/mp4
video/3gp
video/3gpp
video/3gpp2
Phone /
Contacts
android.intent.action.DIAL
android.intent.action.VIEW
android.intent.action.CALL
tel
android.intent.action.DIAL
android.intent.action.VIEW
vnd.android.cursor.dir/
person