autojs-camera2-自动对焦且无拉伸变形

    // 设置自动曝光模式
    mPreviewBuilder.set(
      CaptureRequest.CONTROL_AF_MODE,
      new java.lang.Integer(CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH)
    );
    // 设置自动对焦模式
    mPreviewBuilder.set(
      CaptureRequest.CONTROL_AF_MODE,
      new java.lang.Integer(CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE)
    );

    let viewWidth = mTextureView.getWidth();
    let viewHeight = mTextureView.getHeight();
    let scale = mPreViewSize.getWidth() / viewHeight;
    viewWidth *= scale;
    viewHeight *= scale;
    let matrix = new Matrix();
    let viewRect = new RectF(0, 0, viewWidth, viewHeight);
    let bufferRect = new RectF(0, 0, mPreViewSize.getHeight(), mPreViewSize.getWidth());
    matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL);
    let translateX = (mPreViewSize.getWidth() - mTextureView.getHeight()) / 2;
    matrix.postTranslate(-translateX, 0);
    mTextureView.setTransform(matrix);