Improve Android Quick Start Guide

site/user/quick/android.md

Index: site/user/quick/android.md
diff --git a/site/user/quick/android.md b/site/user/quick/android.md
index bffde08b8126c10b56143b5a75b9c9c3faef5244..a0c2ddf5d850e362046a1d7e46cc31106437f056 100644
--- a/site/user/quick/android.md
+++ b/site/user/quick/android.md
@@ -23,6 +23,7 @@ scripts, Android specific dependencies, and the Android Sample App.
 You may need to [install other dependencies](./linux#prerequisites):
 
     tools/install_dependencies.sh
+    bin/sync-and-gyp

[djsollen, 2016/04/25 18:35:16]

I'll upload a CL to make this a little more clear as you'll need to run this
step anytime you sync the source code.

[liyuqian, 2016/04/25 19:10:11]

Done.

 
 Setup the Android SDK
 ---------------------
@@ -56,7 +57,8 @@ The android_ninja script is a wrapper for the ninja command (provided by
 depot_tools) and is specifically designed to work with the Skia's build
 system. To use the script you need to call it from Skia's trunk directory with
 the -d option plus any of the options or arguments you would normally pass to
-ninja (see descriptions of some of the other flags here).
+ninja (see descriptions of some of the other flags here). Please make sure
+that Android SDK Build-tools 22.0.1 is installed.

[djsollen, 2016/04/25 18:35:16]

move this to the "setup the android sdk" section and in its own paragraph
provide details for how to do it (like in your doc).

[liyuqian, 2016/04/25 19:10:11]

Done.

 
     export ANDROID_SDK_ROOT=/path/to/android/sdk
     export ANDROID_HOME=/path/to/android/sdk