protected virtual void MoreClick(View view)
{
List <PopupMenuItem> menuList = new List <PopupMenuItem> {
new PopupMenuItem
{
ItemImage = Resource.Drawable.expleror_folder,
ItemText = "System",
Click = () => Adapter.SetData(Environment.RootDirectory.Path),
},
new PopupMenuItem
{
ItemImage = Resource.Drawable.expleror_folder,
ItemText = "存储器",
Click = () => Adapter.SetData(Environment.ExternalStorageDirectory.Path),
},
};
var setting = new PopupMenuSetting {
};
PopMenu.PopupMenu.ShowPopupWindows(this, view, menuList, setting);
}
/// <summary>
/// 显示popupWindow弹出框
/// </summary>
public static void ShowPopupWindows(Context context, View spinnerview, List <PopupMenuItem> mArrayList, PopupMenuSetting setting)
{
if (popupWindow != null)
{
if (popupWindow.IsShowing)
{
popupWindow.Dismiss();
popupWindow = null;
}
}
//一个自定义的布局，作为显示的内容
View popupWindowView = LayoutInflater.From(context).Inflate(Resource.Layout.PopupMenuLayout, null);
/// <summary>
/// 在初始化contentView的时候，强制绘制contentView，并且马上初始化contentView的尺寸。
/// 另外一个点需要注意：popwindow_layout.xml的根Layout必须为LinearLayout；如果为RelativeLayout的话，会导致程序崩溃。
/// </summary>
popupWindowView.Measure((int)MeasureSpecMode.Unspecified, (int)MeasureSpecMode.Unspecified);
//用于获取单个列表项的高度【用于计算大于n个列表项的时候，列表的总高度值n * listitemView.getMeasuredHeight()】
View listitemView = LayoutInflater.From(context).Inflate(Resource.Layout.PopupMenuItem, null);
listitemView.Measure((int)MeasureSpecMode.Unspecified, (int)MeasureSpecMode.Unspecified);
//列表
RecyclerView mListView = (RecyclerView)popupWindowView.FindViewById(Resource.Id.menu_list);
//设置布局管理器
LinearLayoutManager linerLayoutManager = new LinearLayoutManager(context);
mListView.SetLayoutManager(linerLayoutManager);
PopupWindowMenuListAdapter mPopupMenuAdapter = new PopupWindowMenuListAdapter(context, mArrayList);
mListView.SetAdapter(mPopupMenuAdapter);
mPopupMenuAdapter.SetOnItemClickLitener(new AnonymousItemClickLitener(position => mArrayList[position].Click()));
//实例化PopupWindow【宽度为自身宽度，高度为自身高度】
//popupWindow = new PopupWindow(popupWindowView, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
//设置当大于6个列表项的时候，设置列表总高度值为6个列表项的高度值
if (mArrayList.Count <= 6)
{
popupWindow = new PopupWindow(popupWindowView, ViewGroup.LayoutParams.WrapContent, ViewGroup.LayoutParams.WrapContent);
//popupWindow = new PopupWindow(popupWindowView, spinnerview.getMeasuredWidth(), ViewGroup.LayoutParams.WRAP_CONTENT);//spinnerview.getMeasuredWidth()用于设置跟依附的控件的宽度相等
}
else
{
popupWindow = new PopupWindow(popupWindowView, ViewGroup.LayoutParams.WrapContent, listitemView.MeasuredHeight * 6);
//popupWindow = new PopupWindow(popupWindowView, spinnerview.getMeasuredWidth(), listitemView.getMeasuredHeight() * 6);//spinnerview.getMeasuredWidth()用于设置跟依附的控件的宽度相等
}
popupWindow.Touchable = true; //设置可以触摸
popupWindow.Focusable = true; //代表可以允许获取焦点的，如果有输入框的话，可以聚焦
//监听popWindow的隐藏时执行的操作--这个不错
popupWindow.SetOnDismissListener(new AnonymousOnDismissListener());
//下面两个参数是实现点击点击外面隐藏popupwindow的
//这里设置显示PopuWindow之后在外面点击是否有效。如果为false的话，那么点击PopuWindow外面并不会关闭PopuWindow。当然这里很明显只能在Touchable下才能使用。不设置此项则下面的捕获window外touch事件就无法触发。
popupWindow.OutsideTouchable = true;
// 如果不设置PopupWindow的背景，无论是点击外部区域还是Back键都无法dismiss弹框
// 我觉得这里是API的一个bug
//方式一
ColorDrawable dw = new ColorDrawable(new Color(0x00000000)); //设置背景为透明
popupWindow.SetBackgroundDrawable(dw);
//int xPos = - popupWindow.getWidth() / 2 + view.getWidth() / 2;//X轴的偏移值:xoff表示x轴的偏移，正值表示向右，负值表示向左；
int xPos = 0; //X轴的偏移值:xoff表示x轴的偏移，正值表示向左，负值表示向右；
int yPos = 0; //Y轴的偏移值相对某个控件的位置，有偏移;yoff表示相对y轴的偏移，正值是向下，负值是向上；
//=======展现在控件的下方
//相对于当前view进行位置设置
popupWindow.ShowAsDropDown(spinnerview, xPos, yPos);
}
