How to use IActivityWatcher
<p>Hi Can anyone tell me how IActivityWatcher interface is used??</p>

<p>I'm trying to develop an application that records the amount of time that all installed applications were run. It is similar to an application "AppUsage" on Google play. When i decompiled it and checked he is using IActivityWatcher interface in his app. I googled regarding the same but hardly finding very little info which is not enough to proceed. Please help. </p>
