问题
I have a simple LinearLayout with ListView inside it (match_parent both for width and height). I need a context menu to show up upon a long touch on ANY place in the ListView. First, I called registerForContextMenu for the ListView. This makes the context menu show up ONLY if the touch is performed on a list item. Then I called registerForContextMenu for the LinearLayout as well, and set it attribute android:longClickable="true". This did not help.
So the question is how can one produce a context menu for a long touch below list items? For example, if we have 1 item in the list view, there is a lot of empty space below the item. Why does it not used for context menu invocation, provided that the list view fills entire parent according to the layout?
回答1:
I don't think that long clicking anywhere on the ListView to get a ContextMenu it's a normal behavior, one the user will expect(especially in your case, with the user clicking the empty space below the ListView and a ListView ContextMenu would appear).
Anyway, for your example, you can set your ListView height attribute to wrap_content(If I remember right, this is the recommended value) and then register the Contextmenu for the ListView and the parent LinearLayout(of course you'll have to provide the same code for both).
来源：https://stackoverflow.com/questions/10447676/context-menu-for-blank-space-in-a-listview