我们很高兴地宣布 ConstraintLayout 2.0 beta 5 发布了。
它可以从谷歌的 maven 仓库中获取:
dependencies {
implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta5'
}
或者使用 android.support 包:
dependencies {
implementation 'com.android.support.constraint:constraint-layout:2.0.0-beta5'
}
文档：https://developer.android.google.cn/reference/androidx/constraintlayout/widget/ConstraintLayout
代码示例：https://github.com/android/views-widgets-samples/tree/master/ConstraintLayoutExamples
Bug 修复
我们在 beta 5中修复了几个问题——建议在使用旧版本的进行升级，特别是已经在使用 MotionLayout 的。
| [2.0.0-beta4] First tap lost in a scrolling view contained in a MotionLayout | 146413738 |
| ConstraintLayout Group - Changing visibility when using INVISIBLE doesn't work correctly | 130524019 |
| [MotionLayout] - NestedScrollView + RecyclerView + variable size header on click | 138035155 |
| [MotionLayout] does not expand to wrap content inside RecyclerView item | 138312805 |
| MotionLayout drag doesn't work after fling in RecyclerView | 141319444 |
| Flow : Set only vertical style, but applied both vertical and horizontal style | 141809028 |
| CustomView as part of a CollapsibleToolbar (MotionLayout) extends beyond it's bounds when scrolling up | 143971662 |
| Flow doesn't handle gaps correctly with wrapMode=chain | 144298723 |
| MotionLayout packed horizontal chain style does not work for RTL locales | 144301446 |
| Incorrect behavior with GONE views used in Flow helper | 144388675 |
| Percentage Constraint not working properly in Constraint Flow Layout | 144667391 |
| Constraint Flow layout rows are getting overlapped | 144668321 |
| Problem with chained widgets | 144987885 |
| deriveConstraintsFrom doesn't seem to derive custom attributes | 145977578 |
| [2.0.0-beta04] layout_constraintVertical_bias is 0.5 like 1 | 146591537 |
| ConstraintLayout 1.1 bug or undocumented change | 77991323 |
| MotionLayout: View shakes after list scroll | 126123628 |
| Changing visibility not redrawing layout | 127623474 |
| NPE on tap when scene not assigned | 137286955 |
| MotionLayout set Transition Listener | 139481711 |
| layout_constraintDimensionRatio stays applied after a move to another ConstraintSet in MotionLayout | 140263105 |
| touchRegionId doesn't work properly for Motion Layout | 142498322 |
| [ConstraintLayout 2.0.0-beta-2] MotionLayout: Calling transitionToState too quickly results in MotionLayout getting into a bad state | 142698005 |
| Nested MotionLayout gets stuck on scroll even with motion:onTouchUp="autoComplete" | 143501796 |
| MotionLayout visibilityMode="ignore" doesn't work with deriveConstraintsFrom | 144795175 |
| Padding start/end/vertical/horizontal not working in Constraint Layout Flow | 146265835 |
| setTransition(id) method request | 146537011 |
| The Layout deforms by itself. | 146794818 |
| CL 2.0 beta 4 chain biases and gone views | 146920079 |
| Flow elevation problem | 148483377 |
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