Telephony manager, which is part of the Android application framework, provides a telephony API to user applications. It consists of the android.telephony and android.telephony.gsm Java packages.

The Android platform provides Java framework APIs to expose the functionality of some of these native libraries to apps. For example, you can access OpenGL ES through the Android framework’s Java ...

Java development frameworks can help developers get an application up and running faster, offering code reuse and eliminating the task of building boilerplate code.

Android is based on the Linux Operating System. Your Android phone can take commands just like any Linux device Is, cd, rm, etc. Permissions to folders and applications are dependent on the Linux ...

Here, Android provides a substantial subset of the Java 5 Standard Edition packages, including Collections, I/O, and so forth. The next level up is the Application Framework layer.