Is it a bad practice to use negative margins in Android?

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In 2010, @RomainGuy (core Android engineer) stated that negative margins had unspecified behavior.

In 2011, @RomainGuy stated that you can use negative margins on LinearLayout and RelativeLayout.

In 2016, @RomainGuy stated that they have never been officially supported and won’t be supported by ConstraintLayout.

It is easy to work around this limitation though.

Add a helper view (height 0dp, width constrained to parent) at the bottom of your base view, at the bottom add the margin you want.
Then position your view below this one, effectively allowing it to have a “negative” margin but without having to use any unsupported negative value.

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