CameraHelper.java 文件源码

/**
 * does setup the repeating capture request for taking images for the preview
 */
@VisibleForTesting
void setupCaptureRequestForPreview(@NonNull CameraCaptureSession previewSession, @NonNull CameraDevice camera,
                                   @NonNull List<Surface> surfaces) {
    try {
        CaptureRequest.Builder previewRequestBuilder = camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
        for (Surface surface : surfaces) {
            previewRequestBuilder.addTarget(surface);
        }
        previewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);

        previewSession.setRepeatingRequest(previewRequestBuilder.build(), null, null);

    } catch (CameraAccessException | IllegalStateException e) {
        throw new CameraException(e);
    }
}