ViewPort.Builder
public
static
final
class
ViewPort.Builder
extends Object
java.lang.Object | |
↳ | androidx.camera.core.ViewPort.Builder |
Builder for ViewPort
.
Summary
Public constructors | |
---|---|
Builder(Rational aspectRatio, int rotation)
Creates |
Public methods | |
---|---|
ViewPort
|
build()
Builds the |
Inherited methods | |
---|---|
Public constructors
Builder
public Builder (Rational aspectRatio, int rotation)
Creates ViewPort.Builder
with aspect ratio and rotation.
To create a ViewPort
that is based on the Preview
use
case, the aspect ratio should be the dimension of the View
and
the rotation should be the value of Preview.getTargetRotation()
:
val aspectRatio = Rational(viewFinder.width, viewFinder.height)
val viewport = ViewPort.Builder(aspectRatio, preview.getTargetRotation()).build()
In a scenario where Preview
is not used, for example, face detection in
ImageAnalysis
and taking pictures with ImageCapture
when faces are
found, the ViewPort
should be created with the aspect ratio and rotation of the
ImageCapture
use case.
Parameters | |
---|---|
aspectRatio |
Rational : aspect ratio of the output crop rect if the scale type
is FILL_START, FILL_CENTER or FILL_END. This is usually the
width/height of the preview viewfinder that displays the camera
feed. The value is ignored if the scale type is FIT. |
rotation |
int : The rotation value is one of four valid values:
Surface.ROTATION_0 , Surface.ROTATION_90 ,
Surface.ROTATION_180 , Surface.ROTATION_270 .
|