android - Image metadata MediaStore vs. EXIF

Question

In Android there seems to be two different way of reading an image's metadata. I know that image's EXIF has data such as timestamp, orientation, gps tag, etc on it, but apparently, you could get the same information through MediaStore, per Android's documentation: developer.android.com/reference/android/provider/MediaStore.Images.ImageColumns.html

What's the difference between the two? Can it be safely assumed that data from both will ALWAYS be the same?

Answer 1

两者有什么区别？

该MediaStore信息包含一些 EXIF 数据的缓存副本，以及其他元数据。

可以安全地假设两者的数据总是相同的吗？

不。如果是MediaStore最新的，那么是的。但是，图像是文件。可以更改文件。如果MediaStore索引图像文件处于状态 A，那么某些东西会将图像文件修改为状态 B，除非某些东西导致MediaStore更新其缓存，否则它们将不同步。