Any Native Android APP satisfying the criteria in attachment

Create a small Android app in Java, using Eclipse and the Android Development Tools plugin (as installed on SoC Linux PCs). The app should include at least two activities and use at least four different Android widgets. The Nexus 7 tablet should be your target device. Your app should perform a useful task of some kind, the nature of which is entirely up to you. For example, you could implement a converter for currencies or for different systems of weights & measures. Or you could implement an app that finds anagrams of words (useful for crossword solvers). Make use of data and services available over the internet if you wish. Be creative!