Android: explain need for imageView.setImageAlpha(0)

Question

BoD opened this issue 8 years ago · 3 comments

Hi!

On Android, in order for the graphics to be correctly rendered, imageView.setImageAlpha(0); must be called on the ImageView.

This is confusing because one would expect this line to make the ImageView completely transparent!

The reason for this should be explained on the main page, or somewhere else, to avoid any confusion.

Related issues: #47 #61 #63

Answer 1 · 2017-01-21T15:38:12.000Z

Also, Keyframes has a minSdkVersion of 15, but setImageAlpha exists since 16. Even more confusion because of that :)

Answer 2 · 2017-01-21T22:50:13.000Z

It was a fix for #47, which I wasn't able to repro on my devices.

I wasn't aware setImageAlpha is API 16, so we should add a version check there

Answer 3 · 2017-01-24T04:18:56.000Z

I used ImageView.setBackgroundColor().