发疯的产品要做一个可以单选和多选的下拉列表，陪你玩玩吧。
直接上效果：
文章图片
实现方案：
我的思路是自定义一个类继承PopupWindow，里面的选项采用Listview，再结合一些动画来实现。
核心代码：
public class MultiSelectPopupWindows extends PopupWindow {private Context context;
private View parent;
private List data;
private int yStart;
private SearchPopupWindowsAdapter adapter;
public MultiSelectPopupWindows(Context context, View parent, int yStart, List data) {
this.context = context;
this.parent = parent;
this.yStart = yStart;
this.data = https://www.it610.com/article/data;
initView();
}private void initView() {
View view = View.inflate(context, R.layout.popupwindows_multiselect, null);
view.startAnimation(AnimationUtils.loadAnimation(context, R.anim.fade_in_slow));
LinearLayout linearLayout = (LinearLayout) view.findViewById(R.id.linearLayout_selector);
linearLayout.startAnimation(AnimationUtils.loadAnimation(context, R.anim.list_top_in));
ListView listView = (ListView) view.findViewById(R.id.listView_selector);
setWidth(ViewGroup.LayoutParams.MATCH_PARENT);
setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
setBackgroundDrawable(new BitmapDrawable());
setFocusable(true);
setOutsideTouchable(true);
setContentView(view);
showAtLocation(parent, Gravity.TOP, 0, DensityUtil.dip2px(context, yStart));
update();
initListView(listView, data);
}private void initListView(ListView listView, List data) {
adapter = new SearchPopupWindowsAdapter(context);
adapter.setItems(data);
listView.setAdapter(adapter);
}public List getItemList() {
return adapter.getItemList();
}}项目源码：
【Android应用软件开发|Android自定义单选多选下拉列表】https://github.com/hfrommane/MultiSelectPopupWindows
