lifecycle

Responding to component state changes: ViewModel and LiveData APIs, Compose integrations, saved-state handling, process-wide state tracking, ReactiveStreams support, and testing utilities.

#viewmodel
#test
#reactive
#mvvm
#jetpack
#compose
#android-architecture

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Android

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iOS

macOS

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Linux

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Wasm

GitHub stars6112

Authorsandroidx

Dependents48

LicenseApache License 2.0

Creation dateover 6 years ago

Last activity27 days ago

Latest release2.12.0-alpha04 (27 days ago)

Homepage GitHub repository

Lifecycle

Lifecycle-aware components perform actions in response to a change in the lifecycle status of another component, such as activities and fragments. These components help you produce better-organized, and often lighter-weight code, that is easier to maintain.

[User Guide]

[Code Sample]

[API Reference]

Declaring dependencies

To add a dependency on Lifecycle, you must add the Google Maven repository to your project. Read Google's Maven repository for more information.

Add the dependencies for the artifacts you need in the build.gradle file for your app or module:

Kotlin

dependencies {
        val lifecycle_version = "2.10.0"
        val arch_version = "2.2.0"

        // ViewModel
        implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version")
        // ViewModel utilities for Compose
        implementation("androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version")
        // LiveData
        implementation("androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version")
        // Lifecycles only (without ViewModel or LiveData)
        implementation("androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version")
        // Lifecycle utilities for Compose
        implementation("androidx.lifecycle:lifecycle-runtime-compose:$lifecycle_version")

        // Saved state module for ViewModel
        implementation("androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version")

        // ViewModel integration with Navigation3
        implementation("androidx.lifecycle:lifecycle-viewmodel-navigation3:2.10.0")

        // Annotation processor
        kapt("androidx.lifecycle:lifecycle-compiler:$lifecycle_version")
        // alternately - if using Java8, use the following instead of lifecycle-compiler
        implementation("androidx.lifecycle:lifecycle-common-java8:$lifecycle_version")

        // optional - helpers for implementing LifecycleOwner in a Service
        implementation("androidx.lifecycle:lifecycle-service:$lifecycle_version")

        // optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
        implementation("androidx.lifecycle:lifecycle-process:$lifecycle_version")

        // optional - ReactiveStreams support for LiveData
        implementation("androidx.lifecycle:lifecycle-reactivestreams-ktx:$lifecycle_version")

        // optional - Test helpers for LiveData
        testImplementation("androidx.arch.core:core-testing:$arch_version")

        // optional - Test helpers for Lifecycle runtime
        testImplementation("androidx.lifecycle:lifecycle-runtime-testing:$lifecycle_version")
    }

Groovy

dependencies {
        def lifecycle_version = "2.10.0"
        def arch_version = "2.2.0"

        // ViewModel
        implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
        // ViewModel utilities for Compose
        implementation "androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version"
        // LiveData
        implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
        // Lifecycles only (without ViewModel or LiveData)
        implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
        // Lifecycle utilities for Compose
        implementation "androidx.lifecycle:lifecycle-runtime-compose:$lifecycle_version"

        // Saved state module for ViewModel
        implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version"

        // ViewModel integration with Navigation3
        implementation "androidx.lifecycle:lifecycle-viewmodel-navigation3:2.10.0"

        // Annotation processor
        kapt "androidx.lifecycle:lifecycle-compiler:$lifecycle_version"
        // alternately - if using Java8, use the following instead of lifecycle-compiler
        implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"

        // optional - helpers for implementing LifecycleOwner in a Service
        implementation "androidx.lifecycle:lifecycle-service:$lifecycle_version"

        // optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
        implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"

        // optional - ReactiveStreams support for LiveData
        implementation "androidx.lifecycle:lifecycle-reactivestreams-ktx:$lifecycle_version"

        // optional - Test helpers for LiveData
        testImplementation "androidx.arch.core:core-testing:$arch_version"

        // optional - Test helpers for Lifecycle runtime
        testImplementation "androidx.lifecycle:lifecycle-runtime-testing:$lifecycle_version"
    }

Java

Kotlin

dependencies {
        val lifecycle_version = "2.10.0"
        val arch_version = "2.2.0"

        // ViewModel
        implementation("androidx.lifecycle:lifecycle-viewmodel:$lifecycle_version")
        // LiveData
        implementation("androidx.lifecycle:lifecycle-livedata:$lifecycle_version")
        // Lifecycles only (without ViewModel or LiveData)
        implementation("androidx.lifecycle:lifecycle-runtime:$lifecycle_version")

