使用 Jetifier 工具的 AndroidX 迁移将支持库转换为 RC 版本

Question

在迁移到 Android X 的过程中，tt 似乎 Jetifier 工具将一些 3rd 方库转换为 RC 版本（gradle-4.6）。

 |    +--- com.facebook.android:facebook-common:4.34.0
|    |    |    +--- com.facebook.android:facebook-core:4.34.0 (*)
|    |    |    +--- com.google.zxing:core:3.3.0
|    |    |    +--- androidx.legacy:legacy-support-v4:1.0.0-rc01
|    |    |    |    +--- androidx.core:core:1.0.0-rc01 -> 1.0.1 (*)
|    |    |    |    +--- androidx.media:media:1.0.0-rc01
|    |    |    |    |    +--- androidx.annotation:annotation:1.0.0-rc01 -> 1.0.0
|    |    |    |    |    +--- androidx.core:core:1.0.0-rc01 -> 1.0.1 (*)
|    |    |    |    |    \--- androidx.versionedparcelable:versionedparcelable:1.0.0-rc01 -> 1.0.0 (*)
|    |    |    |    +--- androidx.legacy:legacy-support-core-utils:1.0.0-rc01 -> 1.0.0 (*)
|    |    |    |    +--- androidx.legacy:legacy-support-core-ui:1.0.0-rc01 -> 1.0.0 (*)
|    |    |    |    \--- androidx.fragment:fragment:1.0.0-rc01 -> 1.0.0 (*)
|    |    |    +--- androidx.appcompat:appcompat:1.0.0-rc01 -> 1.0.2 (*)
|    |    |    +--- androidx.cardview:cardview:1.0.0-rc01 -> 1.0.0 (*)
|    |    |    \--- androidx.browser:browser:1.0.0-rc01
|    |    |         +--- androidx.core:core:1.0.0-rc01 -> 1.0.1 (*)
|    |    |         +--- androidx.annotation:annotation:1.0.0-rc01 -> 1.0.0
|    |    |         +--- androidx.interpolator:interpolator:1.0.0-rc01 -> 1.0.0 (*)
|    |    |         +--- androidx.collection:collection:1.0.0-rc01 -> 1.0.0 (*)
|    |    |         \--- androidx.legacy:legacy-support-core-ui:1.0.0-rc01 -> 1.0.0 (*)

有没有我可以强制只采用稳定（固定）版本的解决方案？

Answer 1

嗯，挖了jetifier源码，好像jetifier自带的gradle-4.6版本是alpha10：

/gradle/m2repository/com/android/tools/build/jetifier/jetifier-processor/1.0.0-alpha10/jetifier-processor-1.0.0-alpha10.jar /gradle/m2repository/com/android/tools/build/jetifier/jetifier-core/1.0.0-alpha10/jetifier-core-1.0.0-alpha10.jar

此包中的本地映射文件 jetifier 将一些支持库转换为 RC 版本。

添加一个更新的 jetifier 依赖可以解决这个问题（top build.gradle）：

 classpath 'com.android.tools.build.jetifier:jetifier-core:1.0.0-beta02'
 classpath 'com.android.tools.build.jetifier:jetifier-processor:1.0.0-beta02'

以下是 facebook 依赖树的结果：

+--- com.facebook.android:facebook-common:4.34.0
|    |    |    +--- com.facebook.android:facebook-core:4.34.0 (*)
|    |    |    +--- com.google.zxing:core:3.3.0
|    |    |    +--- androidx.legacy:legacy-support-v4:1.0.0
|    |    |    |    +--- androidx.core:core:1.0.0 -> 1.0.1 (*)
|    |    |    |    +--- androidx.media:media:1.0.0
|    |    |    |    |    +--- androidx.annotation:annotation:1.0.0
|    |    |    |    |    +--- androidx.core:core:1.0.0 -> 1.0.1 (*)
|    |    |    |    |    \--- androidx.versionedparcelable:versionedparcelable:1.0.0 (*)
|    |    |    |    +--- androidx.legacy:legacy-support-core-utils:1.0.0 (*)
|    |    |    |    +--- androidx.legacy:legacy-support-core-ui:1.0.0 (*)
|    |    |    |    \--- androidx.fragment:fragment:1.0.0 (*)
|    |    |    +--- androidx.appcompat:appcompat:1.0.0 -> 1.0.2 (*)
|    |    |    +--- androidx.cardview:cardview:1.0.0 (*)
|    |    |    \--- androidx.browser:browser:1.0.0
|    |    |         +--- androidx.core:core:1.0.0 -> 1.0.1 (*)
|    |    |         +--- androidx.annotation:annotation:1.0.0
|    |    |         +--- androidx.interpolator:interpolator:1.0.0 (*)
|    |    |         +--- androidx.collection:collection:1.0.0 (*)
|    |    |         \--- androidx.legacy:legacy-support-core-ui:1.0.0 (*)