A Blob object represents a file-like object of immutable, raw data. Blobs represent data that isn't necessarily in a JavaScript-native format. The File interface is based on Blob, inheriting blob functionality and expanding it to support files on the user's system.
The Alarm API allows applications to schedule actions to be run in the future. For example, some applications like alarm-clock, calendar or auto-update might need to utilize the Alarm API to trigger particular device behaviors at specified time points.
This method is used to access to one of the cameras available on the device based on its identifier. You can get a list of the available cameras by calling the CameraManager.getListOfCameras() method.