Parameters-Flash

Flash

Here we describe how to control the flash attached to the camera device. You will be able to check whether a flash is available, and control the modes the flash will use when capturing.

Availability

There are two availability checks associated with the flash,

  • isFlashSupported
  • isTorchSupported

These two are provided as some devices will contain a flash but not support the torch mode, and some devices may not contain a flash at all.

Torch mode is a mode where the flash is turned on permanently.

Changing Modes

You can control the mode the flash will use when capturing photos by calling the setFlashMode function on a device.

The available flash modes are defined in the CameraParameters class:

  • CameraParameters.FLASH_MODE_OFF
  • CameraParameters.FLASH_MODE_AUTO
  • CameraParameters.FLASH_MODE_ON
  • CameraParameters.FLASH_MODE_RED_EYE
  • CameraParameters.FLASH_MODE_TORCH

For example to turn the flash on permanently:

if (device.isTorchSupported())
{
device.setFlashMode( CameraParameters.FLASH_MODE_TORCH );
}