我的菜单有一个onclick功能,但我无法弄清楚我的子菜单的ID是什么,以便我可以告诉子菜单当用户点击它时该做什么.我使用下面的代码以编程方式创建了子菜单.所以,如果有人能够向我解释我如何知道子菜单的每个项目的id是什么我会非常感激.
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.mainmenu,menu);
SubMenu submenu = menu.addSubMenu(0,Menu.FirsT,Menu.NONE,"Preferences");
submenu.add(0,"Get Last 5 Packets");
submenu.add(0,"Get Last 10 Packets");
submenu.add(0,"Get Last 20 Packets");
inflater.inflate(R.menu.mainmenu,submenu);
return true;
}
@Override
public boolean onoptionsItemSelected(MenuItem item)
{
// Handle item selection
switch (item.getItemId())
{
case R.id.viewKML:
viewKML();
return true;
default:
return super.onoptionsItemSelected(item);
}
}
解决方法
当你添加
submenu.add(0,"Get Last 5 Packets");
add()方法的参数排列是Android Menu Add Method
public abstract MenuItem add (int groupId,int itemId,int order,CharSequence title)
itemId Unique item ID. Use NONE if you do not need a unique ID.
是菜单项的ID.它应该是独一无二的.就像你说15,20,21.这个id就像android：id =“@ id / 15”.当您要检查单击哪个项目时将使用
例如
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_activity_menu,menu);
SubMenu submenu = menu.addSubMenu(0,"Preferences");
submenu.add(0,10,"Get Last 5 Packets");
submenu.add(0,15,"Get Last 10 Packets");
submenu.add(0,"Get Last 20 Packets");
inflater.inflate(R.menu.main_activity_menu,submenu);
return true;
}
@Override
public boolean onoptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case 10:
Toast.makeText(LoginPageActivity.this,"Now "+item.getItemId(),Toast.LENGTH_SHORT).show();
return true;
case 15:
Toast.makeText(LoginPageActivity.this,"Now = "+item.getItemId(),Toast.LENGTH_SHORT).show();
return true;
case 20:
Toast.makeText(LoginPageActivity.this,"Now == "+item.getItemId(),Toast.LENGTH_SHORT).show();
return true;
default:
return super.onoptionsItemSelected(item);
}
}