Android camera2 API - Part 4 Starting surface preview session

Please note that I don't respond to questions on the youtube channel but for those that require help I provide paid consultancy services here https://www.codementor.io/mobapptuts

Part 4 of the camera2 API tutorial series which concentrates on the initial part of creating a preview to be assigned to a camera surface.

For more info checkout - https://www.nigeapptuts.com/?p=224

Part 1 Look & Feel - https://youtu.be/dfeencf-TpM
Part 2 Surface preview sizes - https://youtu.be/D423T5JVF-s
Part 3 Surface preview session - https://youtu.be/sETiFfSPYdI

This android tutorial focuses on completing the setup for the camera2 surface preview session.
The first step is to create a camera2 surface based on the TextureView.
Then create a CaptureRequestBuilder using the CameraDevice and add the camera2 surface to the CaptureRequestBuilder.
Next use the CameraDevice to create a CameraCaptureSession and include the surface preview and capture session StateCallback as arguments.
In the CameraCaptureSession's onConfigured method setup the CaptureRequest, initialise the CameraCaptureSession member and then call the CameraCaptureSession's setRepeatingRequest method.
It also pays to setup a toast in the CameraCaptureSession's onConfigureFailed in case something has gone wrong.

API's covered:
- SurfaceTexture
- SurfaceTexture.setDefaultBufferSize
- Surface
- CaptureRequest.Builder
- CaptureRequest.Builder.build
- CaptureRequest.addTarget
- CameraDevice
- CameraDevice.createCaptureRequest
- CameraCaptureSession.StateCallback
- CameraCaptureSession.setRepeatingRequest
- CameraCaptureSession.StateCallback onConfigured
- CameraCaptureSession.StateCallback onConfigureFailed

Android studio (1.3.1) is the editor of choice (IDE) for this tutorial series.

This tutorial series is the start of what I expect to be many so I encourage comments and feedback to improve the quality and viewing experience.