Android实现购物车添加物品的动画效果

前言：当我们写商城类的项目的时候，一般都会有加入购物车的功能，加入购物车的时候会有一些抛物线动画，最近做到这个功能，借助别人的demo写了一个。

效果：

开发环境：androidstudio2.1.2+gradle-2.10

涉及知识：1.沉浸式状态栏，2.单位精度计算(价格)，3.list之iterator。

部分代码：

public class mainactivity extends appcompatactivity implements foodadapter.foodactioncallback {
 private listview listview;
 private textview goods_all_pricetv;
 private textview good_numtv;
 private list<foodmodel> list;
 private list<foodmodel> selectlist = new arraylist<>();
 private foodadapter adapter = null;
 @override
 protected void oncreate(@nullable final bundle savedinstancestate) {
 super.oncreate(savedinstancestate);
 setcontentview(r.layout.activity_main);
 //沉浸式状态栏
 if (build.version.sdk_int >= build.version_codes.kitkat) {
 //透明状态栏
 getwindow().addflags(windowmanager.layoutparams.flag_translucent_status);
 //透明导航栏
 getwindow().addflags(windowmanager.layoutparams.flag_translucent_navigation);
 }
 listview = (listview) findviewbyid(r.id.listview);
 goods_all_pricetv = (textview) findviewbyid(r.id.goods_all_pricetv);
 good_numtv = (textview) findviewbyid(r.id.good_numtv);
 findviewbyid(r.id.goods_submit_tv).setonclicklistener(new view.onclicklistener() {
 @override
 public void onclick(view v) {
 if (null != selectlist && selectlist.size() > 0) {
 toast.maketext(mainactivity.this, "你一共加入购物车" + good_numtv.gettext() +
 "份商品,总价格为：" + goods_all_pricetv.gettext(), toast.length_short).show();
 } else {
 toast.maketext(mainactivity.this, "你的购物车为空", toast.length_short).show();
 }

 }
 });
 initdata();
 }
 private void initdata() {
 list = appconfig.factoryfoods();
 adapter = new foodadapter(this, list, this);
 listview.setadapter(adapter);
 }
 //添加商品动画
 @override
 public void addaction(view view, int item) {
 shoppingcartanimationview shoppingcartanimationview = new shoppingcartanimationview(this);
 int position[] = new int[2];
 view.getlocationinwindow(position);
 shoppingcartanimationview.setstartposition(new point(position[0], position[1]));
 viewgroup rootview = (viewgroup) this.getwindow().getdecorview();
 rootview.addview(shoppingcartanimationview);
 int endposition[] = new int[2];
 good_numtv.getlocationinwindow(endposition);
 shoppingcartanimationview.setendposition(new point(endposition[0], endposition[1]));
 shoppingcartanimationview.startbeizeranimation();
 foodmodel model = list.get(item);
 model.setnum(model.getnum() + 1);
 adapter.notifydatasetchanged();
 calculateprice();
 }
 //减少商品
 @override
 public void reducegood(int position) {
 foodmodel model = list.get(position);
 model.setnum(model.getnum() - 1);
 adapter.notifydatasetchanged();
 calculateprice();
 }
 //购物车份数+总价格计算
 private void calculateprice() {
 selectlist.clear();
 double price = 0;
 int num = 0;
 iterator<foodmodel> iterator = list.iterator();
 while (iterator.hasnext()) {
 foodmodel model = iterator.next();
 if (model.getnum() != 0) {
 selectlist.add(model);
 price += model.getprice() * model.getnum();
 num += model.getnum();
 }
 }
 goods_all_pricetv.settext("￥" + adapter.priceresult(price) + "元");
 good_numtv.settext(num + "");
 }
}

源码下载

以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，同时也希望多多支持！