android - How to resize my bitmap as 16*16 size or 32*32 -

i want resize bitmap image icon size.i have written 1 function that.but zoomed out.but want make image width , height smaller.its not decremented after width , height.how can zoom down icon size ?

here function..

            private bitmap getimagemap(file f){         try {             //decode image size             bitmapfactory.options o = new bitmapfactory.options();             o.injustdecodebounds = true;             bitmapfactory.decodestream(new fileinputstream(f),null,o);              //the new size want scale             final int required_size=80;              //find correct scale value. should power of 2.             int scale=1;             while(o.outwidth/scale/2>=required_size && o.outheight/scale/2>=required_size)                 scale*=2;              //decode insamplesize             bitmapfactory.options o2 = new bitmapfactory.options();             o2.insamplesize=scale;             return bitmapfactory.decodestream(new fileinputstream(f), null, o2);         } catch (filenotfoundexception e) {}         return null;     } 

this may helpful , easy,

   bitmap bmp=bitmap.createscaledbitmap(yourbitmap, 32, 32, false);