Unclutter your Jetpack - An opinionated look at Googles library collection

Remember when Google hit the Reset button to clean up the mess of its Android support libraries? Since then, a ton of new Jetpack libraries have been created. Some are obvious choices, like compose. Others you may not have heard of at all, for example palette and window. Depending on how we count, there are way more than 100 artefacts waiting to be added to our apps. If you are feeling lost you are not alone. In this talk, we'll look at what's there, what's useful, and what's obsolete. And you'll learn about a few true gems.

Transcript

1. Unclutter your Jetpack An opinionated look at Googles library collection Thomas Künneth
2. • Over 100 libraries, tools, and guidance for Android app development • Designed to ◦ streamline development ◦ reduce boilerplate code ◦ ensure consistency across devices and Android versions • Goal: help developers write clean, maintainable, and efficient code
3. 100 libraries? Just using Compose. Am I missing something?
4. • What’s there • What’s hot • What’s not • Some not so widely known gems
5. https://www.thomaskuenneth.de
6. • In the early days Android improved and expanded at the speed of light • Roll out to existing devices was slow at best • Adoption of new features was slow, too • The dreadful API-level branches soon appeared
7. • Combat fragmentation with support and backporting libraries • In the course of time, they became a mess ◦ Inconsistent versioning ◦ Different versions, depending on the API level ◦ Lack of, or incomplete, backports
8. • Jetpack was introduced in 2018 (API level 28) • Reboot – trying to fix the mess • More than just libraries ◦ Improved documentation ◦ New and updated guidelines ◦ Samples
9. • Many Jetpack libraries are written in Java • Some offer Kotlin extensions (-ktx) • Others don’t
10. • Fragmentation still an issue today, but in a different way • Less about missing features, more about behavior changes • Jetpack does a decent job in shielding these
11. Role of Jetpack has changed It provides an additional API landscape that is often preferred over platform APIs (MAD skills)
13. Not deprecated (yet), but … • Good old Views and related concepts (layout files, view binding, …) Jetpack Compose • JobScheduler, Services, Alarms Jetpack Work Manager whenever possible • Quite a few framework packages and classes, for example android.media.MediaController2 deprecated
16. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle
17. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle Media
18. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle Media Navigation
19. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle Media Navigation Security
20. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle Media Navigation Security Performance / Test
21. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle Media Navigation Security Performance / Test UI
22. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle Media Navigation Security Performance / Test UI Graphics
23. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle Media Navigation Security Performance / Test UI Graphics Data
24. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components Lifecycle Media Navigation Security Performance / Test UI Graphics Data Beyond phones
25. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
29. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
30. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
31. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
32. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
33. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
34. • Jetpack libraries (components) can have subordinate components (Maven artifacts) • Among others: ◦ compose ◦ privacysandbox ◦ wear • Some subordinate artefacts are mentioned in the Jetpack overview docs explicitly • …others aren’t
35. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
36. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
37. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
38. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
39. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
40. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
41. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
42. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components
43. activity ads annotation appcompat appsearch arch.core asynclayoutinflater autofill benchmark biometric bluetooth browser car-app camera cardview collection compose compose.animation compose.compiler compose.foundation compose.material compose.material3 compose.runtime compose.ui concurrent constraintlayout contentpager coordinatorlayout core core.uwb credentials cursoradapter customview databinding datastore documentfile draganddrop drawerlayout dynamicanimation emoji emoji2 enterprise exifinterface fragment games glance graphics gridlayout health health.connect heifwriter hilt input interpolator javascriptengine jetifier leanback legacy lifecycle lint loader localbroadcastmanager media media2 media3 mediarouter multidex metrics navigation paging palette percentlayout preference print privacysandbox.activity privacysandbox.ads privacysandbox.plugins privacysandbox.sdkruntime privacysandbox.tools privacysandbox.ui profileinstaller recommendation recyclerview remotecallback resourceinspection room savedstate security sharetarget slice slidingpanelayout startup sqlite swiperefreshlayout test test.uiautomator textclassifier tracing transition tv tvprovider vectordrawable versionedparcelable viewpager viewpager2 wear wear.compose wear.protolayout wear.tiles wear.watchface webkit window window.extensions.core work Material Design Components .role
44. Palette • Extract representative color palettes from images • Latest update: September 21, 2018 • Stable Release: 1.0.0 (androidx.palette:palette-ktx:1.0.0) • Package: androidx.palette.graphics
49. androidx.activity is a transitive dependency
51. • Palette is a helper class to extract prominent colors from an image • A number of colors with different profiles are extracted: ◦ Vibrant, Vibrant Dark, Vibrant Light ◦ Muted, Muted Dark, Muted Light • Swatch represents a color swatch generated from an image's palette. The RGB color can be retrieved by getting rgb
53. Emoji2 • Display emoji in current and older devices • Latest update: December 13, 2023 • Stable Release: 1.4.0 • Alpha Release: 1.5.0-alpha01 (androidx.emoji2:emoji2-emojipicker:1.5.0-alpha01) • Package: androidx.emoji2.emojipicker https://developer.android.com/jetpack/androidx/releases/emoji2
54. https://developer.android.com/reference/kotlin/androidx/emoji2/emojipicker/package-summary
57. Core-Role • Name and documentation for roles that might be available in the system • Latest update: December 15, 2021 • Release Candidate: 1.1.0-rc01 (androidx.core:core-role:1.1.0-rc01) • Package: androidx.core.role One of the smallest Jetpack libraries
59. What is a role? • Unique name within the system associated with certain privileges • Roles currently defined: ROLE_ASSISTANT, ROLE_BROWSER, ROLE_CALL_REDIRECTION, ROLE_CALL_SCREENING, ROLE_DIALER, ROLE_EMERGENCY, ROLE_HOME, ROLE_NOTES, ROLE_SMS, ROLE_WALLET • Systems not necessarily support all roles, so always query if the role is available using isRoleAvailable
60. • While multiple applications may qualify for a role, only a subset can become role holders • To qualify for a role, apps must meet certain requirements, for example defining certain components in the manifest • Requirements can be found in androidx.core.role.RoleManagerCompat
65. • Since the last Jetpack library update, the framework class RoleManager received additions, for example ROLE_NOTES (API level 34) • RoleManagerCompat lacks factory functions that ensure a consistent behavior on older Android versions (RoleManager was added with API level 29) • In its current form Core-Role looks more than some sort of documentation than a component
67. • Jetpack covers a wide area from obvious to niche • Documentation for the rock star libraries is excellent • Older libraries need a documentation update (often, links no longer work)
68. • Documentation landing page no longer reflects the current state of Jetpack ◦ Subordinate artifacts are not always reflected ◦ Deprecated clone versions are not immediately noticeable ◦ The categories should be revised and updated • Taking into account all subordinate libraries, Jetpack likely has almost 200 artifacts ◦ Are their transitive dependencies still manageable? ◦ Makes this fine-grained approach still sense? • Is shifting even more functionality from the framework to Jetpack a wise approach?
69. • The more libraries your app consumes, the more important the use of baseline profiles becomes • Still, maybe at some point the ahead of time compilation must be done before downloading the app
70. https://www.thomaskuenneth.de Thank You!