仿美团下拉筛选菜单——PopupDownMenu

package com.example.chitose.popupdemo.view; import android.content.Context; import android.graphics.drawable.Drawable; import android.support.v4.content.ContextCompat; import android.util.Log; import android.view.View; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.ListView; import android.widget.PopupWindow; import android.widget.Toast; import com.example.chitose.popupdemo.R; import com.example.chitose.popupdemo.adapter.PopAdapter; import com.example.chitose.popupdemo.entity.PopItem; import com.example.chitose.popupdemo.utils.PopupUtils; import java.util.ArrayList; import java.util.List; import static com.example.chitose.popupdemo.utils.StaticUtils.*; /** * * 类型：PopupWindow的包装类 * 作用：包装了PopupWindow，转换数据类型进以加载进列表中 * Created by Chitose on 2018/4/30. */ public class PopupDownMenu { private Context mContext; //popupWindow可以在activity中被调用 public PopupWindow popupWindow; //results[0]~results[2]都是用来存放点击结果，results[3]是作为“结果正常”的标识 public String[] results = new String[4]; //初始化两个存放PopItem的List private List<List<PopItem>> popList = new ArrayList<>(); //初始化两个用来改变第二第三列数据的mList private List<PopItem> mList = new ArrayList<>(); private List<PopItem> mList2 = new ArrayList<>(); //初始化三个ListView private ListView firstListView; private ListView secondListView; private ListView thirdListView; //初始化三个适配器 private PopAdapter firstAdapter; private PopAdapter secondAdapter; private PopAdapter thirdAdapter; List<PopItem> itemList; //仅一级时的下拉列表菜单栏 public PopupDownMenu(Context mContext, final List<PopItem> itemList, int width, int height, View view, Drawable drawable, ListView ... listViews) { this.mContext = mContext; this.itemList = itemList; if (listViews.length==0) { Toast.makeText(mContext, "数据不存在，请检查数据", Toast.LENGTH_SHORT).show(); return; } if(listViews.length>=1) this.firstListView = listViews[0]; if(listViews.length>=2) this.secondListView = listViews[1]; if(listViews.length>=3) this.thirdListView = listViews[2]; //为popList中的数据初始化 PopupUtils.popListInit(popList, itemList); //初始化状态（若第二列存在元素就显示→显示后若第三行有也同理显示） try { List<PopItem> temp1 = popList.get(popList.get(0).get(0).getId()); if (temp1 != null) { mList.addAll(temp1); List<PopItem> temp2 = popList.get(temp1.get(0).getId()); if (temp2 != null) { mList2.addAll(temp2); } } }catch (IndexOutOfBoundsException e){ e.printStackTrace(); } //辨别菜单列表的类型是一级，二级还是三级 switch (PopupUtils.popSort(itemList)) { case ONLY_ONE_POP: initOnePop(); break; case DOUBLE_POP: initDoublePop(); break; case TRIPLE_POP: initTriplePop(); break; default: Log.d("ERROR:","大于三级的列表暂未开发，请检查数据"); break; } //初始化PopupWindow popupWindow = new PopupWindow(view, width, height, true); popupWindow.setFocusable(false); popupWindow.setBackgroundDrawable(drawable); } /*一级菜单*/ private void initOnePop() { //Listview与适配器的初始化 firstAdapter = new PopAdapter(mContext, popList.get(0)); firstListView.setAdapter(firstAdapter); // 设置ListView点击事件监听 firstListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { firstAdapter.setSelectedPosition(position); // 一级菜单的选择可以直接通过itemList设置结果放入result[0]中 // results[0] = popList.get(0).get(position).getContent(); results[0] = itemList.get(position).getContent(); results[3] = FINISHED_FLAG; // 选择完后关闭popup窗口 popupWindow.dismiss(); } }); } /*二级菜单*/ private void initDoublePop() { //适配器的初始化 firstAdapter = new PopAdapter(mContext, popList.get(0)); firstListView.setAdapter(firstAdapter); secondAdapter = new PopAdapter(mContext, mList); secondListView.setAdapter(secondAdapter); firstListView.performItemClick(firstListView,0,firstListView.getItemIdAtPosition(0)); //点击事件 firstListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { firstAdapter.setSelectedPosition(position); results[3] = null; //选择了第一列元素相应的数据放到result[0]中 // results[0] = itemList.get(position).getContent(); results[0] = popList.get(0).get(position).getContent(); //尝试获取当前第一列选项的二级数据 List<PopItem> list2 = null; try { list2 = popList.get(popList.get(0).get(position).getId()); } catch (IndexOutOfBoundsException e) { e.printStackTrace(); } //如果没有二级数据，则直接跳转 if (list2 == null || list2.size() == 0) { mList.clear(); results[1] = null; //防止缓存上一次选项带来异常 results[3] = FINISHED_FLAG; popupWindow.dismiss(); } //如果有则替换并notify else { mList.clear(); mList.addAll(list2); secondAdapter.notifyDataSetChanged(); secondAdapter.setSelectedPosition(0); } } }); secondListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //选了第二列元素后第一列选值必定指向已选第二列元素的父节点元素 // for(PopItem item : popList.get(0)){ // if(item.getId()==mList.get(position).getPid()) { // results[0] = item.getContent(); // break; // } // } results[0] = itemList.get(mList.get(position).getPid()-1).getContent(); secondAdapter.setSelectedPosition(position); //选择了第二列元素相应的数据放到result[1]中 results[1] = mList.get(position).getContent(); results[3] = FINISHED_FLAG; popupWindow.dismiss(); } }); } /*三级菜单*/ private void initTriplePop() { //设置Adapter firstAdapter = new PopAdapter(mContext, popList.get(0)); firstListView.setAdapter(firstAdapter);