[Android] [Lists] Workaround a wrong fling direction for inverted ScrollViews on Android P #21117
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| // | ||
| // Hence, we can use the absolute value from whatever the OS gives | ||
| // us and use the sign of what mOnScrollDispatchHelper has tracked. | ||
| velocityY = (int)(Math.abs(velocityY) * Math.signum(mOnScrollDispatchHelper.getYFlingVelocity())); |
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I tested this and is working, what is not so good practice in general is changing the argument value, instead create a new var. Thank you for this!
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Thanks for reviewing!
I’m away from my laptop this week, will address you comment on Monday.
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I agree with Ruben's feedback, once the PR is updated I'll try to import it :) Thanks for doing this btw 👏
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Thanks a lot!
Yeah, I agree about a variable, just wanted to make a smallest possible diff.
I fixed it and rebased to the latest master.
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We will be using this in production until it gets merged! 👍 CC: @listicos who reviewed this for us on our team! |
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Hey Igor, thanks! I'll try to trigger the import, but can't assure when it will land because this past week the FB team seemed super busy 🤷♂️ @facebook-github-bot shipit |
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…d P (#21117) Summary: This is a safe workaround to an issue in Android P: https://issuetracker.google.com/issues/112385925 It is based on a fact that even though `fling` receive a wrong sign in `velocityY`, `mOnScrollDispatchHelper.getYFlingVelocity()` still returns a fling direction. Fixes #19434 Pull Request resolved: #21117 Differential Revision: D13082740 Pulled By: hramos fbshipit-source-id: 1b28586d2c7bdcae4a111d3cead4a0455cebb99a
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…d P (facebook#21117) Summary: This is a safe workaround to an issue in Android P: https://issuetracker.google.com/issues/112385925 It is based on a fact that even though `fling` receive a wrong sign in `velocityY`, `mOnScrollDispatchHelper.getYFlingVelocity()` still returns a fling direction. Fixes facebook#19434 Pull Request resolved: facebook#21117 Differential Revision: D13082740 Pulled By: hramos fbshipit-source-id: 1b28586d2c7bdcae4a111d3cead4a0455cebb99a
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…d P (facebook#21117) Summary: This is a safe workaround to an issue in Android P: https://issuetracker.google.com/issues/112385925 It is based on a fact that even though `fling` receive a wrong sign in `velocityY`, `mOnScrollDispatchHelper.getYFlingVelocity()` still returns a fling direction. Fixes facebook#19434 Pull Request resolved: facebook#21117 Differential Revision: D13082740 Pulled By: hramos fbshipit-source-id: 1b28586d2c7bdcae4a111d3cead4a0455cebb99a
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…d P (facebook#21117) Summary: This is a safe workaround to an issue in Android P: https://issuetracker.google.com/issues/112385925 It is based on a fact that even though `fling` receive a wrong sign in `velocityY`, `mOnScrollDispatchHelper.getYFlingVelocity()` still returns a fling direction. Fixes facebook#19434 Pull Request resolved: facebook#21117 Differential Revision: D13082740 Pulled By: hramos fbshipit-source-id: 1b28586d2c7bdcae4a111d3cead4a0455cebb99a
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This is a safe workaround to an issue in Android P: https://issuetracker.google.com/issues/112385925
It is based on a fact that even though
flingreceive a wrong sign invelocityY,mOnScrollDispatchHelper.getYFlingVelocity()still returns a fling direction.Fixes #19434
Test Plan:
inverted={true}.Expected:
On Android 8 and 9 the behaviour is the same.
Release Notes:
[ANDROID] [BUGFIX] [ScrollView] - Workaround a wrong fling direction for inverted ScrollViews on Android P