Android 自定义弹出菜单和对话框功能实例代码

protected void showPopWindow(View view, final int pos){  WindowManager wm= (WindowManager) myContext.getSystemService(Context.WINDOW_SERVICE);  int width=wm.getDefaultDisplay().getWidth();  LayoutInflater layoutInflater=(LayoutInflater)myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  View popView=layoutInflater.inflate(R.layout.layout_shoucang_popupwindow,null);  //加载弹出菜单的布局文件  final ListView lvpop= (ListView) popView.findViewById(R.id.lvShouCangPop);  List<String> strData=new ArrayList<>();  strData.add("删除");  strData.add("分享");  popView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);  popupWindow=new PopupWindow(popView,3*width/10, ViewGroup.LayoutParams.WRAP_CONTENT); //设置popupWindow 的大小  lvpop.setAdapter(new AdapterShouCangDeletePop(myContext,strData));  lvpop.setOnItemClickListener(new AdapterView.OnItemClickListener() {   @Override   public void onItemClick(AdapterView<?> parent, View view, int position, long id) {    if(position==0){     //点击删除按钮的逻辑//     ToastUtil.toastButtom(myContext,"点击删除按钮");//     datas.remove(pos); //remove掉这行数据     toActivityPos=pos;//     notifyDataSetChanged();     sendDeleteBoardCast(); //发送一条广播     popupWindow.dismiss();    }else if(position ==1){     //点击分享的逻辑     String title=datas.get(position).ucDesc;     String photoUrl=datas.get(position).ucIcon;     String contentUrl=datas.get(position).ucUrl;     DialogShouCangShare dialogShouCangShare=new DialogShouCangShare(myContext,title,photoUrl,contentUrl); //弹出分享对话框     dialogShouCangShare.show();     popupWindow.dismiss();    }   }  });  int[] location=new int[2];  view.getLocationOnScreen(location);  popupWindow.setFocusable(true);  popupWindow.setBackgroundDrawable(new BitmapDrawable());//最好加上这一句，因为他可以取消显示这个弹出菜单，不加的话，弹出菜单很难消失  //下方：popupWindow.showAsDropDown(v);  //popupWindow.showAtLocation(v, Gravity.NO_GRAVITY, location[0]+v.getWidth(), location[1]); 显示在右边  //popupWindow显示在左边  popupWindow.showAtLocation(view, Gravity.NO_GRAVITY    , location[0]-popupWindow.getWidth(),location[1]); //这里的view是传进来的view，比如点击事件中的view，就把它传进来，popupwindow的位置可以自行调整 }