StreamingFormatChecker: ML Kit has detected that you seem to pass camera frames to the detector as a Bitmap object. This is inefficient. Please use YUV_420_888 format for camera2 API or NV21 format for (legacy) camera API and directly pass down the byte array to ML Kit.
在运行 1.0.3 版本的时候，会打印如下日志：
StreamingFormatChecker: ML Kit has detected that you seem to pass camera frames to the detector as a Bitmap object. This is inefficient. Please use YUV_420_888 format for camera2 API or NV21 format for (legacy) camera API and directly pass down the byte array to ML Kit.