title: how to keep track of which applications used most in android phone
body: <p>HI , </p>
  
  <p>I need to keep track of installed applications which are used most and least in android device...  can anyone help me how to do this programmatically in android...?? </p>
  
  <p>My question some thing like , I need to capture the event/Intent which will/may happen when the apllication is launched every time...(like BOOT_COMPLETED will be brodcasted when device booted).</p>