Ottieni l'altezza di un BottomSheet in modo che riciclabilità possa sempre rimanere al di sopra di esso - android, android-recyclerview, bottom-sheet

  View bottomSheet = findViewById(R.id.design_bottom_sheet);



<?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"
android:id="@+id/rootview"
android:layout_width="match_parent"
android:layout_height="match_parent"

>

<LinearLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">


<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"

app:popupTheme="@style/MyMaterialTheme.PopupOverlay">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal"
android:paddingRight="16dp">

<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_weight="1"
android:singleLine="true"
android:text=""
android:textColor="#fff"
android:textSize="20.4sp"
android:transitionName="profile" />

<ImageButton
android:id="@+id/options"

android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@null"


/>
</LinearLayout>

</android.support.v7.widget.Toolbar>


<android.support.v7.widget.RecyclerView
android:id="@+id/chat_list_view"
android:layout_width="match_parent"
android:layout_height="match_parent"

android:background="#efefef"
android:scrollbars="none"
app:reverseLayout="true"

app:stackFromEnd="true" />


</LinearLayout>

<RelativeLayout
android:id="@+id/design_bottom_sheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="bottom"

app:behavior_hideable="true"
app:behavior_peekHeight="50dp"

app:layout_behavior="@string/bottom_sheet_behavior">

<include layout="@layout/recommendation_keyboard_paginated"></include>

</RelativeLayout>

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

Ho usato il seguente layout relativocome foglio di fondo. Come posso ottenere l'altezza durante un'istanza di runtime. Fondamentalmente, la mia attività consiste in un elenco (recyclerview) e voglio mantenere il recyclerview sopra il foglio inferiore ogni volta che viene visualizzato il foglio. Proprio ora, viene nascosto dietro il foglio.

risposte:

cambia il layout in questo

 <?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"
android:id="@+id/rootview"
android:layout_width="match_parent"
android:layout_height="match_parent"

>

<LinearLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">


<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"

app:popupTheme="@style/MyMaterialTheme.PopupOverlay">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal"
android:paddingRight="16dp">

<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_weight="1"
android:singleLine="true"
android:text=""
android:textColor="#fff"
android:textSize="20.4sp"
android:transitionName="profile" />

<ImageButton
android:id="@+id/options"

android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@null"


/>
</LinearLayout>

</android.support.v7.widget.Toolbar>


<android.support.v7.widget.RecyclerView
android:id="@+id/chat_list_view"
android:layout_width="match_parent"
android:layout_height="match_parent"

android:background="#efefef"
android:scrollbars="none"
app:reverseLayout="true"

app:stackFromEnd="true" />

<RelativeLayout
android:id="@+id/design_bottom_sheet"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="bottom"

app:behavior_hideable="true"
app:behavior_peekHeight="50dp"

app:layout_behavior="@string/bottom_sheet_behavior">

<include layout="@layout/recommendation_keyboard_paginated"></include>

</RelativeLayout>
</LinearLayout>



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