androidx.core.util | Android Developers

Platform Design & Plan

Kits & more
Get one of our Figma kits for Android, Material Design, or Wear OS, and start designing your app's UI today.
Go to Android & Material kits
Go to Wear OS kits

UI Design
Design a beautiful user interface using Android best practices.
Design for Android
Mobile
Large screens
Wear OS
TV

Architecture
Design robust, testable, and maintainable app logic and services.
Introduction
Libraries
Navigation
Modularization
Testing

Quality
Plan for app quality and align with Play store guidelines.
Overview
Core value
User experience
Technical quality
Privacy & security

Build for Billions
Create the best experience for entry-level devices
Overview
About new markets
Android (Go edition)

Multidevice Google Play Jetpack Kotlin Docs Games

English
Bahasa Indonesia
Español – América Latina
Português – Brasil
中文 – 简体
日本語
한국어

Android Studio

Sign in

Documentation

Overview Guides Reference Samples

Platform
Design & Plan
- More
Multidevice
Google Play
Jetpack
Kotlin
Docs
- Overview
- Guides
- Reference
- Samples
Games
Android Studio

Android API Reference
Overview
AndroidX
Class Index
Package Index
android.support.v4.media
- Overview
- Classes
android.support.v4.media.session
androidx.activity
androidx.activity.compose
androidx.activity.contextaware
- Overview
- Interfaces
  - ContextAware
  - OnContextAvailableListener
- Classes
  - ContextAwareHelper
androidx.activity.result
androidx.activity.result.contract
androidx.ads.identifier
- Overview
- Classes
  - AdvertisingIdClient
  - AdvertisingIdInfo
- Exceptions
  - AdvertisingIdNotAvailableException
androidx.ads.identifier.provider
- Overview
- Interfaces
  - AdvertisingIdProvider
- Classes
  - AdvertisingIdProviderInfo
  - AdvertisingIdProviderManager
androidx.annotation
androidx.annotation.experimental
- Overview
- Enums
  - Experimental.Level
- Annotations
  - Experimental
  - UseExperimental
androidx.appcompat.app
androidx.appcompat.content.res
- Overview
- Classes
  - AppCompatResources
androidx.appcompat.graphics.drawable
- Overview
- Classes
androidx.appcompat.view
- Overview
- Interfaces
  - ActionMode.Callback
  - CollapsibleActionView
- Classes
  - ActionMode
  - ContextThemeWrapper
androidx.appcompat.widget
androidx.appsearch.annotation
- Overview
- Annotations
androidx.appsearch.app
androidx.appsearch.builtintypes
- Overview
- Classes
androidx.appsearch.exceptions
- Overview
- Exceptions
  - AppSearchException
androidx.appsearch.localstorage
- Overview
- Classes
androidx.appsearch.observer
- Overview
- Interfaces
  - ObserverCallback
- Classes
androidx.appsearch.platformstorage
- Overview
- Classes
androidx.arch.core.executor.testing
- Overview
- Classes
  - CountingTaskExecutorRule
  - InstantTaskExecutorRule
androidx.arch.core.util
- Overview
- Interfaces
  - Function
androidx.asynclayoutinflater.appcompat
- Overview
- Classes
  - AsyncAppCompatFactory
androidx.asynclayoutinflater.view
- Overview
- Interfaces
  - AsyncLayoutFactory
  - AsyncLayoutInflater.OnInflateFinishedListener
- Classes
  - AsyncLayoutInflater
androidx.autofill
- Overview
- Classes
  - HintConstants
androidx.autofill.inline
- Overview
- Interfaces
  - UiVersions.Content
  - UiVersions.Style
- Classes
androidx.autofill.inline.common
- Overview
- Classes
androidx.autofill.inline.v1
- Overview
- Classes
androidx.benchmark
- Overview
- Classes
  - BenchmarkState
- Annotations
  - BenchmarkState.Companion.ExperimentalExternalReport
  - ExperimentalBenchmarkStateApi
- Objects
  - BenchmarkState.Companion
androidx.benchmark.junit4
- Overview
- Classes
androidx.benchmark.macro
androidx.benchmark.macro.junit4
- Overview
- Classes
  - BaselineProfileRule
  - MacrobenchmarkRule
androidx.benchmark.perfetto
- Overview
- Classes
