Exercise 1 Preconditions:Developer has good Java skills and Android Developer Tools installed Objective:By working on this task student should learn UI and networking basics Estimation: 1 MD Requirements:1. Button in center of screen labeled “TEST”2. Once TEST button is pressed:- loading dialog appears (spinning animation)- app makes a connection to http://www.mobica.com/ in background3. If server responds with HTTP 200 (ignore response content) Toast message is displayed: SUCCESS. Otherwise Toast message is displayed: FAILURE.4. Loading dialog disappears after connection test is done.5. User presses rotates device from portrait to landscape (or other way). Requirement: Activity must not be closed (onDestroy() must not be called). Non-functional requirements:1. All public/protected classes and methods must have javadoc comments2. No inner or anonymous classes allowed3. Direct use of Thread class is forbidden4. UI thread must not be blocked by network operation Useful links:http://developer.android.com/reference/java/net/HttpURLConnection.htmlhttp://developer.android.com/reference/android/os/AsyncTask.htmlhttp://developer.android.com/reference/android/widget/Toast.html