Solution to blank up and down imageview

Today, when I was doing an application, I found that there was a blank space in the upper and lower part of the imageview, so I knew this attribute:

Android: adjustviewbounds = "true"

If you want to add it, it means whether to maintain the aspect ratio. If you want to use maxwidth and maxheight together on the internet, otherwise it will be ineffective to use it separately. However, I have set another attribute.

Android: croptopadding

Specifies whether to intercept the specified area and use blank space instead. The setting is ineffective and must be used with scrolly:
The following is an XML property map:

Solution to blank up and down imageview