这篇文章主要介绍了Android自定义组件ListPopWindow的相关资料,需要的朋友可以参考下
先看一下效果：
效果就是这样，看一下实现，其实也没多难，就是想开源出来供小伙伴们使用，如有不合理地方，希望大家多多指正。
1.自定义PopWindow
首先我们分析一下，这样的效果肯定是一个PopWindow嵌套着listview，而上面的title、和下面的cancel是两个文本框，实现起来也比较简单。
然后我们在PopWindow中声明两个接口，用来回调cancel和item的点击事件
public interface OnPopItemClickListener{ void onPopItemClick(View view,int position); } public interface OnBottomTextviewClickListener{ void onBottomClick(); } 然后再设置一些PopWindow的一些属性
parentView = LayoutInflater.from(context).inflate(R.layout.list_popwindow,null); setContentView(parentView); lv = (ListView) parentView.findViewById(R.id.lv_popwindow); //设置弹出窗体的高 this.setWidth(ViewGroup.LayoutParams.MATCH_PARENT); this.setHeight(ViewGroup.LayoutParams.MATCH_PARENT); //设置弹出窗体可点击 this.setFocusable(true); //实例化一个ColorDrawable颜色为半透明 ColorDrawable dw = new ColorDrawable(0xb0000000); //设置SelectPicPopupWindow弹出窗体的背景 this.setBackgroundDrawable(dw);
看一下整体的代码吧：
public class ListPopWindow extends PopupWindow{ private Context context; //上下文 private View parentView; //父视图 private List dataList; //item数据源 private OnPopItemClickListener listener; //item点击接口 private ListView lv; //item列表视图 private View viewTop; //title视图 private String topText,bottomText; //title文字，bottom文字 private TextView tvTop,tvBottom; //title文本，bottom文本 private PopWindowAdapter adapter; //适配器 private OnBottomTextviewClickListener bottomListener;//底部点击接口 public interface OnPopItemClickListener{ void onPopItemClick(View view,int position); } public interface OnBottomTextviewClickListener{ void onBottomClick(); } public ListPopWindow(Context context,OnPopItemClickListener listener,OnBottomTextviewClickListener bottomListener, View parentView,List dataList,String bottomText,String topText){ this.context = context; this.listener = listener; this.parentView = parentView; this.dataList = dataList; this.bottomListener = bottomListener; this.topText = topText; this.bottomText = bottomText; initViews(); } private void initViews(){ parentView = LayoutInflater.from(context).inflate(R.layout.list_popwindow,null); setContentView(parentView); lv = (ListView) parentView.findViewById(R.id.lv_popwindow); //设置弹出窗体的高 this.setWidth(ViewGroup.LayoutParams.MATCH_PARENT); this.setHeight(ViewGroup.LayoutParams.MATCH_PARENT); //设置弹出窗体可点击 this.setFocusable(true); //实例化一个ColorDrawable颜色为半透明 ColorDrawable dw = new ColorDrawable(0xb0000000); //设置SelectPicPopupWindow弹出窗体的背景 this.setBackgroundDrawable(dw); //view添加OnTouchListener监听判断获取触屏位置如果在布局外面则销毁弹出框 parentView.setOnTouchListener(new View.OnTouchListener() { public boolean onTouch(View v, MotionEvent event) { int height = parentView.findViewById(R.id.ll_bottom).getTop(); int y = (int) event.getY(); if (event.getAction() == MotionEvent.ACTION_UP) { if (y > height) { dismiss(); } } return true; } }); update(); viewTop = parentView.findViewById(R.id.view_line1); tvBottom = (TextView) parentView.findViewById(R.id.tv_popwindow_bottom); tvTop = (TextView) parentView.findViewById(R.id.tv_popwindow_first); adapter = new PopWindowAdapter(context,dataList,false); lv.setAdapter(adapter); if (!TextUtils.isEmpty(topText)){ tvTop.setVisibility(View.VISIBLE); tvTop.setText(topText); viewTop.setVisibility(View.VISIBLE); } else { tvTop.setVisibility(View.GONE); viewTop.setVisibility(View.GONE); } if (!TextUtils.isEmpty(bottomText)){ tvBottom.setVisibility(View.VISIBLE); tvBottom.setText(bottomText); } else { tvBottom.setVisibility(View.GONE); } lv.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView adapterView, View view, int i, long l) { listener.onPopItemClick(view, i); } }); tvBottom.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { bottomListener.onBottomClick(); } }); } } 2.看一些item的bean
这里我就声明了title和图片的id
package com.hankkin.library; public class PopBean { private String title; private int icon_res; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public int getIcon_res() { return icon_res; } public void setIcon_res(int icon_res) { this.icon_res = icon_res; } public PopBean(String title, int icon_res) { this.title = title; this.icon_res = icon_res; } } 3.自定义adapter适配器
这里面可能要注意的就是item的背景设置，有的是上半部分圆角、有的是下半部分圆角，特殊处理一下
@Override public View getView(int i, View view, ViewGroup viewGroup) { ViewHolder holder; if (view == null) { view = inflater.inflate(R.layout.listview_popwindow_item, null); holder = new ViewHolder(); holder.tv_name = (TextView) view.findViewById(R.id.tv_title); holder.v_line = (View) view.findViewById(R.id.v_line); view.setTag(holder); } else { holder = (ViewHolder) view.getTag(); } holder.tv_name.setText(dataList.get(i).getTitle()); if (dataList.size() - 1 == i) { holder.v_line.setVisibility(View.INVISIBLE); holder.tv_name.setBackground(context.getResources().getDrawable(R.drawable.selector_bottom_half)); } else { holder.v_line.setVisibility(View.VISIBLE); holder.tv_name.setBackground(context.getResources().getDrawable(R.drawable.list_gray_item)); } return view; } 最后看一下调用
Activity需要实现item接口（OnPopItemClickListener）和底部按钮接口（OnBottomTextviewClickListener）
public void show(View view){ List pops = new ArrayList<>(); for (int i=0;i<5;i++){ PopBean pop = new PopBean("item"+i,0); pops.add(pop); } popWindow = new ListPopWindow(MainActivity.this,this,this,rl,pops,"cancel","title"); popWindow.showAtLocation(rl, Gravity.CENTER| Gravity.BOTTOM,0,0); } 以上就是本文的全部内容，希望能够对大家的学习有所帮助。
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