Side Sheets ​

Side sheets are surfaces containing supplementary content that are anchored to the side of the screen.

See Bottom Sheet documentation for documentation about bottom sheets.

Contents

• Design and API Documentation
• Using side sheets
• Standard side sheet
• Modal side sheet
• Coplanar side sheet
• Anatomy and key properties
• Predictive Back
• Theming

Design and API Documentation ​

• Google Material3 Spec
• API Reference

Using side sheets ​

Before you can use Material side sheets, you need to add a dependency to the Material Components for Android library. For more information, go to the Getting started page.

Note: Side sheets were introduced in 1.8.0. To use side sheets, make sure you're depending on library version 1.8.0 or later.

Standard side sheet basic usage:

<androidx.coordinatorlayout.widget.CoordinatorLayout
  ...>

  <FrameLayout
    ...
    android:id="@+id/standard_side_sheet"
    app:layout_behavior="com.google.android.material.sidesheet.SideSheetBehavior">

    <!-- Side sheet content. -->

  </FrameLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

Setting behavior ​

There are several attributes that can be used to adjust the behavior of standard and modal side sheets.

Behavior attributes can be applied to standard side sheets in xml by setting them on a child View set to app:layout_behavior, or programmatically:

val standardSideSheetBehavior = SideSheetBehavior.from(standardSideSheet)
// Use this to programmatically apply behavior attributes

More information about these attributes and their default values is available in the behavior attributes section.

Setting state ​

Standard side sheets have the following states:

• STATE_EXPANDED: The side sheet is visible at its maximum height and it is neither dragging nor settling (see below).
• STATE_HIDDEN: The side sheet is no longer visible and can only be re-shown programmatically.
• STATE_DRAGGING: The user is actively dragging the side sheet.
• STATE_SETTLING: The side sheet is settling to a specific height after a drag/swipe gesture. This will be the peek height, expanded height, or 0, in case the user action caused the side sheet to hide.

You can set a state on the side sheet:

sideSheetBehavior.state = Sheet.STATE_HIDDEN

Note: STATE_SETTLING and STATE_DRAGGING should not be set programmatically.

Listening to state and slide changes ​

SideSheetCallbacks can be added to a SideSheetBehavior to listen for state and slide changes:

val sideSheetCallback = object : SideSheetBehavior.SideSheetCallback() {

    override fun onStateChanged(sideSheet: View, newState: Int) {
        // Do something for new state.
    }

    override fun onSlide(sideSheet: View, slideOffset: Float) {
        // Do something for slide offset.
    }
}

// To add a callback:
sideSheetBehavior.addCallback(sideSheetCallback)

// To remove a callback:
sideSheetBehavior.removeCallback(sideSheetCallback)

Standard side sheet ​

Standard side sheets co-exist with the screen’s main UI region and allow for simultaneously viewing and interacting with both regions. They are commonly used to keep a feature or secondary content visible on screen when content in the main UI region is frequently scrolled or panned.

SideSheetBehavior is applied to a child of CoordinatorLayout to make that child a standard side sheet, which is a view that comes up from the side of the screen, elevated over the main content. It can be dragged vertically to expose more or less content.

API and source code:

• SideSheetBehavior
• Class definition
• Class source

Standard side sheet example ​

SideSheetBehavior works in tandem with CoordinatorLayout to let you display content in a side sheet, perform enter/exit animations, respond to dragging/swiping gestures, and more.

Apply the SideSheetBehavior to a direct child View of CoordinatorLayout:

<androidx.coordinatorlayout.widget.CoordinatorLayout
  ...>

  <LinearLayout
    android:id="@+id/standard_side_sheet"
    style="@style/Widget.Material3.SideSheet"
    android:layout_width="256dp"
    android:layout_height="match_parent"
    android:orientation="vertical"
    app:layout_behavior="com.google.android.material.sidesheet.SideSheetBehavior">

    <!-- Side sheet contents. -->
    <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/title"
    .../>

    <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/supporting_text"
    .../>

    <Button
    android:id="@+id/sidesheet_button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/action"
    .../>

  </LinearLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

In this example, the side sheet is the LinearLayout.

