Update sl4a readme to markdown format
-Verified the formatting in http://dillinger.io/
Bug: 27130256
Change-Id: I5a6330df46352b46257509e19964cd5ee49c1a7d
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+Scripting Layer For Android
+=============================
+
+### Introduction
+Originally authored by Damon Kohler, Scripting Layer for Android, SL4A, is an automation toolset
+for calling Android APIs in a platform-independent manner. It supports both remote automation via
+ADB as well as execution of scripts from on-device via a series of lightweight translation layers.
+
+### Build Instructions
+Due to its inclusion in AOSP as a privileged app, building SL4A requires a system build.
+
+For the initial build of Android:
+
+ cd <ANDROID_SOURCE_ROOT>
+ source build/envsetup.sh
+ lunch aosp_<TARGET>
+ make [-j15]
+
+*where <ANDROID_SOURCE_ROOT> is the root directory of the android tree and <TARGET> is the lunch
+target name*
+
+Then Build SL4A:
+
+ cd <ANDROID_SOURCE_ROOT>/packages/apps/Test/connectivity/sl4a
+ mm [-j15]
+
+### Adding SL4A Builds to Android Builds by Default
+1) If you are not using a custom buildspec, create one as follows:
+
+ cp <ANDROID_SOURCE_ROOT>/build/buildspec.mk.default <ANDROID_SOURCE_ROOT>/buildspec.mk
+
+2) Modify the buildspec to build SL4A as a custom module by editing
+ the line '#CUSTOM_MODULES:=' to 'CUSTOM_MODULES:=sl4a':
+
+ sed -i 's/#CUSTOM_MODULES:=/CUSTOM_MODULES:=sl4a/' <ANDROID_SOURCE_ROOT>/buildspec.mk
+
+### Install Instructions
+Run the following command:
+
+ adb install -r <ANDROID_SOURCE_ROOT>/out/target/product/<TARGET>/data/app/sl4a/sl4a.apk
+
+### Run Instructions
+a) SL4A may be launched from Android as a normal App; or
+b) To enable RPC access from the command prompt:
+
+ adb forward tcp:<HOST_PORT_NUM> tcp:<DEVICE_PORT_NUM>
+ adb shell "am start -a com.googlecode.android_scripting.action.LAUNCH_SERVER \
+ --ei com.googlecode.android_scripting.extra.USE_SERVICE_PORT <DEVICE_PORT_NUM> \
+ com.googlecode.android_scripting/.activity.ScriptingLayerServiceLauncher"
+*where <HOST_PORT_NUM> and <DEVICE_PORT_NUM> are the tcp ports on the host computer and device.*
+
+### Generate the API Documentation
+From SL4A source directory run this command:
+
+ perl Docs/generate_api_reference_md.pl
+
+In the Docs directory there should now be an ApiReference.md file that
+contains which RPC functions are available in SL4A as well as documentation
+for the RPC functions.
+