Add build step description for android/gradle to README.md

README.md

@@ -47,7 +47,7 @@ Whitepace in this file is mostly ignored. If you absolutely need to put spaces a
 			en = No
 			fr = Non
 			ja = いいえ
-	
+
 	[[Errors]]
 		[path_not_found_error]
 			en = The file '%@' could not be found.
@@ -57,7 +57,7 @@ Whitepace in this file is mostly ignored. If you absolutely need to put spaces a
 			en = The network is currently unavailable.
 			tags = app1
 			comment = An error describing when the device can not connect to the internet.
-	
+
 	[[Escaping Example]]
 		[list_item_separator]
 			en = `, `
@@ -84,7 +84,7 @@ If you would like to enable twine to create language files in another format, cr
 ## Usage
 
 	Usage: twine COMMAND STRINGS_FILE [INPUT_OR_OUTPUT_PATH] [--lang LANG1,LANG2...] [--tags TAG1,TAG2,TAG3...] [--format FORMAT]
-	
+
 ### Commands
 
 #### `generate-string-file`
@@ -149,6 +149,8 @@ The easiest way to create your first strings.txt file is to run the `consume-all
 
 ## Twine and Your Build Process
 
+### Xcode
+
 It is easy to incorporate Twine right into your iOS and OS X app build processes.
 
 1. In your project folder, create all of the `.lproj` directories that you need. It does not really matter where they are. We tend to put them in `Resources/Locales/`.
@@ -165,6 +167,21 @@ It is easy to incorporate Twine right into your iOS and OS X app build processes
 
 Now, whenever you build your application, Xcode will automatically invoke Twine to make sure that your `.strings` files are up-to-date.
 
+### Android Studio/Gradle
+
+Add the following task at the top level in app/build.gradle:
+```
+task generateStrings {
+    String script = 'if hash twine 2>/dev/null; then twine generate-string-file strings.txt ./src/main/res/values/generated_strings.xml; fi'
+    exec {
+        executable "sh"
+        args '-c', script
+    }
+}
+
+Now every time you build your app the strings are generated from the twine file.
+
+
 ## User Interface
 
 * [Twine TextMate 2 Bundle](https://github.com/mobiata/twine.tmbundle) — This [TextMate 2](https://github.com/textmate/textmate) bundle will make it easier for you to work with Twine strings files. In particular, it lets you use code folding to easily collapse and expand both strings and sections.