java - Cannot take view size using view tree observer -

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i tying width , height of view in adapter, while view not yet inflated, using viewtreeobserver, end 0 values. width , height going used in method resizes bitmap of imageview in listview in adapter. here code:

public view getview(int position, view convertview, viewgroup parent) {    	newview = convertview;  	viewholder holder;    	if (null == convertview) {  		holder = new viewholder();  		newview = inflater.inflate(r.layout.selfie_list_view, null);  		holder.selfieview = (imageview) newview.findviewbyid(r.id.selfie_bitmap);  		holder.selfiename = (textview) newview.findviewbyid(r.id.selfie_name);  		newview.settag(holder);  		  	} else {  		holder = (viewholder) newview.gettag();  	}  	  	selfierecord curr = list.get(position);  	string selfiename = curr.getbitmapname();  	string selfiepath = curr.getbitmappath();  	bitmap selfie = setpic(newview, selfiepath);  	  	holder.selfieview.setimagebitmap(selfie);  	holder.selfiename.settext(selfiename);    	return newview;  }      private bitmap setpic(final view view, string path) {  	  	viewtreeobserver vto = view.getviewtreeobserver();  	if (vto.isalive()) {  		vto.addongloballayoutlistener(new ongloballayoutlistener() {  			  			@override  			public void ongloballayout() {  				view.getviewtreeobserver().removeongloballayoutlistener(this);  				targetw = view.getwidth();  				targeth = view.getheight();  				log.i(tag, "view_width = " + targetw + " view_height =" + targeth);     				  			}  		});  	}  	      // dimensions of bitmap      bitmapfactory.options bmoptions = new bitmapfactory.options();      bmoptions.injustdecodebounds = true;      bitmapfactory.decodefile(path, bmoptions);      int photow = bmoptions.outwidth;      int photoh = bmoptions.outheight;        // determine how scale down image      int scalefactor = math.min(photow/targetw, photoh/targeth);        // decode image file bitmap sized fill view      bmoptions.injustdecodebounds = false;      bmoptions.insamplesize = scalefactor;      bmoptions.inpurgeable = true;        bitmap bitmap = bitmapfactory.decodefile(path, bmoptions);      	return bitmap;  }

any ideas appreciated.

well solved using onpredrawlistener , putting bitmap decoding , imageview inside it. here's solution in case needs it. thank anyway:

public view getview(int position, view convertview, viewgroup parent) {      newview = convertview;     final viewholder holder;      if (null == convertview) {         holder = new viewholder();         newview = inflater.inflate(r.layout.selfie_list_view, null);         holder.selfieview = (imageview) newview.findviewbyid(r.id.selfie_bitmap);         holder.selfiename = (textview) newview.findviewbyid(r.id.selfie_name);         newview.settag(holder);      } else {         holder = (viewholder) newview.gettag();     }      selfierecord curr = list.get(position);     string selfiename = curr.getbitmapname();     final string selfiepath = curr.getbitmappath();     //bitmap selfie = setpic(newview, selfiepath);      viewtreeobserver vto = holder.selfieview.getviewtreeobserver();     vto.addonpredrawlistener(new onpredrawlistener() {          @override         public boolean onpredraw() {             holder.selfieview.getviewtreeobserver().removeonpredrawlistener(this);             int width = holder.selfieview.getmeasuredwidth();             int height = holder.selfieview.getmeasuredheight();             log.i(tag, "view_width = " + width + " view_height =" + height);              bitmapfactory.options bmoptions = new bitmapfactory.options();             bmoptions.injustdecodebounds = true;             bitmapfactory.decodefile(selfiepath, bmoptions);             int photow = bmoptions.outwidth;             int photoh = bmoptions.outheight;             log.i(tag, "photo_width = " + photow + " view_height =" + photoh);              // determine how scale down image             int scalefactor = math.min(photow/width, photoh/height);              // decode image file bitmap sized fill view             bmoptions.injustdecodebounds = false;             bmoptions.insamplesize = scalefactor;             bmoptions.inpurgeable = true;             bitmap bitmap = bitmapfactory.decodefile(selfiepath, bmoptions);              holder.selfieview.setimagebitmap(bitmap);              return true;         }     });      holder.selfiename.settext(selfiename);      return newview; }

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