问如何将Android摄像头2设置为18.5：9？

EN

public void createCameraPreviewSession() {
    try {
        SurfaceTexture texture = this.getSurfaceTexture();
        assert texture != null;
        texture.setDefaultBufferSize(previewSize.getWidth(), previewSize.getHeight());
        Surface surface = new Surface(texture);
        previewBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
        previewBuilder.addTarget(surface);
        cameraDevice.createCaptureSession(Arrays.asList(surface, reader.getSurface()),
                new CameraCaptureSession.StateCallback() {
                    @Override
                    public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
                        if (null == cameraDevice) {
                            return;
                        }
                        previewSession = cameraCaptureSession;
                        thread = new HandlerThread("CameraPreview");
                        thread.start();
                        backgroundHandler = new Handler(thread.getLooper());
                        try {
                      previewBuilder.set(CaptureRequest.CONTROL_AF_MODE,CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
              previewSession.setRepeatingRequest(previewBuilder.build(), null, backgroundHandler);
                        } catch (CameraAccessException e) {
                            e.printStackTrace();
                        }
                    }
                    @Override
                    public void onConfigureFailed(
                            @NonNull CameraCaptureSession cameraCaptureSession) {
                    }
                }, null
        );
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}