Create README.md

Author: jrvansuita

README.md

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+# CheckNewAppVersionAvailable
+This class makes a request to Play Store to check if there is a new version of your published app. Then, you can notify your users to do the update.
+
+# Porpouse
+
+This class makes a request to the Play Store to check if there is a new version of your published app. Depends on that, you can notify your users to then,  do the update.
+
+# Usage
+
+
+# Implementation
+
+    new CheckNewAppVersion(yourContext).setOnTaskCompleteListener(new CheckNewAppVersion.ITaskComplete() {
+        @Override
+        public void onTaskComplete(CheckNewAppVersion.Result result) {
+
+            //Checks if there is a new version available on Google Play Store.
+            result.hasNewVersion();
+
+            //Get the new published version code of the app.
+            result.getNewVersionCode();
+
+            //Get the app current version code.
+            result.getOldVersionCode();
+
+            //Opens the Google Play Store on your app page to do the update.
+            result.openUpdateLink();
+        }
+    }).execute();