What’s new within the Jetpack Compose April ’25 launch

Posted by Jolanda Verhoef – Developer Relations Engineer

Right now, as a part of the Compose April ‘25 Invoice of Supplies, we’re releasing model 1.8 of Jetpack Compose, Android’s fashionable, native UI toolkit, utilized by many builders. This launch incorporates new options like autofill, varied textual content enhancements, visibility monitoring, and new methods to animate a composable’s dimension and placement. It additionally stabilizes many experimental APIs and fixes plenty of bugs.

To make use of at the moment’s launch, improve your Compose BOM model to 2025.04.01 :

implementation(platform("androidx.compose:compose-bom:2025.04.01"))

Notice: In case you are not utilizing the Invoice of Supplies, ensure that to improve Compose Basis and Compose UI on the similar time. In any other case, autofill won’t work appropriately.

Autofill

Autofill is a service that simplifies information entry. It allows customers to fill out varieties, login screens, and checkout processes with out manually typing in each element. Now, you possibly can combine this performance into your Compose purposes.

Organising Autofill in your Compose textual content fields is simple:

TextField(
  state = rememberTextFieldState(),
  modifier = Modifier.semantics {
    contentType = ContentType.Username 
  }
)

For full particulars on how one can implement autofill in your software, see the Autofill in Compose documentation.

Textual content

When inserting textual content inside a container, now you can use the autoSize parameter in BasicText to let the textual content dimension routinely adapt to the container dimension:

Field {
    BasicText(
        textual content = "Hi there World",
        maxLines = 1,
        autoSize = TextAutoSize.StepBased()
    )
}

You’ll be able to customise sizing by setting a minimal and/or most font dimension and outline a step dimension. Compose Basis 1.8 incorporates this new BasicText overload, with Materials 1.4 to observe quickly with an up to date Textual content overload.

Moreover, Compose 1.8 enhances textual content overflow dealing with with new TextOverflow.StartEllipsis or TextOverflow.MiddleEllipsis choices, which let you show ellipses at the start or center of a textual content line.

val textual content = "This can be a lengthy textual content that may overflow"
Column(Modifier.width(200.dp)) {
  Textual content(textual content, maxLines = 1, overflow = TextOverflow.Ellipsis)
  Textual content(textual content, maxLines = 1, overflow = TextOverflow.StartEllipsis)
  Textual content(textual content, maxLines = 1, overflow = TextOverflow.MiddleEllipsis)
}

And eventually, we’re increasing help for HTML formatting in AnnotatedString, with the addition of bulleted lists:

Textual content(
  AnnotatedString.fromHtml(
    """
    
    

Visibility monitoring

Compose UI 1.8 introduces a brand new modifier: onLayoutRectChanged. This API solves many use circumstances that the present onGloballyPositioned modifier does; nonetheless, it does so with a lot much less overhead. The onLayoutRectChanged modifier can debounce and throttle the callback per what the use case calls for, which helps with efficiency when it’s added onto an merchandise in LazyColumn or LazyRow.

This new API unlocks options that rely upon a composable’s visibility on display. Compose 1.9 will add higher-level abstractions to this low-level API to simplify widespread use circumstances.

Animate composable bounds

Final yr we launched shared factor transitions, which easily animate content material in your apps. The 1.8 Animation module graduates LookaheadScope to secure, consists of quite a few efficiency and stability enhancements, and features a new modifier, animateBounds. When used inside a LookaheadScope, this modifier routinely animates its composable’s dimension and place on display, when these change:

Field(
  Modifier
    .width(if(expanded) 180.dp else 110.dp)
    .offset(x = if (expanded) 0.dp else 100.dp)
    .animateBounds(lookaheadScope = this@LookaheadScope)
    .background(Shade.LightGray, form = RoundedCornerShape(12.dp))
    .peak(50.dp)
) {
  Textual content("Structure Content material", Modifier.align(Alignment.Middle))
}

Elevated API stability

Jetpack Compose has utilized @Experimental annotations to mark APIs which might be liable to vary throughout releases, for options that require greater than a library’s alpha interval to stabilize. We’ve heard your suggestions that plenty of options have been marked as experimental for a while with no adjustments, contributing to a way of instability. We’re actively stabilizing present experimental APIs—within the UI and Basis modules, we have now lowered the experimental APIs from 172 within the 1.7 launch to 70 within the 1.8 launch. We plan to proceed this stabilization pattern throughout modules in future releases.

Deprecation of contextual movement rows and columns

As a part of the work to cut back experimental annotations, we recognized APIs added in latest releases which might be lower than optimum options for his or her use circumstances. This has led to the choice to deprecate the experimental ContextualFlowRow and ContextualFlowColumn APIs, added in Basis 1.7. If you happen to want the deprecated performance, our advice for now could be to repeat over the implementation and adapt it as wanted, whereas we work on a plan for future parts that may cowl these functionalities higher.

The associated APIs FlowRow and FlowColumn are actually secure; nonetheless, the brand new overflow parameter that was added within the final launch is now deprecated.

Enhancements and fixes for core options

In response to developer suggestions, we have now shipped some notably in-demand options and bug fixes in our core libraries:

• Make dialogs go edge to edge: When displayed full display, dialogs now bear in mind the total dimension of the display and can draw behind system bars.

Get began!

We’re grateful for the entire bug experiences and have requests submitted to our concern tracker – they assist us to enhance Compose and construct the APIs you want. Proceed offering your suggestions, and assist us make Compose higher.

Blissful composing!