如何禁用CoordinatorLayout中的AppBarLayout滚动? [英] How to disable scrolling of AppBarLayout in CoordinatorLayout?
问题描述
我在AppBarLayout
内部有具有视差效果的MapFragment
:
I have MapFragment
with parallax effect inside AppBarLayout
:
我想禁用在AppBarLayout
上的滚动,因为无法在地图上移动,因为地图上的触摸均匀始终被视为滚动事件.
我只想通过滚动屏幕底部的RecyclerView
来处理AppBarLayout
的折叠.
I want to disable scrolling on AppBarLayout
, because it is not possible to move across map, since touch evenys on the map are always handled as scroll events.
I would like to handle collapsing of AppBarLayout
by scrolling RecyclerView
only, which is on the bottom of the screen.
这是我的xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsing_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
app:contentScrim="@color/white"
app:expandedTitleMarginEnd="64dp"
app:expandedTitleMarginStart="48dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
app:titleEnabled="false">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_collapseMode="parallax"
android:fitsSystemWindows="true">
<fragment
android:id="@+id/map"
android:name="com.androidmapsextensions.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</FrameLayout>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="73dp"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:layout_collapseMode="pin"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
<include
android:id="@+id/search_bar"
layout="@layout/layout_searchbar" />
</android.support.v7.widget.Toolbar>
<View
android:id="@+id/toolbar_shadow"
android:layout_width="match_parent"
android:layout_height="3dp"
android:layout_below="@id/search_bar"
android:layout_gravity="bottom"
android:background="@drawable/toolbar_dropshadow"
android:visibility="gone" />
</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>
<RecyclerView
android:id="@+id/farm_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/transparent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
感谢您的回复.
推荐答案
我不确定是否知道,但是我认为您正在寻找DragCallback
.
I'm not sure I got it, but I think you are looking for a DragCallback
.
DragCallback
界面允许选择是否应通过滚动到AppBarLayout
来控制同级滚动视图.
The DragCallback
interface allows to choose whether the sibling scrolling view should be controlled by scrolls onto the AppBarLayout
.
您可以通过以下方式定义一个:
You can define one by calling:
CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) appBarLayout.getLayoutParams();
AppBarLayout.Behavior behavior = (AppBarLayout.Behavior) params.getBehavior();
behavior.setDragCallback(new AppBarLayout.Behavior.DragCallback() {
@Override
public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
return false;
}
});
通过始终返回false
,您的滚动视图将不再受ABL的控制.
By always returning false
, your scrolling view will not be controlled by the ABL any longer.
注意:在调用此功能之前,您应该检查ViewCompat.isLaidOut(appBarLayout)
,否则params.getBehavior()
将返回null.
Note: before calling this you should check that ViewCompat.isLaidOut(appBarLayout)
, otherwise params.getBehavior()
will return null.
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