android.support已死，androidx當立——棄用support庫指南
摘要：
前言
androidx 是對 android.support.xxx 包的整理後產物。由於之前的support包過於混亂，所以，google推出了 androidX。
自support v7:28.+開始，大部分support包都會遷移到androidx下，，所以建議開發者們儘早將專案...
前言
androidx 是對 android.support.xxx 包的整理後產物。由於之前的support包過於混亂，所以，google推出了 androidX。
自support v7:28.+開始，大部分support包都會遷移到androidx下，，所以建議開發者們儘早將專案轉移到androidx下
遷移步驟
1. 
2.使用Android Studio自動遷移
在選單欄中依次進入Refactor > Migrate to AndroidX，之後as會提示備份專案，如果已備份就不用勾選備份選項。
AS截圖
遷移完成之後，gradle.properties裡會多出這兩行
android.useAndroidX=true android.enableJetifier=true
如果你的專案中沒有使用任何三方依賴，那麼android.enableJetifier可以設定為false
3. 舊依賴包名與新包名對照表（建議使用Ctrl + F搜尋）
執行Migrate to AndroidX完成之後，雖然常用的support包都會被轉成對應的androidx裡的包名，但還是依然有部分包名未能轉換成功，這時候需要我們手動修改。
| 原包名 | 新包名 |
|---|---|
| android.arch.core:common | androidx.arch.core:core-common |
| android.arch.core:core | androidx.arch.core:core |
| android.arch.core:core-testing | androidx.arch.core:core-testing |
| android.arch.core:runtime | androidx.arch.core:core-runtime |
| android.arch.lifecycle:common | androidx.lifecycle:lifecycle-common |
| android.arch.lifecycle:common-java8 | androidx.lifecycle:lifecycle-common-java8 |
| android.arch.lifecycle:compiler | androidx.lifecycle:lifecycle-compiler |
| android.arch.lifecycle:extensions | androidx.lifecycle:lifecycle-extensions |
| android.arch.lifecycle:livedata | androidx.lifecycle:lifecycle-livedata |
| android.arch.lifecycle:livedata-core | androidx.lifecycle:lifecycle-livedata-core |
| android.arch.lifecycle:reactivestreams | androidx.lifecycle:lifecycle-reactivestreams |
| android.arch.lifecycle:runtime | androidx.lifecycle:lifecycle-runtime |
| android.arch.lifecycle:viewmodel | androidx.lifecycle:lifecycle-viewmodel |
| android.arch.paging:common | androidx.paging:paging-common |
| android.arch.paging:runtime | androidx.paging:paging-runtime |
| android.arch.paging:rxjava2 | androidx.paging:paging-rxjava2 |
| android.arch.persistence.room:common | androidx.room:room-common |
| android.arch.persistence.room:compiler | androidx.room:room-compiler |
| android.arch.persistence.room:guava | androidx.room:room-guava |
| android.arch.persistence.room:migration | androidx.room:room-migration |
| android.arch.persistence.room:runtime | androidx.room:room-runtime |
| android.arch.persistence.room:rxjava2 | androidx.room:room-rxjava2 |
| android.arch.persistence.room:testing | androidx.room:room-testing |
| android.arch.persistence:db | androidx.sqlite:sqlite |
| android.arch.persistence:db-framework | androidx.sqlite:sqlite-framework |
| com.android.support.constraint:constraint-layout | androidx.constraintlayout:constraintlayout |
| com.android.support.constraint:constraint-layout-solver | androidx.constraintlayout:constraintlayout-solver |
| com.android.support.test.espresso.idling:idling-concurrent | androidx.test.espresso.idling:idling-concurrent |
| com.android.support.test.espresso.idling:idling-net | androidx.test.espresso.idling:idling-net |
| com.android.support.test.espresso:espresso-accessibility | androidx.test.espresso:espresso-accessibility |
| com.android.support.test.espresso:espresso-contrib | androidx.test.espresso:espresso-contrib |
| com.android.support.test.espresso:espresso-core | androidx.test.espresso:espresso-core |
| com.android.support.test.espresso:espresso-idling-resource | androidx.test.espresso:espresso-idling-resource |
| com.android.support.test.espresso:espresso-intents | androidx.test.espresso:espresso-intents |
| com.android.support.test.espresso:espresso-remote | androidx.test.espresso:espresso-remote |
| com.android.support.test.espresso:espresso-web | androidx.test.espresso:espresso-web |
| com.android.support.test.janktesthelper:janktesthelper | androidx.test.jank:janktesthelper |
| com.android.support.test.services:test-services | androidx.test:test-services |
| com.android.support.test.uiautomator:uiautomator | androidx.test.uiautomator:uiautomator |
| com.android.support.test:monitor | androidx.test:monitor |
| com.android.support.test:orchestrator | androidx.test:orchestrator |
| com.android.support.test:rules | androidx.test:rules |
| com.android.support.test:runner | androidx.test:<span>runner |
| com.android.support:animated-vector-drawable | androidx.vectordrawable:vectordrawable-animated |
| com.android.support:appcompat-v7 | androidx.appcompat:appcompat |
