title: how to clear cache memory when the application exits by programatically
body: <p>friend's,
   I have set of images fetched from internet and set it on gridview,here i have option to click here to view more,below the grid view and it fetches images and set it on grid with prevoius set of images,when i exit the application and run it again,the previous set of images remain in cache and grid shows images from cache,here i need to clear my application cache memory,when i exited my application.how can i get it.</p>
  
  <p>Thanks in advance.</p>