Added usage example

README.md

@@ -6,15 +6,50 @@ This is an android sdk for woocommerce
 
 Built-based on the documentation: http://woocommerce.github.io/woocommerce-rest-api-docs/#introduction
 
+## Installation
 
-#### Maven dependency:
+### Maven dependency:
 ```xml
 TODO
 ```
 
-#### Gradle dependency:
+### Gradle dependency:
 TODO
 
-#### Usage
+## Getting started
 
-TODO
+Generate API credentials (Consumer Key & Consumer Secret) following this instructions <http://docs.woocommerce.com/document/woocommerce-rest-api/>
+.
+
+Check out the WooCommerce API endpoints and data that can be manipulated in <https://woocommerce.github.io/woocommerce-rest-api-docs/>.
+
+## Setup
+
+Setup for the new WP REST API integration (WooCommerce 2.6 or later):
+
+```kotlin
+ val woocommerce = Woocommerce.Builder()
+            .setSiteUrl("http://example.com")
+            .setApiVersion("2")
+            .setConsumerKey("ck_XXXXX")
+            .setConsumerSecret("cs_XXXX")
+            .build()
+```
+
+## Usage
+Getting products example
+
+```kotlin
+  woocommerce.products.enqueue(object : Callback<ArrayList<Product>> {
+            override fun onResponse(call: Call<ArrayList<Product>>, response: Response<ArrayList<Product>>) {
+                val products = response.body()
+                for (product in products!!) {
+                    tvText.append(product.title + "\n")
+                }
+            }
+
+            override fun onFailure(call: Call<ArrayList<Product>>, t: Throwable) {
+
+            }
+        })
+```