| com.android.support:asynclayoutinflater | androidx.asynclayoutinflater:asynclayoutinflater |
| com.android.support:car | androidx.car:<span>car |
| com.android.support:cardview-v7 | androidx.cardview:cardview |
| com.android.support:collections | androidx.collection:collection |
| com.android.support:coordinatorlayout | androidx.coordinatorlayout:coordinatorlayout |
| com.android.support:cursoradapter | androidx.cursoradapter:cursoradapter |
| com.android.support:customtabs | androidx.browser:browser |
| com.android.support:customview | androidx.customview:customview |
| com.android.support:design | com.google.android.material:material:1.0.0-rc01 |
| com.android.support:documentfile | androidx.documentfile:documentfile |
| com.android.support:drawerlayout | androidx.drawerlayout:drawerlayout |
| com.android.support:exifinterface | androidx.exifinterface:exifinterface |
| com.android.support:gridlayout-v7 | androidx.gridlayout:gridlayout |
| com.android.support:heifwriter | androidx.heifwriter:heifwriter |
| com.android.support:interpolator | androidx.interpolator:interpolator |
| com.android.support:leanback-v17 | androidx.leanback:leanback |
| com.android.support:loader | androidx.loader:loader |
| com.android.support:localbroadcastmanager | androidx.localbroadcastmanager:localbroadcastmanager |
| com.android.support:media2 | androidx.media2:media2:1.0.0-alpha03 |
| com.android.support:media2-exoplayer | androidx.media2:media2-exoplayer |
| com.android.support:mediarouter-v7 | androidx.mediarouter:mediarouter |
| com.android.support:multidex | androidx.multidex:multidex |
| com.android.support:multidex-instrumentation | androidx.multidex:multidex-instrumentation |
| com.android.support:palette-v7 | androidx.palette:palette |
| com.android.support:percent | androidx.percentlayout:percentlayout |
| com.android.support:preference-leanback-v17 | androidx.leanback:leanback-preference |
| com.android.support:preference-v14 | androidx.legacy:legacy-preference-v14 |
| com.android.support:preference-v7 | androidx.preference:preference |
| com.android.support:print | androidx.print:print |
| com.android.support:recommendation | androidx.recommendation:recommendation |
| com.android.support:recyclerview-selection | androidx.recyclerview:recyclerview-selection |
| com.android.support:recyclerview-v7 | androidx.recyclerview:recyclerview |
| com.android.support:slices-builders | androidx.slice:slice-builders |
| com.android.support:slices-core | androidx.slice:slice-core |
| com.android.support:slices-view | androidx.slice:slice-view |
| com.android.support:slidingpanelayout | androidx.slidingpanelayout:slidingpanelayout |
| com.android.support:support-annotations | androidx.annotation:annotation |
| com.android.support:support-compat | androidx.core:core |
| com.android.support:support-content | androidx.contentpager:contentpager |
| com.android.support:support-core-ui | androidx.legacy:legacy-support-core-ui |
| com.android.support:support-core-utils | androidx.legacy:legacy-support-core-utils |
| com.android.support:support-dynamic-animation | androidx.dynamicanimation:dynamicanimation |
| com.android.support:support-emoji | androidx.emoji:emoji |
| com.android.support:support-emoji-appcompat | androidx.emoji:emoji-appcompat |
| com.android.support:support-emoji-bundled | androidx.emoji:emoji-bundled |
| com.android.support:support-fragment | androidx.fragment:fragment |
| com.android.support:support-media-compat | androidx.media:media |
| com.android.support:support-tv-provider | androidx.tvprovider:tvprovider |
| com.android.support:support-v13 | androidx.legacy:legacy-support-v13 |
| com.android.support:support-v4 | androidx.legacy:legacy-support-v4 |
| com.android.support:support-vector-drawable | androidx.vectordrawable:vectordrawable |
| com.android.support:swiperefreshlayout | androidx.swiperefreshlayout:swiperefreshlayout |
| com.android.support:textclassifier | androidx.textclassifier:textclassifier |
| com.android.support:transition | androidx.transition:transition |
| com.android.support:versionedparcelable | androidx.versionedparcelable:versionedparcelable |
| com.android.support:viewpager | androidx.viewpager:viewpager |
| com.android.support:wear | androidx.wear:wear |
| com.android.support:webkit | androidx.webkit:webkit |