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Insets for Jetpack Compose

Maven Central

Insets for Jetpack Compose takes a lot of the ideas which drove Insetter for views, and applies them for use in composables.

Usage

To setup Insets in your composables, you need to call the ProvideWindowInsets function and wrap your content. This would typically be done near the top level of your composable hierarchy:

setContent {
  MaterialTheme {
    ProvideWindowInsets {
      // your content
    }
  }
}

Note

This library does not disable window decor fitting. For your view hierarchy to able to receive insets, you need to make sure to call: WindowCompat.setDecorFitsSystemWindows(window, false) from your Activity. You also need to set the system bar backgrounds to be transparent, which can be done with our System UI Controller library.

ProvideWindowInsets allows the library to set an OnApplyWindowInsetsListener on your content's host view. That listener is used to update the value of a composition local bundled in this library: LocalWindowInsets.

LocalWindowInsets holds an instance of WindowInsets which contains the value of various WindowInsets types. You can use the values manually like so:

@Composable
fun ImeAvoidingBox() {
    val insets = LocalWindowInsets.current

    val imeBottom = with(LocalDensity.current) { insets.ime.bottom.toDp() }
    Box(Modifier.padding(bottom = imeBottom))
}

...but we also provide some easy-to-use Modifiers.

Modifiers

We provide two types of modifiers for easy handling of insets: padding and size.

Padding modifiers

The padding modifiers allow you to apply padding to a composable which matches a specific type of inset. Currently we provide:

These are commonly used to move composables out from under the system bars. The common example would be a FloatingActionButton:

FloatingActionButton(
    onClick = { /* TODO */ },
    modifier = Modifier
        .align(Alignment.BottomEnd)
        .padding(16.dp) // normal 16dp of padding for FABs
        .navigationBarsPadding() // Move it out from under the nav bar
) {
    Icon(imageVector = Icons.Default.Add, contentDescription = null)
}

Size modifiers

The size modifiers allow you to match the size of a composable to a specific type of inset. Currently we provide:

These are commonly used to allow composables behind the system bars, to provide background protection, or similar:

Spacer(
    Modifier
        .background(Color.Black.copy(alpha = 0.7f))
        .statusBarsHeight() // Match the height of the status bar
        .fillMaxWidth()
)

PaddingValues

Compose also provides the concept of PaddingValues, a data class which contains the padding values to be applied on all dimensions (similar to a rect). This is commonly used with container composables, such as LazyColumn, to set the content padding.

You may want to use inset values for content padding, so this library provides the rememberInsetsPaddingValues() extension function to convert between Insets and PaddingValues. Here's an example of using the system bars insets:

LazyColumn(
    contentPadding = rememberInsetsPaddingValues(
        insets = LocalWindowInsets.current.systemBars,
        applyTop = true,
        applyBottom = true,
    )
) {
    // content
}

For a more complex example, see the EdgeToEdgeLazyColumn example:

Inset-aware layouts (insets-ui)

Unfortunately, most of Compose Material's layouts do not support the use of content padding, which means that the following code probably doesn't produce the effect you want:

// 😥 This likely doesn't do what you want
TopAppBar(
    // content
    modifier = Modifier.statusBarsPadding()
)

To workaround this, we provide the insets-ui companion library which contains versions of commonly used layouts, with the addition of a contentPadding parameter. The example below is using our TopAppBar layout, providing the status bar insets to use as content padding:

import com.google.accompanist.insets.ui.TopAppBar

TopAppBar(
    contentPadding = rememberInsetsPaddingValues(
        insets = LocalWindowInsets.current.statusBars,
        applyStart = true,
        applyTop = true,
        applyEnd = true,
    )
) {
    // content
}

The library also provides a modified copy of Compose Material's Scaffold which better supports edge-to-edge layouts, by drawing the top and bottom bars over the content.

