Android的:如何找到位置从上下文菜单中点击
-
20-09-2019 - |
题
我有填充数据的列表视图。我设置为ListView的上下文菜单中使用以下代码:
list.setOnCreateContextMenuListener
(
new View.OnCreateContextMenuListener()
{
public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo)
{
AdapterContextMenuInfo mi =(AdapterContextMenuInfo) menuInfo;
menu.add(0, 0, 0, "Delete item");
}
}
);
我有以下方法覆盖,以控制去文本菜单菜单项中选择:
@Override
public boolean onContextItemSelected(MenuItem item)
{
switch(item.getItemId())
{
case 0:
ShowAlert("hello from delete item");
break;
default:
return super.onContextItemSelected(item);
}
return true;
}
在本overrided方法,我怎么能找到被点击列表视图的项目?
预先感谢。 最好的祝福。 何
解决方案
可以使用ContextMenu.ContextMenuInfo
。
类似的东西:
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
int index = info.position;
}
您还可以得到正在显示菜单中的确切View
:
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
int index = info.position;
View view = info.targetView;
}
其他提示
private static final int EDIT_ID = Menu.FIRST + 3;
private static final int DELETE_ID = Menu.FIRST + 4;
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenu.ContextMenuInfo menuInfo) {
menu.add(Menu.NONE, EDIT_ID, Menu.NONE, "Edit").setAlphabeticShortcut(
'e');
menu.add(Menu.NONE, DELETE_ID, Menu.NONE, "Delete")
.setAlphabeticShortcut('d');
}
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item
.getMenuInfo();
switch (item.getItemId()) {
case EDIT_ID:
edit(info.id);
return (true);
case DELETE_ID:
delete(info.id);
return (true);
}
return (super.onOptionsItemSelected(item));
}
OK,解决问题的信息空**** 使用静态成员和设定值从持有人的位置 保存在longclick方法成员的值,例如: -
public class CurrentPosition {
public static int Pos{ get; set; }
}
public bool OnLongClick(View v)
{
CurrentPosition.Pos = Position;
return false;
}
和在上下文菜单中选择项目使用:
public override bool OnContextItemSelected(IMenuItem item)
{
switch (item.ItemId)
{
case 0:
return true;
case 1:
Toast.MakeText(this,CurrentPosition.Pos.ToString(), ToastLength.Long).Show();
return true;
case 2:
Toast.MakeText(this, "Save", ToastLength.Long).Show();
return true;
}
return true;
}
}
C#代码
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