Android Api demo系列（14） （App>Fragment>FragmentContextMenu）

App>Fragment>FragmentContextMenu

本文讲一个fragment的上下论文菜单

public static class ContextMenuFragment extends Fragment {        @Override        public View onCreateView(LayoutInflater inflater, ViewGroup container,                Bundle savedInstanceState) {            View root = inflater.inflate(R.layout.fragment_context_menu, container, false);            registerForContextMenu(root.findViewById(R.id.long_press));            return root;        }        @Override        public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {            super.onCreateContextMenu(menu, v, menuInfo);            menu.add(Menu.NONE, R.id.a_item, Menu.NONE, "Menu A");            menu.add(Menu.NONE, R.id.b_item, Menu.NONE, "Menu B");        }        @Override        public boolean onContextItemSelected(MenuItem item) {            switch (item.getItemId()) {                case R.id.a_item:                    Toast.makeText(getActivity(), "Item 1a was chosen", Toast.LENGTH_SHORT).show();                    return true;                case R.id.b_item:                    Toast.makeText(getActivity(), "Item 1b was chosen", Toast.LENGTH_SHORT).show();                    return true;            }            return super.onContextItemSelected(item);        }    }

fragment的registerForContextMenu(view),给一个button设置长安事件

onCreateContextMenu设置创建菜单，然后在res文件夹中创建一个menu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android">    <item android:id="@+id/invisible_item"        android:visible="false"        android:alphabeticShortcut="i"        android:title="Invisible item" />    <item android:id="@+id/a_item"        android:alphabeticShortcut="a"        android:title="Alvin" />    <item android:id="@+id/b_item"        android:alphabeticShortcut="b"        android:title="Bart" />

在oncontextItemSelected中处理点击的菜单事件。