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ListBuilder

@RequiresApi(19) open class ListBuilder : TemplateSliceBuilder
kotlin.Any
   ↳ androidx.slice.builders.TemplateSliceBuilder
   ↳ androidx.slice.builders.ListBuilder

Builder for constructing slices composed of rows of content.

A slice is a piece of templated app content that can be presented outside of the app providing the slice in a androidx.slice.widget.SliceView. To provide a slice you should implement a androidx.slice.SliceProvider and use ListBuilder to construct your slice when androidx.slice.SliceProvider#onBindSlice(Uri) is called.

ListBuilder allows you to construct a slice made up of rows of content. The row types that ListBuilder supports are:

  • HeaderBuilder - The first row of your slice should be a header. The header supports a title, subtitle, and tappable row action. A header can also have a summary of the contents of the slice which can be shown when not all of the slice can be displayed.
  • RowBuilder - A basic row supports title, subtitle, timestamps, and various action types.
  • GridRowBuilder - A grid row supports cells of vertically laid out content displayed in a single row.
  • RangeBuilder - A range row supports displaying a horizontal progress indicator.
  • InputRangeBuilder - An input range row supports displaying a horizontal slider allowing slider input (e.g. brightness or volume slider).
  • RatingBuilder - An star rating row supports displaying a horizontal star rating input (e.g. rating 4/5 stars)

Handling modes

Slices are meant to be presented outside of the app providing them, the slice presenter could be an Android system surface or another application. The presenter will normally use a androidx.slice.widget.SliceView to display a slice. SliceView supports a couple of different modes. These modes are not controlled by the app providing the slice, but rather by the surface that is presenting the slice. To ensure your slice is presented correctly you should consider the different modes SliceView supports:

Specifying actions

In addition to rows of content, ListBuilder can also have SliceActions added to it. These actions may appear differently on your slice depending on how androidx.slice.widget.SliceView is configured. Normally the actions appear as icons in the header of the slice.

How much content to add

There is no limit to the number of rows added to ListBuilder, however, the contents of a slice should be related to a primary task, action, or set of information. For example: it might make sense for a slice to manage wi-fi state to have a row for each available network, this might result in a large number of rows but each of these rows serve utility for the primary purpose of the slice which is managing wi-fi.

Note that scrolling on SliceView can be disabled, in which case only the header and one or two rows of content may be shown for your slice. If your slice contains many rows of content to scroll through (e.g. list of wifi networks), consider using setSeeMoreAction(PendingIntent) to provide a link to open the activity associated with the content.

Summary

Nested classes
open

Builder to construct a header row.

open

Builder to construct a input range row.

open

Builder to construct a range row which can be added to a ListBuilder.

Builder to construct a input star rating.

open

Builder to construct a row.

Constants
static Int

Indicates that an button should be presented with text.

static Int

Indicates that an image should be presented as an icon and it can be tinted.

static Long

Constant representing infinity.

static Int

Indicates that an image presented in a larger size and it shouldn't be tinted.

static Int

Indicates that the progress bar should be presented in determinate mode.

static Int

Indicates that the progress bar should be presented in indeterminate mode.

static Int

Indicates that the progress bar should be presented as a star rating.

static Int

Indicates that an image should be presented in its intrinsic size and shouldn't be tinted.

static Int

Indicates that an image should be presented in its intrinsic size and shouldn't be tinted.

static Int

Indicates that an image should be presented in a smaller size and it shouldn't be tinted.

static Int

Indicates that an image mode is unknown.

Public constructors
<init>(@NonNull context: Context, @NonNull uri: Uri, ttl: Long)

Create a ListBuilder for constructing slice content.

<init>(@NonNull context: Context, @NonNull uri: Uri, @Nullable ttl: Duration?)

Create a ListBuilder for constructing slice content.

Public methods
open ListBuilder
addAction(@NonNull action: SliceAction)

Adds an action to this list builder.

open ListBuilder
addGridRow(@NonNull builder: GridRowBuilder)

Add a grid row to the list builder.

open ListBuilder

Add an input range row to the list builder.

open ListBuilder
addRange(@NonNull rangeBuilder: ListBuilder.RangeBuilder)

Add a range row to the list builder.

open ListBuilder

Add an star rating row to the list builder.