Android中关于ContentProvider类的getType()方法的理解

http://stackoverflow.com/questions/12297527/android-contentprovider-gettype-called-when-and-why

http://an-droid.diandian.com/post/2011-10-08/5638131

getType(Uri
uri)

will usually only be called after a call to

ContentResolver#getType(Uri
uri)

. It is used by applications (either other third-party applications, if your

ContentProvider

has
been exported, or your own) to retrieve the MIME type of the given content URL. If your app isn't concerned with the data's MIME type, it's perfectly fine to simply have the method

return
null

.