如何在Android中使用camera2 判断相机是否可用
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摘要: 首先获取到设备等级:Float hardwareLevel = mCameraCharacteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);LEGACY < LIMITED < FULL < LEVEL_3. 越靠右边权限越大•INFO_SUPPORTED_HA... ...
目录
(为您整理了一些要点),点击可以直达。首先获取到设备等级:
Float hardwareLevel = mCameraCharacteristics.get(CameraCharacteristics.INFO_SUPPORTED_HARDWARE_LEVEL);
LEGACY < LIMITED < FULL < LEVEL_3. 越靠右边权限越大
•INFO_SUPPORTED_HARDWARE_LEVEL_LEGACY = 2
•INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED = 0
•INFO_SUPPORTED_HARDWARE_LEVEL_FULL = 1
•INFO_SUPPORTED_HARDWARE_LEVEL_3 = 3
在相应的等级下面会有各自支持的功能,LEGACY为最低权限
在LIMITED中
android.request.availableCapabilities
介绍:List of capabilities that this camera device advertises as fully supporting.
int[] ints = mCameraCharacteristics.get(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES);
Possible values:
•BACKWARD_COMPATIBLE
•MANUAL_SENSOR
•MANUAL_POST_PROCESSING
•RAW
•PRIVATE_REPROCESSING
•READ_SENSOR_SETTINGS
•BURST_CAPTURE
•YUV_REPROCESSING
•DEPTH_OUTPUT
•CONSTRAINED_HIGH_SPEED_VIDEO
这些值对应的特征值举例:
final String name3 = CaptureRequest.SENSOR_FRAME_DURATION.getName();
name3 -》android.sensor.frameDuration
列出这个的意思是,如果想知道该设备是否支持此功能,可以通过getName()获取其包名,然后在
mCameraCharacteristics.getAvailableCaptureRequestKeys();生成的队列中寻找。
如果有匹配则是可控;
CaptureRequest.LENS_FOCUS_DISTANCE;调节焦距
CaptureRequest.CONTROL_AF_MODE;自动对焦模式
CaptureRequest.SENSOR_SENSITIVITY 调节iso
CaptureRequest.CONTROL_AE_MODE 自动曝光模式
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