Toggle Between the Front- and Back-Facing Cameras
Most mobile Android devices come with both the front-facing and back-facing cameras. We need a UI button that toggles between the front and back camera. Let’s also activate the flash that’s built into most back-facing cameras and add an additional pair of button controls to start and stop the camera. The final app then looks like the following:
Android lists all built-in device cameras and allows us to pick the one we’d like to work with. For instance, the Nexus 6 uses the camera index ID 0 for the back-facing camera and 1 for the front-facing camera. Future Android devices might add more cameras ...
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