Java

Once your basic Android application is up and running, the next interesting thing you can add to it is the capability to communicate with the outside world. You may want your application to send an SMS message to another phone when an event happens (such as when you reach a particular geographical location), or you may wish to access a Web service that provides certain services (such as currency exchange, weather, etc.).

In this chapter, you learn how to send and receive SMS messages programmatically from within your Android application.

Excerpt from chapter 10: Accessing Android Hardware of the Wrox book Professional Android Application Development

The popularity of digital cameras (particularly within phone handsets) has caused their prices to drop just as their size has shrunk dramatically. It’s now becoming difficult to even find a mobile phone without a camera, and Android devices are unlikely to be exceptions. To access the camera hardware, you need to add the CAMERA permission to your application manifest, as shown here: 

Excerpt from Professional Java Development with the Spring Framework