Problem during downloading android sdk

I don’t know why this happened!
since i’ve been working on this engine i couldn’t fix this problem.
i have 3 question
1- when i downloaded ue4 there was android work 1R2 Not 1R1
2-

![alt text][3]

3- is it necessary to install android sdk (i mean google sdks for android) before android works or this software automatically download then?

excuse me download them?

Hi GSF350:

Due to the large volume of questions and comments concerning the Engine, we did not have a chance to respond to your post at the time you submitted it. However, if you are still interested, the following documentation describes step by step how to properly install the Android SDK:

Required Android Setup

.