如何在布局的底部视图中绑定一个BottomSheet

mar*_*nta 4 android bottom-sheet android-constraintlayout

通过 ConstraintLayout,我使用 BottomSheet 来显示地图详细信息的内容。我的想法与 GoogleMaps 中使用的相同,但顶部没有图像轮播。

在此处输入图片说明

我需要找到一些属性将BottomSheet绑定在底部,仅使用其布局的大小,而不是整个窗口,如下所示:

在此处输入图片说明

这是父视图中我的 XML:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:mapbox="http://schemas.android.com/apk/res-auto"
    android:id="@+id/coordinator_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.mapbox.mapboxsdk.maps.MapView
        android:id="@+id/mapview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true"
        mapbox:center_latitude="0"
        mapbox:center_longitude="0"
        mapbox:style_url="@string/style_mapbox_streets"
        mapbox:zoom="12" />

    <!--
    <ImageView
        android:id="@+id/bottom_sheet_backdrop"
        android:layout_width="match_parent"
        android:layout_height="@dimen/anchor_point"
        android:fitsSystemWindows="true"
        app:layout_behavior="@string/BackDropBottomSheetBehavior" />
    -->

    <android.support.v4.widget.NestedScrollView
        android:id="@+id/bottom_sheet"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        android:orientation="vertical"
        app:anchorPoint="@dimen/anchor_point"
        app:behavior_hideable="true"
        app:behavior_peekHeight="@dimen/bottom_sheet_peek_height"
        app:layout_behavior="@string/BottomSheetBehaviorGoogleMapsLike">

        <include
            layout="@layout/places_bottom_sheet"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true" />
    </android.support.v4.widget.NestedScrollView>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/places_fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/fab_margin"
        android:clickable="true"
        android:src="@drawable/ic_directions"
        app:elevation="3dp"
        app:layout_anchor="@id/bottom_sheet"
        app:layout_anchorGravity="top|right|end"
        app:layout_behavior="@string/ScrollAwareFABBehavior" />

</android.support.design.widget.CoordinatorLayout>
Run Code Online (Sandbox Code Playgroud)

这是来自BottomSheet“layout/places_bottom_sheet”的设计

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    android:orientation="vertical"
    android:paddingBottom="16dp">

    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="8dp"
        android:orientation="horizontal"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <ImageView
            android:id="@+id/bottom_sheet_place_icon"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="8dp"
            android:src="@drawable/watchmen" />

        <TextView
            android:id="@+id/bottom_sheet_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="16dp"
            android:text="Bottom Sheet Title"
            android:textSize="20sp" />

    </LinearLayout>

    <!-- line separator -->
    <include
        android:id="@+id/include2"
        layout="@layout/line_separator"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginBottom="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="0dp"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/linearLayout2" />

    <!-- street address-->
    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="0dp"
        android:orientation="horizontal"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/include2">

        <ImageView
            android:id="@+id/bottom_sheet_address_icon"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_marginStart="8dp"
            android:scaleType="center"
            android:src="@drawable/ic_location_on_black_24dp" />

        <TextView
            android:id="@+id/bottom_sheet_address_content"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="16dp"
            android:text="Rua tal, Nº 1234"
            android:textSize="14sp" />

    </LinearLayout>

    <!-- phone -->
    <LinearLayout
        android:id="@+id/linearLayout3"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginEnd="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:orientation="horizontal"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/linearLayout">

        <ImageView
            android:id="@+id/bottom_sheet_phone_icon"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_marginStart="8dp"
            android:scaleType="center"
            android:src="@drawable/ic_phone_black_24dp" />

        <TextView
            android:id="@+id/bottom_sheet_phone_content"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center_vertical"
            android:layout_marginStart="16dp"
            android:text="(62) 983 234 544"
            android:textSize="14sp" />

    </LinearLayout>


</android.support.constraint.ConstraintLayout>
Run Code Online (Sandbox Code Playgroud)

Hap*_*Dev 5

BottomSheet 仅适用于 Coordinator Layout 或作为 BottomSheetDialogFragment 弹出窗口。

因为:app:layout_behavior是协调器布局的一部分

目前似乎无法将 BottomSheet 放入 ConstraintsLayout 中,这会很棒。它们都扩展了视图组,所以也许有一天,我们会在 ConstraintsLayout 或两者的某种混合中看到 Coordinator Layout 的功能。