【Android】【UI】MaterialDesign - Scrolling techniques
一、想要FloatingActionButton在两个layout中间的效果:<?xml version="1.0" encoding="utf-8"?><androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"xml
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一、想要FloatingActionButton在两个layout中间的效果:
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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="match_parent"
tools:context=".ui.maps.MapsFragment">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:id="@+id/viewA"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="0.6"
android:background="@android:color/holo_purple"
android:orientation="horizontal"/>
<LinearLayout
android:id="@+id/viewB"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="0.4"
android:background="@android:color/holo_orange_light"
android:orientation="horizontal"/>
</LinearLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
app:layout_anchor="@id/viewA"
android:src="@android:drawable/ic_input_add"
app:layout_anchorGravity="bottom|right|end"
android:contentDescription="@string/app_name" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
关键代码:
要在CoordinatorLayout里添加FloatingActionButton, 通过app:layout_anchor和app:layout_anchorGravity确认FloatingActionButton的位置
二、
定义ScrollAwareFABBehavior类时,提示Could not inflate Behavior subclass
后改成如下:
class ScrollAwareFABBehavior(context: Context?, attrs: AttributeSet?) : Behavior(context, attrs) {
参考链接:
Material Design(各种 MaterialDesign 样式)
Material Design - Scrolling techniques
Overlap scrolling view with AppBarLayout
Floating Action Button-Android M新控件
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