packages for android studio code example

Example: what are packages in android

project
|-- build.gradle
|-- settings.gradle
~
|-- common // a common library module for both mobile and wear
|   |-- build.gradle
|   |-- proguard-rules.pro
|   +-- src
|       +-- main
|           |-- AndroidManifest.xml
|           |-- assets
|           |-- java
|           |   +-- com
|           |       +-- example
|           |           +-- library // common module library package
|           |               |-- data
|           |               +-- util
|           +-- res
|
|-- mobile // mobile application module
|   |-- build.gradle
|   |-- proguard-rules.pro
|   +-- src
|       +-- main
|           |-- AndroidManifest.xml
|           |-- assets
|           |-- java
|           |   +-- com
|           |       +-- example
|           |           +-- app // mobile module application package
|           |               |-- data
|           |               |-- ui
|           |               +-- util
|           +-- res
|
+-- wear // wear application module
    |-- build.gradle
    |-- proguard-rules.pro
    +-- src
        +-- main
            |-- AndroidManifest.xml
            |-- assets
            |-- java
            |   +-- com
            |       +-- example
            |           +-- app // wear module application package
            |               |-- data
            |               |-- ui
            |               +-- util
            +-- res