        // Saved state module for ViewModel
        implementation("androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version")

        // Annotation processor
        annotationProcessor("androidx.lifecycle:lifecycle-compiler:$lifecycle_version")
        // alternately - if using Java8, use the following instead of lifecycle-compiler
        implementation("androidx.lifecycle:lifecycle-common-java8:$lifecycle_version")

        // optional - helpers for implementing LifecycleOwner in a Service
        implementation("androidx.lifecycle:lifecycle-service:$lifecycle_version")

        // optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
        implementation("androidx.lifecycle:lifecycle-process:$lifecycle_version")

        // optional - ReactiveStreams support for LiveData
        implementation("androidx.lifecycle:lifecycle-reactivestreams:$lifecycle_version")

        // optional - Test helpers for LiveData
        testImplementation("androidx.arch.core:core-testing:$arch_version")

        // optional - Test helpers for Lifecycle runtime
        testImplementation("androidx.lifecycle:lifecycle-runtime-testing:$lifecycle_version")
    }

Groovy

dependencies {
        def lifecycle_version = "2.10.0"
        def arch_version = "2.2.0"

        // ViewModel
        implementation "androidx.lifecycle:lifecycle-viewmodel:$lifecycle_version"
        // LiveData
        implementation "androidx.lifecycle:lifecycle-livedata:$lifecycle_version"
        // Lifecycles only (without ViewModel or LiveData)
        implementation "androidx.lifecycle:lifecycle-runtime:$lifecycle_version"

        // Saved state module for ViewModel
        implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version"

        // Annotation processor
        annotationProcessor "androidx.lifecycle:lifecycle-compiler:$lifecycle_version"
        // alternately - if using Java8, use the following instead of lifecycle-compiler
        implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"

        // optional - helpers for implementing LifecycleOwner in a Service
        implementation "androidx.lifecycle:lifecycle-service:$lifecycle_version"

        // optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
        implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"

        // optional - ReactiveStreams support for LiveData
        implementation "androidx.lifecycle:lifecycle-reactivestreams:$lifecycle_version"

        // optional - Test helpers for LiveData
        testImplementation "androidx.arch.core:core-testing:$arch_version"

        // optional - Test helpers for Lifecycle runtime
        testImplementation "androidx.lifecycle:lifecycle-runtime-testing:$lifecycle_version"
    }

Issue tracker

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Android

JVM

iOS

macOS

watchOS

tvOS

Linux

Windows

Wasm

GitHub stars6112

Authorsandroidx

Dependents48

LicenseApache License 2.0

Creation dateover 6 years ago

Last activity27 days ago

Latest release2.12.0-alpha04 (27 days ago)

Homepage GitHub repository

Lifecycle

[User Guide]

[Code Sample]

[API Reference]

Declaring dependencies

To add a dependency on Lifecycle, you must add the Google Maven repository to your project. Read Google's Maven repository for more information.

Add the dependencies for the artifacts you need in the build.gradle file for your app or module:

Kotlin

dependencies {
        val lifecycle_version = "2.10.0"
        val arch_version = "2.2.0"

        // ViewModel
        implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version")
        // ViewModel utilities for Compose
        implementation("androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version")
        // LiveData
        implementation("androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version")
        // Lifecycles only (without ViewModel or LiveData)
        implementation("androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version")
        // Lifecycle utilities for Compose
        implementation("androidx.lifecycle:lifecycle-runtime-compose:$lifecycle_version")

        // Saved state module for ViewModel
        implementation("androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version")

        // ViewModel integration with Navigation3
        implementation("androidx.lifecycle:lifecycle-viewmodel-navigation3:2.10.0")

        // Annotation processor
        kapt("androidx.lifecycle:lifecycle-compiler:$lifecycle_version")
        // alternately - if using Java8, use the following instead of lifecycle-compiler
        implementation("androidx.lifecycle:lifecycle-common-java8:$lifecycle_version")

        // optional - helpers for implementing LifecycleOwner in a Service
        implementation("androidx.lifecycle:lifecycle-service:$lifecycle_version")

        // optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
        implementation("androidx.lifecycle:lifecycle-process:$lifecycle_version")

        // optional - ReactiveStreams support for LiveData
        implementation("androidx.lifecycle:lifecycle-reactivestreams-ktx:$lifecycle_version")

        // optional - Test helpers for LiveData
        testImplementation("androidx.arch.core:core-testing:$arch_version")

