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This article mainly explains "Android how to achieve custom multi-selection drop-down list", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn "Android how to achieve custom single-selection multi-selection drop-down list" bar!

The effect is as follows:

Implementation plan:

My idea is to customize a class inheriting PopupWindow, in which the options use Listview, combined with some animation to achieve.

Core code:

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 = 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 () }} Thank you for your reading, the above is the content of "Android how to achieve custom single-selection drop-down list". After the study of this article, I believe you have a deeper understanding of how Android realizes the custom single-selection drop-down list, and the specific use still needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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