Control whether a container should automatically close itself if the user touches outside of it. This only applies to activities and dialogs.

Note: this attribute will only be respected for applications that are targeting Android.OS.Build.VERSION_CODES.Honeycomb or later.

Must be a boolean value, either "true" or "false".

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

[Android Documentation]