Files with the AIDL extension are associated with the Google Android operating system used mainly in mobile consumer electronics devices. AIDL files are used by programmers in which the rules of communication between applications in the system are defined. The AIDL file contains JAVA source code that defines the communication interface between applications running under different processes.

AIDL files are stored in the development project directory in a subfolder " src ". Each of these files is accompanied by a file with the JAVA extension, which is placed in the " bin " subfolder.