Modal side sheet ​

Modal side sheets present the sheet while blocking interaction with the rest of the screen. They are an alternative to inline menus and simple dialogs on mobile devices, providing additional room for content, iconography, and actions.

Modal side sheets render a scrim on the non-side sheet content, to indicate that they are modal and block interaction with the rest of the screen. If the content outside of the dialog is tapped, the side sheet is dismissed. Modal side sheets can be dragged horizontally and dismissed by sliding them off of the screen.

API and source code:

• SideSheetDialog
  • Class definition
  • Class source

Modal side sheet example ​

To show a modal side sheet, instantiate a SideSheetDialog with the desired context:

val sideSheetDialog = SideSheetDialog(requireContext());

Then, you can set the content view of the SideSheetDialog:

sideSheetDialog.setContentView(R.layout.side_sheet_content_layout)

You can then show the side sheet with sideSheetDialog.show() and dismiss it with sideSheetDialog.hide(). SideSheetDialog has built in functionality to automatically cancel the dialog after it is swiped off the screen.

Coplanar side sheet ​

Coplanar side sheets are standard side sheets that "squash" a sibling view's content as the side sheet expands. Coplanar side sheets are on the same plane as their sibling, as opposed to standard side sheets, which are displayed above the screen content.

Note: Coplanar side sheets are not recommended for narrow screens.

Coplanar side sheet example ​

To add a coplanar side sheet to your app, follow the steps to add a standard side sheet to your layout, above, and simply set app:coplanarSiblingViewId on the View that has the side sheet layout_behavior set on it. You can point the coplanar sibling view id to any child of the CoordinatorLayout. Make sure to set style="@style/Widget.Material3.SideSheet" on your side sheet view, as well.

Alternatively, you can set the coplanar sibling view programmatically:

coplanarSideSheet.setCoplanarSiblingView(coplanarSiblingView)

To remove coplanar functionality from a side sheet, simply set the coplanar sibling view to null:

coplanarSideSheet.setCoplanarSiblingView(null)

Anatomy and key properties ​

Side sheets have a sheet, content, and, if modal, a scrim.

1. Sheet
2. Content
3. Scrim (in modal side sheets)

Sheet attributes ​

Behavior attributes ​

More info about these attributes and how to use them in the setting behavior section.

Sheet edge ​

You can set the sheet to originate from the left or right side of the screen. You can also automatically switch the sheet edge based on layout direction, by setting the sheet edge to start or end.

Standard and Coplanar Sheets ​

To set a standard or coplanar sheet's edge, set the gravity property of the side sheet View's CoordinatorLayout.LayoutParams, then request a layout pass on the side sheet View.

val layoutParams = sideSheetView.layoutParams
if (layoutParams is CoordinatorLayout.LayoutParams) {
  layoutParams.gravity = sheetGravity
  sideSheetView.requestLayout()
}

You can also set the sheet edge with XML, by setting android:layout_gravity to the desired gravity:

<FrameLayout
  android:id="@+id/side_sheet_container"
  style="@style/Widget.Material3.SideSheet"
  android:layout_width="256dp"
  android:layout_height="match_parent"
  android:layout_gravity="start"
  app:layout_behavior="@string/side_sheet_behavior">
  <include layout="@layout/side_sheet_layout" />
</FrameLayout>

Modal Sheets ​

To set a modal sheet's edge, pass a Gravity constant into SideSheetDialog's dedicated setSheetEdge method. For example, set the sheet edge to start like this:

sideSheetDialog.setSheetEdge(Gravity.START)

Note: Runtime changes to sheet edges are not supported for modal sheets and may not work as expected. If you'd like to change the sheet edge at runtime, you should recreate the sheet, then call setSheetEdge with the new gravity.