- Annotations
  - ExperimentalPerfettoCaptureApi
  - ExperimentalPerfettoTraceProcessorApi
androidx.biometric
androidx.biometric.auth
androidx.browser.browseractions
- Overview
- Classes
androidx.browser.customtabs
androidx.browser.trusted
androidx.browser.trusted.sharing
- Overview
- Classes
androidx.browser.trusted.splashscreens
- Overview
- Classes
  - SplashScreenParamKey
  - SplashScreenVersion
androidx.camera.camera2
- Overview
- Classes
  - Camera2Config
androidx.camera.camera2.interop
- Overview
- Classes
- Annotations
  - ExperimentalCamera2Interop
androidx.camera.core
androidx.camera.core.resolutionselector
- Overview
- Interfaces
  - ResolutionFilter
- Classes
androidx.camera.extensions
- Overview
- Classes
  - ExtensionMode
  - ExtensionsManager
androidx.camera.lifecycle
- Overview
- Classes
  - ProcessCameraProvider
- Annotations
  - ExperimentalCameraProviderConfiguration
androidx.camera.mlkit.vision
- Overview
- Classes
  - MlKitAnalyzer
  - MlKitAnalyzer.Result
androidx.camera.previewview
- Overview
- Interfaces
  - PreviewSurfaceRequest.Callback
- Classes
  - CameraViewFinder
  - PreviewSurfaceRequest
- Enums
  - CameraViewFinder.ImplementationMode
  - CameraViewFinder.ScaleType
androidx.camera.video
androidx.camera.view
- Overview
- Interfaces
  - RotationProvider.Listener
- Classes
- Enums
androidx.camera.view.transform
- Overview
- Classes
androidx.camera.view.video
- Overview
- Classes
  - AudioConfig
- Annotations
  - ExperimentalVideo
androidx.camera.viewfinder
- Overview
- Classes
- Enums
  - CameraViewfinder.ImplementationMode
  - CameraViewfinder.ScaleType
- Objects
  - CameraViewfinderExt
androidx.car.app
- Overview
- Interfaces
- Classes
- Exceptions
  - HostException
androidx.car.app.activity
- Overview
- Classes
  - BaseCarAppActivity
  - CarAppActivity
androidx.car.app.activity.renderer.surface
- Overview
- Interfaces
  - SurfaceControlCallback
- Classes
  - LegacySurfacePackage
  - SurfaceWrapper
androidx.car.app.annotations
- Overview
- Annotations
androidx.car.app.connection
- Overview
- Classes
  - CarConnection
androidx.car.app.constraints
- Overview
- Classes
  - ConstraintManager
androidx.car.app.hardware
- Overview
- Interfaces
  - CarHardwareManager
- Classes
  - AutomotiveCarHardwareManager
androidx.car.app.hardware.climate
androidx.car.app.hardware.common
androidx.car.app.hardware.info
androidx.car.app.managers
- Overview
- Interfaces
  - Manager
androidx.car.app.media
androidx.car.app.mediaextensions
- Overview
- Classes
  - MetadataExtras
androidx.car.app.messaging
- Overview
- Classes
  - MessagingServiceConstants
androidx.car.app.messaging.model
- Overview
- Interfaces
  - ConversationCallback
  - ConversationCallbackDelegate
- Classes
androidx.car.app.model
androidx.car.app.model.signin
androidx.car.app.navigation
- Overview
- Interfaces
  - NavigationManagerCallback
- Classes
  - NavigationManager
androidx.car.app.navigation.model
androidx.car.app.notification
- Overview
- Classes
androidx.car.app.serialization
- Overview
- Classes
  - Bundleable
- Exceptions
  - BundlerException
androidx.car.app.suggestion
- Overview
- Classes
  - SuggestionManager
androidx.car.app.suggestion.model
- Overview
- Classes
  - Suggestion
  - Suggestion.Builder
androidx.car.app.testing
- Overview
- Classes
androidx.car.app.testing.navigation
- Overview
- Classes
  - TestNavigationManager
androidx.car.app.validation
- Overview
- Classes
  - HostValidator
  - HostValidator.Builder
androidx.car.app.versioning
- Overview
- Classes
  - CarAppApiLevels
androidx.cardview.widget
- Overview
- Classes
  - CardView
androidx.collection
- Overview
- Classes
androidx.compose.animation
- Overview
- Interfaces
- Classes
- Enums
  - EnterExitState
- Annotations
  - ExperimentalAnimationApi
androidx.compose.animation.core
