Shortest distance from frontmost surface of the lens that can be
brought into sharp focus.

If the lens is fixed-focus,this will be 0.

http://developer.android.com/intl/es/reference/android/hardware/camera2/CameraCharacteristics.html

换句话说,如果您想要管理焦点,请记住LENS_INFO_MINIMUM_FOCUS_DISTANCE为您提供最小焦点,但要获得“最大”焦点,您必须使用LENS_INFO_HYPERFOCAL_DISTANCE.

float yourMinFocus = mCameraCharacteristics.get(CameraCharacteristics.LENS_INFO_MINIMUM_FOCUS_DISTANCE);
float yourMaxFocus = mCameraCharacteristics.get(CameraCharacteristics.LENS_INFO_HYPERFOCAL_DISTANCE);