        // optional - Test helpers for Lifecycle runtime
        testImplementation("androidx.lifecycle:lifecycle-runtime-testing:$lifecycle_version")
    }

Groovy

dependencies {
        def lifecycle_version = "2.10.0"
        def arch_version = "2.2.0"

        // ViewModel
        implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
        // ViewModel utilities for Compose
        implementation "androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycle_version"
        // LiveData
        implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
        // Lifecycles only (without ViewModel or LiveData)
        implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
        // Lifecycle utilities for Compose
        implementation "androidx.lifecycle:lifecycle-runtime-compose:$lifecycle_version"

        // Saved state module for ViewModel
        implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version"

        // ViewModel integration with Navigation3
        implementation "androidx.lifecycle:lifecycle-viewmodel-navigation3:2.10.0"

        // Annotation processor
        kapt "androidx.lifecycle:lifecycle-compiler:$lifecycle_version"
        // alternately - if using Java8, use the following instead of lifecycle-compiler
        implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"

        // optional - helpers for implementing LifecycleOwner in a Service
        implementation "androidx.lifecycle:lifecycle-service:$lifecycle_version"

        // optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
        implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"

        // optional - ReactiveStreams support for LiveData
        implementation "androidx.lifecycle:lifecycle-reactivestreams-ktx:$lifecycle_version"

        // optional - Test helpers for LiveData
        testImplementation "androidx.arch.core:core-testing:$arch_version"

        // optional - Test helpers for Lifecycle runtime
        testImplementation "androidx.lifecycle:lifecycle-runtime-testing:$lifecycle_version"
    }

Java

Kotlin

dependencies {
        val lifecycle_version = "2.10.0"
        val arch_version = "2.2.0"

        // ViewModel
        implementation("androidx.lifecycle:lifecycle-viewmodel:$lifecycle_version")
        // LiveData
        implementation("androidx.lifecycle:lifecycle-livedata:$lifecycle_version")
        // Lifecycles only (without ViewModel or LiveData)
        implementation("androidx.lifecycle:lifecycle-runtime:$lifecycle_version")

        // Saved state module for ViewModel
        implementation("androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version")

        // Annotation processor
        annotationProcessor("androidx.lifecycle:lifecycle-compiler:$lifecycle_version")
        // alternately - if using Java8, use the following instead of lifecycle-compiler
        implementation("androidx.lifecycle:lifecycle-common-java8:$lifecycle_version")

        // optional - helpers for implementing LifecycleOwner in a Service
        implementation("androidx.lifecycle:lifecycle-service:$lifecycle_version")

        // optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
        implementation("androidx.lifecycle:lifecycle-process:$lifecycle_version")

        // optional - ReactiveStreams support for LiveData
        implementation("androidx.lifecycle:lifecycle-reactivestreams:$lifecycle_version")

        // optional - Test helpers for LiveData
        testImplementation("androidx.arch.core:core-testing:$arch_version")

        // optional - Test helpers for Lifecycle runtime
        testImplementation("androidx.lifecycle:lifecycle-runtime-testing:$lifecycle_version")
    }

Groovy

dependencies {
        def lifecycle_version = "2.10.0"
        def arch_version = "2.2.0"

        // ViewModel
        implementation "androidx.lifecycle:lifecycle-viewmodel:$lifecycle_version"
        // LiveData
        implementation "androidx.lifecycle:lifecycle-livedata:$lifecycle_version"
        // Lifecycles only (without ViewModel or LiveData)
        implementation "androidx.lifecycle:lifecycle-runtime:$lifecycle_version"

        // Saved state module for ViewModel
        implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:$lifecycle_version"

        // Annotation processor
        annotationProcessor "androidx.lifecycle:lifecycle-compiler:$lifecycle_version"
        // alternately - if using Java8, use the following instead of lifecycle-compiler
        implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"

        // optional - helpers for implementing LifecycleOwner in a Service
        implementation "androidx.lifecycle:lifecycle-service:$lifecycle_version"

        // optional - ProcessLifecycleOwner provides a lifecycle for the whole application process
        implementation "androidx.lifecycle:lifecycle-process:$lifecycle_version"

        // optional - ReactiveStreams support for LiveData
        implementation "androidx.lifecycle:lifecycle-reactivestreams:$lifecycle_version"

        // optional - Test helpers for LiveData
        testImplementation "androidx.arch.core:core-testing:$arch_version"

        // optional - Test helpers for Lifecycle runtime
        testImplementation "androidx.lifecycle:lifecycle-runtime-testing:$lifecycle_version"
    }

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