问题
What version of Apache HttpClient is used in Android 4.2.2 SDK? I checked https://code.google.com/p/httpclientandroidlib/ but it does not seem correct, reason being AuthCache class is supposed to be in the Android 4.2.2 SDK if it is using the latest HttpClient.
回答1:
What version of Apache HttpClient is used in Android 4.2.2 SDK?
The same one as has been in every version of Android since the beginning. I think the official number is 4.0-beta-1, or possibly 4.0-beta-2. See https://stackoverflow.com/a/4818714/115145 for more.
https://code.google.com/p/httpclientandroidlib/ is a refactoring of HttpClient into a new package (ch.boye.httpclientandroidlib), to allow for it to exist in your VM at the same time as Android's older version of HttpClient.
来源：https://stackoverflow.com/questions/15658678/what-version-of-apache-httpclient-is-used-in-android-4-2-2-sdk