CameraControl.java
/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.camera.core;
import androidx.annotation.NonNull;
import androidx.camera.core.FocusMeteringAction.OnAutoFocusListener;
/**
* An interface for controlling camera's zoom, focus and metering across all use cases.
*
* <p>Applications can retrieve the interface via CameraX.getCameraControl.
*/
public interface CameraControl {
/**
* Starts a focus and metering action by the {@link FocusMeteringAction}.
*
* The {@link FocusMeteringAction} contains the configuration of multiple 3A
* {@link MeteringPoint}s, auto-cancel duration and{@link OnAutoFocusListener} to receive the
* auto-focus result. Check {@link FocusMeteringAction} for more details.
*
* @param action the {@link FocusMeteringAction} to be executed.
*/
void startFocusAndMetering(@NonNull FocusMeteringAction action);
/**
* Cancels current {@link FocusMeteringAction}.
*
* <p>It clears the 3A regions and update current AF mode to CONTINOUS AF (if supported).
* If auto-focus does not completes, it will notify the {@link OnAutoFocusListener} with
* isFocusLocked set to false.
*/
void cancelFocusAndMetering();
}