Styles ​

Default style theme attribute:?attr/sideSheetModalStyle

Note: There is no default style theme attribute for standard side sheets, because SideSheetBehaviors don't have a designated associated View. Modal side sheets use ?attr/sideSheetModalStyle as the default style, but there is no need to set ?attr/sideSheetModalStyle on your modal side sheet layout because the style is automatically applied to the parent SideSheetDialog.

See the full list of styles, attributes, and themes and theme overlays.

Predictive Back ​

Modal Side Sheets ​

The modal SideSheetDialog component automatically supports Predictive Back. No further integration is required on the app side other than the general Predictive Back prerequisites and migration steps mentioned here.

Visit the Predictive Back design guidelines to see how the component behaves when a user swipes back.

Standard and Coplanar (Non-Modal) Side Sheets ​

To set up Predictive Back for standard or coplanar (non-modal) side sheets using SideSheetBehavior, create an AndroidX back callback that forwards BackEventCompat objects to your SideSheetBehavior:

val sideSheetBackCallback = object : OnBackPressedCallback(/* enabled= */false) {
  override fun handleOnBackStarted(backEvent: BackEventCompat) {
    sideSheetBehavior.startBackProgress(backEvent)
  }

  override fun handleOnBackProgressed(backEvent: BackEventCompat) {
    sideSheetBehavior.updateBackProgress(backEvent)
  }

  override fun handleOnBackPressed() {
    sideSheetBehavior.handleBackInvoked()
  }

  override fun handleOnBackCancelled() {
    sideSheetBehavior.cancelBackProgress()
  }
}

And then add and enable the back callback as follows:

getOnBackPressedDispatcher().addCallback(this, sideSheetBackCallback)

sideSheetBehavior.addCallback(object : SideSheetCallback() {
  override fun onStateChanged(sideSheet: View, newState: Int) {
    when (newState) {
      STATE_EXPANDED, STATE_SETTLING -> sideSheetBackCallback.setEnabled(true)
      STATE_HIDDEN -> sideSheetBackCallback.setEnabled(false)
      else -> {
        // Do nothing, only change callback enabled for above states.
      }
    }
  }

  override fun onSlide(sideSheet: View, slideOffset: Float) {}
})

Theming side sheets ​

Side sheets support Material Theming, which supports customization of color, shape and more.

Side sheet theming example ​

Setting the theme attribute sideSheetDialogTheme to your custom ThemeOverlay will affect all side sheets.

In res/values/themes.xml:

<style name="Theme.App" parent="Theme.Material3.*">
  ...
  <item name="sideSheetDialogTheme">@style/ThemeOverlay.App.SideSheetDialog</item>
</style>

<style name="ThemeOverlay.App.SideSheetDialog" parent="ThemeOverlay.Material3.SideSheetDialog">
    <item name="sideSheetModalStyle">@style/Widget.App.SideSheet.Modal</item>
</style>

In res/values/styles.xml:

<style name="Widget.App.SideSheet.Modal" parent="Widget.Material3.SideSheet.Modal">
    <item name="backgroundTint">@color/shrine_pink_light</item>
    <item name="shapeAppearance">@style/ShapeAppearance.App.LargeComponent</item>
</style>

<style name="ShapeAppearance.App.LargeComponent" parent="ShapeAppearance.Material3.LargeComponent">
    <item name="cornerFamily">cut</item>
    <item name="cornerSize">24dp</item>
</style>

Note: The benefit of using a custom ThemeOverlay is that any changes to your main theme, such as updated colors, will be reflected in the side sheet, as long as they're not overridden in your custom theme overlay. If you use a custom Theme instead, by extending from one of the Theme.Material3.*.SideSheetDialog variants, you will have more control over exactly what attributes are included in each, but it also means you'll have to duplicate any changes that you've made in your main theme into your custom theme.

API and source code:

• SideSheetBehavior
  • Class definition
  • Class source
• SideSheetDialog
  • Class definition
  • Class source