13. Optional Hardware APIs
Android devices come in many different shapes and sizes. Some also come with extra features or hardware. Not every device comes with every supported feature, but as a developer, you should be looking to provide experiences that will work with the myriad of available devices. Working with Bluetooth, NFC, USB, and other device sensors gives your application greater functionality and usefulness. In this chapter, you learn about how this hardware is implemented into Android and some of the ways that you can leverage device features.
Bluetooth
Bluetooth support in Android has come a considerable way since it was first introduced in API level 5. This form of Bluetooth is known as Bluetooth Classic. Starting with API 18, ...
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