java - Webview keeps leaking memory in android -

i using in app webview widget show google maps kml overlay on it. when call loadurl() function memory increases every time.

i have put code:

     if(webview!=null){         webview.destroydrawingcache();         webview.stoploading();         webview.clearcache(true);         webview.clearhistory();         webview.freememory();         webview.destroy();         webview = null;         system.gc();         } 

to create new webview every time need it, nothing i've read , other responses no 1 gives answer.

any ideas?

thanks in advance.