如何在android支持设计底页中设置最大展开高度？ [英] How to set maximum expanded height in android support design bottom sheet?

问题描述

我已经显示了我的底部工作表布局，其窥视高度设置为100dp。但是，如何限制我的底页扩展到仅500dp？这是我的示例布局：

I already showed my bottom sheet layout with its peek height set to 100dp. But how can I limit my bottom sheet to expand to 500dp only? This is my sample layout:

<android.support.design.widget.CoordinatorLayout
android:id="@+id/coordinator"
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">

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MapsActivity" />

<android.support.v4.widget.NestedScrollView
    android:id="@+id/design_bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000000"
    app:behavior_hideable="true"
    app:behavior_peekHeight="100dp"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_marginBottom="5dp"
            android:background="#e444ff" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_marginBottom="5dp"
            android:background="#e444ff" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_marginBottom="5dp"
            android:background="#e444ff" />

    </LinearLayout>

</android.support.v4.widget.NestedScrollView>

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_margin="@dimen/activity_horizontal_margin"
    app:layout_anchor="@+id/design_bottom_sheet"
    app:layout_anchorGravity="top|right|end"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

</android.support.design.widget.CoordinatorLayout>

除了我的问题外，如何禁止用户上下拖动底页？

In addition to my question, how can I disallow the user from dragging the bottom sheet up and down?

推荐答案

阻止底页向上移动到整个屏幕很简单，只需设置 layout_height ，将您的NestedScrollView设置为500dp，也可能要将它设置为 layout_gravity = bottom

to stop the bottom sheet from moving up the full screen is simple, just set a layout_height for your NestedScrollView to 500dp, also you probably want to set it's layout_gravity="bottom"

<android.support.v4.widget.NestedScrollView
    android:id="@+id/design_bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="500dp"
    android:background="#000000"
    android:layout_gravity="bottom"
    app:behavior_hideable="true"
    app:behavior_peekHeight="100dp"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_marginBottom="5dp"
            android:background="#e444ff" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_marginBottom="5dp"
            android:background="#e444ff" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_marginBottom="5dp"
            android:background="#e444ff" />

    </LinearLayout>

</android.support.v4.widget.NestedScrollView>

如果您不希望视图向上拖动，则需要设置 behavior_peekHeight 和 layout_height 设置为相同的值。

if you don't want the view to be draggable up then you need to set behavior_peekHeight and layout_height to the same values.

并停止视图 behavior_hideable 标志不会被拖动下来，只需将其设置为false

And to stop the view from being draggable down is the behavior_hideable flag just set this to false

祝您好运和快乐编码！

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