CameraProvider.java
/*
* Copyright 2021 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.annotation.RestrictTo;
import java.util.List;
/**
* Provides access to a set of cameras.
*
* @hide
*/
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
public interface CameraProvider {
/**
* Checks whether this provider supports at least one camera that meets the requirements from a
* {@link CameraSelector}.
*
* <p>If this method returns {@code true}, then the camera selector can be used to bind
* use cases and retrieve a {@link Camera} instance.
*
* @param cameraSelector the {@link CameraSelector} that filters available cameras.
* @return true if the device has at least one available camera, otherwise false.
* @throws CameraInfoUnavailableException if unable to access cameras, perhaps due to
* insufficient permissions.
*/
boolean hasCamera(@NonNull CameraSelector cameraSelector) throws CameraInfoUnavailableException;
/**
* Returns {@link CameraInfo} instances of the available cameras.
*
* <p>The available cameras include all the available cameras on the device, or only those
* selected through
* {@link androidx.camera.core.CameraXConfig.Builder#setAvailableCamerasLimiter(CameraSelector)}
*
* @return A list of {@link CameraInfo} instances for the available cameras.
*/
@NonNull
List<CameraInfo> getAvailableCameraInfos();
}