java - How can I randomly place ImageButtons and prevent them from overlapping? -

i want create array imagebutton prevent overlapping of objects , want add after params.height. question how that?

here code far:

public class play extends activity implements onclicklistener {     final context context = this;     mediaplayer mplayer;     mediaplayer mplplayer1;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_play);         text = (textview) this.findviewbyid(r.id.textview2);         countdowntimer = new mycountdowntimer(starttime, interval);         text.settext(text.gettext() + string.valueof(starttime / 1000));         relativelayout rl = (relativelayout) findviewbyid(r.id.relativelayout1);         rl.setbackgroundresource(r.drawable.background);         /*          * for-loop creates imagebutton , place them in random          * position problem overlapping how          * prevent it?          */         (int = 0; < 10; i++) {             imagebutton btn = new imagebutton(this);             btn.setbackgroundresource(r.drawable.apple);             relativelayout.layoutparams params = new relativelayout.layoutparams(                     layoutparams.wrap_content, layoutparams.wrap_content);             btn.setlayoutparams(params);             params.width = 83;             params.height = 80;             int left = (int) (math.random() * 1024 + 83);             int right = (int) (math.random() * 600 + 20);             if (left == 600 & right == 600) {                 params.setmargins(left, 10 + 2, right, 0);             } else                 params.setmargins(left, 50 - 1, right, 0);             btn.setlayoutparams(params);             rl.addview(btn);             btn.setid(i);             btn.setonclicklistener(this);         }     } } 

      int left = (int) (math.floor((math.random()*1024)/83.0) * 83 + 83);       int right = (int) (math.floor((math.random()*600)/80.0)*80 + 20); 

that separate each random number width , height of buttons.