BottomSheet随着能见度的变化而飞走 [英] BottomSheet fly away with visibility change
本文介绍了BottomSheet随着能见度的变化而飞走的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个内部带有NestedScrollView的底部工作表(请参见下文).当我按下FAB按钮时，我想使此NestedScrollView中的某些部分不可见.但是，当我将一些linearlayouts可见性更改为GONE时，底页就会从顶部飞走.看到这里:
您可以从 https://github.com/Tanrikut/BottomSheetExample 中获取整个代码
我的更改可见性方法:
private void changeVisibility() {
subtitleLayout.setVisibility(View.GONE);
coordinateLayout.setVisibility(View.GONE);
timeLayout.setVisibility(View.GONE);
}
我的NestedScrollView xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:behavior_peekHeight="120dp"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
android:id="@+id/bottom_sheet_main">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="28dp"
android:background="@android:color/white"
android:animateLayoutChanges="true"
android:orientation="vertical"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingLeft="10dp"
android:paddingStart="10dp"
android:paddingTop="@dimen/activity_horizontal_margin">
<TextView
style="@style/TextAppearance.AppCompat.Headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Dandelion Chocolate"
android:id="@+id/title" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/activity_horizontal_margin"
android:layout_marginTop="16dp"
android:orientation="horizontal"
android:id="@+id/subtitleLayout">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/subtitle"
android:text="Subtitle" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="@dimen/activity_horizontal_margin"
android:id="@+id/coordinateLayout">
<ImageButton
android:layout_width="24dp"
android:layout_height="24dp"
android:alpha="0.36"
android:src="@drawable/ic_room_24dp"
android:background="@null" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/activity_horizontal_margin"
android:layout_marginStart="@dimen/activity_horizontal_margin"
android:text="740, Valencia St, San Francisco, CA"
android:textColor="@android:color/primary_text_light"
android:id="@+id/bottom_sheet_coordinate" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="@dimen/activity_horizontal_margin"
android:id="@+id/timeLayout">
<ImageButton
android:layout_width="24dp"
android:layout_height="24dp"
android:alpha="0.36"
android:src="@drawable/ic_query_builder_24dp"
android:background="@null" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/activity_horizontal_margin"
android:layout_marginStart="@dimen/activity_horizontal_margin"
android:text="Wed, 10 AM - 9 PM"
android:textColor="@android:color/primary_text_light"
android:id="@+id/bottom_sheet_time" />
</LinearLayout>
</LinearLayout>
</FrameLayout>
</android.support.v4.widget.NestedScrollView>
解决方案
我遇到了这个问题，花了一段时间才找出原因.
这是因为您使用的是android:animateLayoutChanges，它会在BottomSheetBehavior或CoordinatorLayout中显示一个错误.
将其删除，BottomSheet会在不应该的情况下自行停止设置动画.不是解决方法，但至少是解决方法.
-
更新:
事实证明，如果通过设置要使用的LayoutTransition实例以编程方式启用"animateLayoutChanges"，则可以在其上设置一个标志，以防止其与您正在使用android:animateLayoutChanges的视图的祖先混淆(又名:您的BottomSheet容器):
LayoutTransition transition = new LayoutTransition();
transition.setAnimateParentHierarchy(false);
yourLinearLayoutThatNeedsLayoutAnimation.setLayoutTransition(transition);
I have a bottom sheet with a NestedScrollView inside (see below). When I press on a FAB button, I want to make some parts in this NestedScrollView invisible. But when I change some linearlayouts visibilities to GONE, bottomsheet fly aways from the top. See here:
You can get the whole code from https://github.com/Tanrikut/BottomSheetExample
My change visibility method:
private void changeVisibility() {
subtitleLayout.setVisibility(View.GONE);
coordinateLayout.setVisibility(View.GONE);
timeLayout.setVisibility(View.GONE);
}
My NestedScrollView xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:behavior_peekHeight="120dp"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
android:id="@+id/bottom_sheet_main">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="28dp"
android:background="@android:color/white"
android:animateLayoutChanges="true"
android:orientation="vertical"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingLeft="10dp"
android:paddingStart="10dp"
android:paddingTop="@dimen/activity_horizontal_margin">
<TextView
style="@style/TextAppearance.AppCompat.Headline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Dandelion Chocolate"
android:id="@+id/title" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/activity_horizontal_margin"
android:layout_marginTop="16dp"
android:orientation="horizontal"
android:id="@+id/subtitleLayout">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/subtitle"
android:text="Subtitle" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="@dimen/activity_horizontal_margin"
android:id="@+id/coordinateLayout">
<ImageButton
android:layout_width="24dp"
android:layout_height="24dp"
android:alpha="0.36"
android:src="@drawable/ic_room_24dp"
android:background="@null" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/activity_horizontal_margin"
android:layout_marginStart="@dimen/activity_horizontal_margin"
android:text="740, Valencia St, San Francisco, CA"
android:textColor="@android:color/primary_text_light"
android:id="@+id/bottom_sheet_coordinate" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="@dimen/activity_horizontal_margin"
android:id="@+id/timeLayout">
<ImageButton
android:layout_width="24dp"
android:layout_height="24dp"
android:alpha="0.36"
android:src="@drawable/ic_query_builder_24dp"
android:background="@null" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="@dimen/activity_horizontal_margin"
android:layout_marginStart="@dimen/activity_horizontal_margin"
android:text="Wed, 10 AM - 9 PM"
android:textColor="@android:color/primary_text_light"
android:id="@+id/bottom_sheet_time" />
</LinearLayout>
</LinearLayout>
</FrameLayout>
</android.support.v4.widget.NestedScrollView>
解决方案
I ran into this, took a while to figure out what was the cause.
It's because you're using android:animateLayoutChanges, which surfaces a bug in either BottomSheetBehavior or CoordinatorLayout.
Remove it and the BottomSheet will stop animating on its own when it shouldn't. Not a fix, but a workaround at least.
--
Update:
Turns out that if you enable "animateLayoutChanges" programmatically by setting the LayoutTransition instance to use, you can set a flag on it that will prevent it from messing with views that are ancestors of the one you're using android:animateLayoutChanges on (aka: your BottomSheet container):
LayoutTransition transition = new LayoutTransition();
transition.setAnimateParentHierarchy(false);
yourLinearLayoutThatNeedsLayoutAnimation.setLayoutTransition(transition);
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