Persistent BottomSheet below ActionBar

Question

I have an app layout with a custom toolbar and a persistent BottomSheet - both inside of a CoordinatorLayout.

On a button click I want to show the BottomSheet. Right now the sheet is displayed fullscreen and overlays the toolbar. By setting the app theme to Theme.AppCompat.Light.DarkActionBar the BottomSheet stays below the ActionBar, but the bar cannot be customized.

Is there a way to limit the height of the persitent BottomSheet to fullscreen - ActionBar height?

This is my code in activity_main.xml

<android.support.design.widget.CoordinatorLayout
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:attrs="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="com.test.MainActivity">

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

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        app:elevation="20dp"
        android:elevation="20dp"
        android:layout_height="?attr/actionBarSize">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            app:elevation="20dp"
            android:elevation="20dp"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"/>
    </android.support.design.widget.AppBarLayout>
    </LinearLayout>
    <include layout="@layout/bottom_sheet_additem"/>
</CoordinatorLayout>

Here is the code of sheet_bottom.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/bottomSheetLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorAccent"
    app:behavior_hideable="true"
    app:behavior_peekHeight="0dp"
    android:fitsSystemWindows="true"
    app:layout_behavior="@string/bottom_sheet_behavior">

    <TextView
        android:id="@+id/bottomsheet_text"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:text="Lorem Ipsum Dolor..."
        android:textColor="#FFFFFF" />
</RelativeLayout>

The image on the left hand side shows the BottomSheet which stops below the Toolbar - which is not working with my current code. Currently it looks like the picture on the right.

Answer 1

I had the same problem... I don't know if it's the best solution, but for now, worked for me.

Try to put your include inside another CoordinatorLayout in your activity_main.xml, with a marginTop like this:

<android.support.design.widget.CoordinatorLayout
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:attrs="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="com.test.MainActivity">

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

        <android.support.design.widget.AppBarLayout
          android:layout_width="match_parent"
          app:elevation="20dp"
          android:elevation="20dp"
          android:layout_height="?attr/actionBarSize">

          <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            app:elevation="20dp"
            android:elevation="20dp"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"/>
        </android.support.design.widget.AppBarLayout>
    </LinearLayout>

    <android.support.design.widget.CoordinatorLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_marginTop="56dp">
      
      <include layout="@layout/bottom_sheet_additem"/>

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

</CoordinatorLayout>

I hope it helps.

Answer 2

The accepted answer works when you expand the bottom sheet to the full screen, but when collapsing it, it adds additional margin that makes a part of the collapsing layout hidden below the screen, so I decided to put the margin programmatically by listening to the collapse/hidden status of the BottomSheet.

First add the BottomSheet within a CoordintorLayout in xml

And add below callback listener.

mBottomSheetBehavior.addBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
    @Override
    public void onStateChanged(@NonNull View bottomSheet, int newState) {

        CoordinatorLayout bottomSheet = findViewById(..); // inflate the bottom sheet
        CoordinatorLayout.LayoutParams  layoutParams = 
             (CoordinatorLayout.LayoutParams) bottomSheet.getLayoutParams();

        if (newState == BottomSheetBehavior.STATE_COLLAPSED) 
            layoutParams.setMargins(0, 0, 0, 0); // remove top margin
         else if (newState == BottomSheetBehavior.STATE_EXPANDED) {
            layoutParams.setMargins(0, 100, 0, 0); // add top margin
        
        bottomSheet.setLayoutParams(layoutParams);
    }

    @Override
    public void onSlide(@NonNull View bottomSheet, float slideOffset) {

    }
});

Answer 3

We can use app:layout_behavior instead of fixed height

<android.support.design.widget.CoordinatorLayout
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  app:layout_behavior="@string/appbar_scrolling_view_behavior">

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

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

Answer 4

Your sheet_bottom should look like this

<?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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/activity_main">

 <RelativeLayout
    android:id="@+id/bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:behavior_hideable="true"
    app:behavior_peekHeight="?android:attr/actionBarSize"
    app:elevation="@dimen/size_5dp"
    app:layout_behavior="@string/bottom_sheet_behavior">
 </RelativeLayout>

 </androidx.coordinatorlayout.widget.CoordinatorLayout>