androidx.compose.animation.graphics
- Overview
- Annotations
  - ExperimentalAnimationGraphicsApi
androidx.compose.animation.graphics.res
androidx.compose.animation.graphics.vector
- Overview
- Classes
  - AnimatedImageVector
- Objects
  - AnimatedImageVector.Companion
androidx.compose.foundation
- Overview
- Interfaces
- Classes
- Enums
  - MutatePriority
- Annotations
  - ExperimentalFoundationApi
  - InternalFoundationApi
androidx.compose.foundation.gestures
- Overview
- Interfaces
- Enums
  - Orientation
- Exceptions
  - GestureCancellationException
- Objects
  - ScrollableDefaults
androidx.compose.foundation.gestures.snapping
- Overview
- Interfaces
  - SnapLayoutInfoProvider
  - SnapPositionInLayout
- Classes
  - SnapFlingBehavior
androidx.compose.foundation.interaction
androidx.compose.foundation.layout
- Overview
- Interfaces
- Classes
- Enums
  - IntrinsicSize
- Annotations
  - ExperimentalLayoutApi
  - LayoutScopeMarker
- Objects
androidx.compose.foundation.lazy
- Overview
- Interfaces
- Classes
  - LazyListState
- Annotations
  - LazyScopeMarker
androidx.compose.foundation.lazy.grid
- Overview
- Interfaces
- Classes
- Annotations
  - LazyGridScopeMarker
androidx.compose.foundation.lazy.layout
androidx.compose.foundation.lazy.staggeredgrid
androidx.compose.foundation.pager
- Overview
- Interfaces
- Classes
  - PageSize.Fixed
  - PagerState
- Objects
  - PageSize.Fill
  - PagerDefaults
androidx.compose.foundation.relocation
- Overview
- Interfaces
  - BringIntoViewRequester
  - BringIntoViewResponder
androidx.compose.foundation.selection
androidx.compose.foundation.shape
- Overview
- Interfaces
  - CornerSize
- Classes
androidx.compose.foundation.text
- Overview
- Interfaces
  - KeyboardActionScope
- Classes
- Annotations
  - InternalFoundationTextApi
androidx.compose.foundation.text.selection
- Overview
- Classes
  - TextSelectionColors
androidx.compose.material
androidx.compose.material.icons
- Overview
- Objects
androidx.compose.material.icons.filled
androidx.compose.material.icons.outlined
androidx.compose.material.icons.rounded
androidx.compose.material.icons.sharp
androidx.compose.material.icons.twotone
androidx.compose.material.pullrefresh
- Overview
- Classes
  - PullRefreshState
- Objects
  - PullRefreshDefaults
androidx.compose.material.ripple
- Overview
- Interfaces
  - RippleTheme
- Classes
  - RippleAlpha
androidx.compose.material3
androidx.compose.material3.windowsizeclass
- Overview
- Classes
- Annotations
  - ExperimentalMaterial3WindowSizeClassApi
  - TestOnly
androidx.compose.runtime
androidx.compose.runtime.collection
- Overview
- Classes
  - MutableVector
androidx.compose.runtime.internal
- Overview
- Interfaces
  - ComposableLambda
  - ComposableLambdaN
- Annotations
androidx.compose.runtime.livedata
androidx.compose.runtime.reflect
- Overview
- Classes
  - ComposableMethod
androidx.compose.runtime.rxjava2
androidx.compose.runtime.rxjava3
androidx.compose.runtime.saveable
- Overview
- Interfaces
androidx.compose.runtime.snapshots
- Overview
- Interfaces
- Classes
- Exceptions
  - SnapshotApplyConflictException
- Annotations
  - AutoboxingStateValueProperty
  - StateFactoryMarker
- Objects
  - SnapshotApplyResult.Success
  - SnapshotContextElement.Key
androidx.compose.runtime.tooling
- Overview
- Interfaces
  - CompositionData
  - CompositionGroup
androidx.compose.runtime.tracing
- Overview
- Classes
  - TracingInitializer
androidx.compose.ui
androidx.compose.ui.autofill
- Overview
- Interfaces
  - Autofill
- Classes
  - AutofillNode
  - AutofillTree
- Enums
  - AutofillType
androidx.compose.ui.draw
- Overview
- Interfaces
- Classes
androidx.compose.ui.focus
androidx.compose.ui.geometry
- Overview
- Classes
- Objects
androidx.compose.ui.graphics
- Overview
- Interfaces
- Classes