HelloWorld.java

public class HelloWorld extends Plugin {
	public PluginResult execute(String action, JSONArray args, String callbackId) {
		if (action.equals("sayHello")) {
			return new PluginResult(PluginResult.Status.OK, "HELLO FROM NATIVE CODES!");
		} 
		else {
			return new PluginResult(PluginResult.Status.INVALID_ACTION);
		}
	}
}