Android is rich in file features and it provides lots of variations in them as well. The file features are as follows:

Intent filters:

Includes bundle of information which describes a desired action.

Icons and Labels:

Includes information for small icon and a text label that can be displayed to users. These are set for an intent filter and are used to represent a component which fulfills the function advertised by the filter.

Permissions:

It is a restriction or limitation access to a part of code or data on the device. It is given as:-android.permission.CALL_EMERGENCY_NUMBERS

Libraries:

It includes the basic packages for building and developing applications.