Android App User Interface Redesign

Hello Freelancers, We need an Android App UI designer to redesign the layouts for about 9 activities in our finished Android App so that it looks appealing and great and enhances user experience. We will be providing the screenshots of all the activities and current layout xmls and images used in them. Primary task would be to redesign the UI. After the redesign we will need the new png images used, xml layouts, .psd if any and any other resources we would need to incorporate in the code for the App. Please submit any android app UI design work that you have done for review. We would require signing of a preliminary NDA which is basic since you will be working with the core concept of the App.