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