Scaffold(
    topBar = {
        // We use TopAppBar from accompanist-insets-ui which allows us to provide
        // content padding matching the system bars insets.
        TopAppBar(
            title = { Text(stringResource(R.string.insets_title_list)) },
            backgroundColor = MaterialTheme.colors.surface.copy(alpha = 0.9f),
            contentPadding = rememberInsetsPaddingValues(
                LocalWindowInsets.current.statusBars,
                applyBottom = false,
            ),
        )
    },
    bottomBar = {
        // We add a spacer as a bottom bar, which is the same height as
        // the navigation bar
        Spacer(Modifier.navigationBarsHeight().fillMaxWidth())
    },
) { contentPadding ->
    // We apply the contentPadding passed to us from the Scaffold
    Box(Modifier.padding(contentPadding)) {
        // content
    }
}

See the API docs for a list of the other layouts provided in the library.

Animated Insets support

The library now has experimental support for WindowInsetsAnimations, allowing your content is react to inset animations, such as the on screen-keyboard (IME) being animated on/off screen. The imePadding() and navigationBarsWithImePadding() modifiers are available especially for this use-case.

This functionality works wherever WindowInsetsAnimationCompat works, which at the time or writing is on devices running API 21+.

To enable animated insets support, you need need to new ProvideWindowInsets overload, and set windowInsetsAnimationsEnabled = true.

ProvideWindowInsets(windowInsetsAnimationsEnabled = true) {
    // content
}

You can then use the new navigationBarsWithImePadding() modifier like so:

OutlinedTextField(
    // other params,
    modifier = Modifier.navigationBarsWithImePadding()
)

See the ImeAnimationSample for a working example.

IME animations

If you're using the animation insets support for IME/keyboard animations, you also need to ensure that the activity's windowSoftInputMode is set to adjustResize:

<activity
      android:name=".MyActivity"
      android:windowSoftInputMode="adjustResize">
</activity>

The default value of windowSoftInputMode should work, but Compose does not currently set the flags necessary (see here).

🚧 Experimental

The features below are experimental, and require developers to opt-in.

Controlling the IME (on-screen keyboard)

This library also has support for controlling the IME from scroll gestures, allowing your scrollable components to pull/push the IME on/off screen. This is acheived through the built-in NestedScrollConnection implementation returned by rememberImeNestedScrollConnection().

This functionality only works when running on devices with API 30+.

// Here we're using ScrollableColumn, but it also works with LazyColumn, etc.
ScrollableColumn(
    // We use the nestedScroll modifier, passing in the 
    // the connection from rememberImeNestedScrollConnection()
    modifier = Modifier.nestedScroll(
        connection = rememberImeNestedScrollConnection()
    )
) {
    // list content
}

See the ImeAnimationSample for a working example.

Download

Maven Central

repositories {
    mavenCentral()
}

dependencies {
    implementation "com.google.accompanist:accompanist-insets:<version>"
    // If using insets-ui
    implementation "com.google.accompanist:accompanist-insets-ui:<version>"
}

Snapshots of the development version are available in Sonatype's snapshots repository. These are updated on every commit.

Something not working?

If you find that something isn't working correctly, here's a checklist to try:

  • Check that you've called WindowCompat.setDecorFitsSystemWindows(window, false) in your Activity. Unless you do that, the window decor will consume the insets, and they will not be dispatched to your content.
  • If it's something related to the keyboard, check that the Activity's windowSoftInputMode is set to adjustResize. Without that, IME visibility changes will not be sent as inset changes.
  • Similarly, if you're setting android:windowFullscreen to true (or using a .Fullscreen theme), be aware that adjustResize will not work. Please see the documentation for an alternative.
  • If you're using ProvideWindowInsets (or ViewWindowInsetObserver) in multiple layers of your view hierarchy (i.e. in the activity, and in a fragment), you need to turn off consuming of insets. By default ProvideWindowInsets and ViewWindowInsetObserver will completely consume any insets passed to it. In the previous example, this means that the activity content will get the insets, but the fragment won't. To disable consuming, pass consumeWindowInsets = false to ProvideWindowInsets or ViewWindowInsetObserver.start().