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What was installed in $ANDROID_HOME (~/Library/Android/sdk) on 2026-08-27, taken
before the platform jars for API 21-37 were added to generate the Android typings.
These were present with their complete contents (data/, skins/, templates/,
sources and stubs). Platforms added afterwards to generate typings hold only
android.jar; reinstalling one restores it in full.
API 21-37 were installed to merge the Android typings. Everything except
android.jar, package.xml and source.properties was deleted from each newly
installed platform, which keeps them around 25 MB instead of ~130 MB. Reinstall any
of them with the command at the top to get the full platform back.
Platform
Size
Contents
android-21
25M
android.jar only
android-22
25M
android.jar only
android-23
23M
android.jar only
android-24
33M
android.jar only
android-25
33M
android.jar only
android-26
25M
android.jar only
android-27
28M
android.jar only
android-28
166M
full (pre-existing)
android-29
20M
android.jar only
android-30
21M
android.jar only
android-31
117M
full (pre-existing)
android-32
26M
android.jar only
android-33
26M
android.jar only
android-34
126M
full (pre-existing)
android-35
130M
full (pre-existing)
android-36
134M
full (pre-existing)
android-36.1
27M
android.jar only
android-37.0
41M
android.jar only
android-37.1
47M
android.jar + data/api-versions.xml
android-37.1 also keeps data/api-versions.xml, the file that records the API level every
class and member appeared in. It is the only platform data file kept, and only for the newest
platform, because the dts-generator reads it to annotate merged typings.
There is no stable platforms;android-37.2; it exists only as android-37.2-beta1
through -beta3, so 37.1 is the newest stable platform and the one the typings
are generated from.