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A, CameraCharacteristics

CameraCharacteristics is a property class that describes the camera device and inherits from the CameraMetadata class. For a given camera, the attributes contained in it are fixed, which is known as static metadata.

Including: Exposure compensation

Auto Exposure/Auto Focus/Auto White Balance (AE/AF/AWB mode)

Automatic Exposure/Automatic White Balance Lock (AE/AWB Lock)

AF trigger

Precapture after effects trigger

Metering Regions

Flash trigger

Exposure time

ISO Sensitivity

Frame Duration

Lens focus distance

Color Correction Matrix

JPEG metadata

Tonemap curve

Crop region

Target FPS range

Capture Intent

Hardware, such as Video stabilization.

This is explained in more detail in the official documentation

2. Obtain an instance

Inner class

By a specific KEY query the corresponding camera features, CameraCharacteristics. KEY

Four, common methods

1. T get(CameraCharacteristics.Key key)

If null is returned, the key is not set.

2. List<CameraCharacteristics.Key<? >> getKeys()

Get to camera equipment all the supported CameraCharacteristics. The Key to get a list of the Key, you can make sure we want to get the Key value is not null, the Key of the list is not allowed to be modified, Otherwise will throw UnsupportedOperationException anomalies.

3. List<CaptureRequest.Key<? >> getAvailableCaptureRequestKeys()

Gets a list of capturerequest. Key supported by the camera device.

4. List<CaptureResult.Key<? >> getAvailableCaptureResultKeys()

Get the list of captureresult. keys supported by the camera device.

5. Common fields

CONTROL_AE_AVAILABLE_MODES: list of auto exposure modes supported by the camera device

CONTROL_AF_AVAILABLE_MODES: list of auto focus modes supported by the camera device

CONTROL_AWB_AVAILABLE_MODES: list of automatic white balance modes supported by camera devices

LENS_FACING: orientation of the camera device relative to the screen

FLASH_INFO_AVAILABLE: Indicates whether the camera has a flash component

INFO_SUPPORTED_HARDWARE_LEVEL: indicates the hardware level supported by the camera