本文实例讲述了Android编程实现仿美团或淘宝的多级分类菜单效果。分享给大家供大家参考,具体如下:
这里要实现的是诸如美团/淘宝/百度糯米 多级分类菜单效果。当分类数量非常多时可以考虑采用两级分类,而诸如美团这种表现方式是一个不错的选择。
首先上效果图:
主要代码:
1. PopupWindow初始化过程:
popupWindow = new PopupWindow(this); View view = LayoutInflater.from(this).inflate(R.layout.popup_layout, null); leftLV = (ListView) view.findViewById(R.id.pop_listview_left); rightLV = (ListView) view.findViewById(R.id.pop_listview_right); popupWindow.setContentView(view); popupWindow.setBackgroundDrawable(new PaintDrawable()); popupWindow.setFocusable(true); popupWindow.setHeight(ScreenUtils.getScreenH(this) * 2 / 3); popupWindow.setWidth(ScreenUtils.getScreenW(this)); popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() { @Override public void onDismiss() { darkView.startAnimation(animOut); darkView.setVisibility(View.GONE); leftLV.setSelection(0); rightLV.setSelection(0); } });
2.左侧菜单点击事件:
//左侧ListView点击事件 leftLV.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //二级数据 List<SecondClassItem> list2 = firstList.get(position).getSecondList(); //如果没有二级类,则直接跳转 if (list2 == null || list2.size() == 0) { popupWindow.dismiss(); int firstId = firstList.get(position).getId(); String selectedName = firstList.get(position).getName(); handleResult(firstId, -1, selectedName); return; } FirstClassAdapter adapter = (FirstClassAdapter) (parent.getAdapter()); //如果上次点击的就是这一个item,则不进行任何操作 if (adapter.getSelectedPosition() == position){ return; } //根据左侧一级分类选中情况,更新背景色 adapter.setSelectedPosition(position); adapter.notifyDataSetChanged(); //显示右侧二级分类 updateSecondListView(list2, secondAdapter); } });
3. 右侧菜单点击事件:
//右侧ListView点击事件 rightLV.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //关闭popupWindow,显示用户选择的分类 popupWindow.dismiss(); int firstPosition = firstAdapter.getSelectedPosition(); int firstId = firstList.get(firstPosition).getId(); int secondId = firstList.get(firstPosition).getSecondList().get(position).getId(); String selectedName = firstList.get(firstPosition).getSecondList().get(position) .getName(); handleResult(firstId, secondId, selectedName); } });
4.顶部标签点击事件(即显示/隐藏 分类菜单)
if (popupWindow.isShowing()) { popupWindow.dismiss(); } else { popupWindow.showAsDropDown(findViewById(R.id.main_div_line)); popupWindow.setAnimationStyle(-1); //背景变暗 darkView.startAnimation(animIn); darkView.setVisibility(View.VISIBLE); }
5.根据左侧点击,刷新右侧ListView
//刷新右侧ListView private void updateSecondListView(List<SecondClassItem> list2, SecondClassAdapter secondAdapter) { secondList.clear(); secondList.addAll(list2); secondAdapter.notifyDataSetChanged(); }
完整实例代码点击此处本站下载。
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希望本文所述对大家Android程序设计有所帮助。