PercentFrameLayout.LayoutParams | Android Developers

Essentials

Modern Android
Quickly bring your app to life with less code, using a modern declarative approach to UI, and the simplicity of Kotlin.
Explore Modern Android
Adopt Compose for teams

Get started
Start by creating your first app. Go deeper with our training courses or explore app development on your own.
Hello world
Training courses
Tutorials
Kotlin for Android
Monetization with Play

Extend by device
Build apps that give your users seamless experiences from phones to tablets, watches, and more.
Tablets and foldables
Wear OS
Android for Cars
Android TV
ChromeOS
Cross-device SDK

Build by category
Learn to build for your use case by following Google's prescriptive and opinionated guidance.
Games
Media apps
Health & Fitness
Enterprise apps

Get the latest
Stay in touch with the latest releases throughout the year, join our preview programs, and give us your feedback.
Platform releases
Android Studio preview
Jetpack & Compose libraries
Wear OS preview
Privacy Sandbox

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)

Develop Google Play

English
Bahasa Indonesia
Deutsch
Español
Español – América Latina
Français
Português – Brasil
Tiếng Việt
Türkçe
Русский
ภาษาไทย
中文 – 简体
中文 – 繁體
日本語
한국어

Develop

Overview Guides UI Guide Reference Samples

Essentials
- More
Design & Plan
- More
Develop
- Overview
- Guides
- UI Guide
- Reference
- Samples
Google Play

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
androidx.appsearch.app
androidx.appsearch.builtintypes
- Overview
- Classes
androidx.appsearch.builtintypes.properties
- Overview
- Classes
  - Keyword
androidx.appsearch.exceptions
- Overview
- Exceptions
  - AppSearchException
androidx.appsearch.localstorage
- Overview
- Classes
androidx.appsearch.observer
- Overview
- Interfaces
  - ObserverCallback
- Classes
androidx.appsearch.platformstorage
- Overview
- Classes
androidx.appsearch.playservicesstorage
- Overview
- Classes
androidx.appsearch.util
- Overview
- Classes
  - DocumentIdUtil
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
androidx.benchmark.junit4
- Overview
- Classes
androidx.benchmark.macro
androidx.benchmark.macro.junit4
- Overview
- Classes
  - BaselineProfileRule
  - MacrobenchmarkRule
androidx.benchmark.perfetto
androidx.benchmark.vmtrace
androidx.biometric
androidx.biometric.auth
androidx.bluetooth
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
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
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
- Objects
  - BasicTooltipDefaults
androidx.compose.foundation.gestures
- Overview
- Interfaces
- Classes
  - AnchoredDraggableState
  - DraggableAnchorsConfig
- 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.foundation.text2
androidx.compose.foundation.text2.input
androidx.compose.material
androidx.compose.material.icons
- Overview
- Objects
androidx.compose.material.icons.automirrored.filled
androidx.compose.material.icons.automirrored.outlined
androidx.compose.material.icons.automirrored.rounded
androidx.compose.material.icons.automirrored.sharp
androidx.compose.material.icons.automirrored.twotone
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