Equivalent of CSS class selectors for Android views? -

do android views have equivalent css class selectors? r.id usable multiple views? hide group of views independent of position in layout tree.

i think need iterate through of views in layout, looking android:id want. can use view setvisibility() change visibility. use view settag() / gettag() instead of android:id mark views want handle. e.g., following code uses general purpose method traverse layout:

// top view in layout. final view root = getwindow().getdecorview().findviewbyid(android.r.id.content);  // create "view handler" hide given view. final viewhandler setviewgone = new viewhandler() {     public void process(view v) {         // log.d("viewhandler.process", v.getclass().tostring());         v.setvisibility(view.gone);     } };  // hide view in layout id equals r.id.textview1. findviewsbyid(root, r.id.textview1, setviewgone);   /**  * simple "view handler" interface can pass java method.  */ public interface viewhandler {     public void process(view v); }  /**  * recursively descends layout hierarchy starting @ specified view. viewhandler's  * process() method invoked on view matches specified id.  */ public static void findviewsbyid(view v, int id, viewhandler viewhandler) {     if (v.getid() == id) {         viewhandler.process(v);     }     if (v instanceof viewgroup) {         final viewgroup vg = (viewgroup) v;         (int = 0; < vg.getchildcount(); i++) {             findviewsbyid(vg.getchildat(i), id, viewhandler);         }     } }