Android自定义单选多选下拉列表的实例代码

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：

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<Search> data;
 private int yStart;
 private SearchPopupWindowsAdapter adapter;

public MultiSelectPopupWindows(Context context, View parent, int yStart, List<Search> data) {
   this.context = context;
   this.parent = parent;
   this.yStart = yStart;
   this.data = 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<Search> data) {
   adapter = new SearchPopupWindowsAdapter(context);
   adapter.setItems(data);
   listView.setAdapter(adapter);
 }

public List getItemList() {
   return adapter.getItemList();
 }

}

项目源码：https://github.com/hfrommane/MultiSelectPopupWindows

来源：http://blog.csdn.net/hfrommane/article/details/76304113