public
static
abstract
class
CameraManager.TorchCallback
extends Object
java.lang.Object | |
↳ | android.hardware.camera2.CameraManager.TorchCallback |
A callback for camera flash torch modes becoming unavailable, disabled, or enabled.
The torch mode becomes unavailable when the camera device it belongs to becomes
unavailable or other camera resources it needs become busy due to other higher priority
camera activities. The torch mode becomes disabled when it was turned off or when the camera
device it belongs to is no longer in use and other camera resources it needs are no longer
busy. A camera's torch mode is turned off when an application calls setTorchMode(String, boolean)
to
turn off the camera's torch mode, or when an application turns on another camera's torch mode
if keeping multiple torch modes on simultaneously is not supported. The torch mode becomes
enabled when it is turned on via setTorchMode(String, boolean)
.
The torch mode is available to set via setTorchMode(String, boolean)
only when it's in a disabled
or enabled state.
Extend this callback and pass an instance of the subclass to
registerTorchCallback(CameraManager.TorchCallback, Handler)
to be notified of such status changes.
Public constructors | |
---|---|
CameraManager.TorchCallback()
|
Public methods | |
---|---|
void
|
onTorchModeChanged(String cameraId, boolean enabled)
A camera's torch mode has become enabled or disabled and can be changed via
|
void
|
onTorchModeUnavailable(String cameraId)
A camera's torch mode has become unavailable to set via |
Inherited methods | |
---|---|
From
class
java.lang.Object
|
void onTorchModeChanged (String cameraId, boolean enabled)
A camera's torch mode has become enabled or disabled and can be changed via
setTorchMode(String, boolean)
.
The default implementation of this method does nothing.
Parameters | |
---|---|
cameraId |
String :
The unique identifier of the camera whose torch mode has been changed. |
enabled |
boolean :
The state that the torch mode of the camera has been changed to.
true when the torch mode has become on and available to be turned
off. false when the torch mode has becomes off and available to
be turned on.
|
void onTorchModeUnavailable (String cameraId)
A camera's torch mode has become unavailable to set via setTorchMode(String, boolean)
.
If torch mode was previously turned on by calling setTorchMode(String, boolean)
, it will be
turned off before onTorchModeUnavailable(String)
is
invoked. setTorchMode(String, boolean)
will fail until the torch mode has entered a disabled or
enabled state again.
The default implementation of this method does nothing.
Parameters | |
---|---|
cameraId |
String :
The unique identifier of the camera whose torch mode has become
unavailable.
|