详解Android中的Menu菜单键

<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingbottom="@dimen/activity_vertical_margin"
android:paddingleft="@dimen/activity_horizontal_margin"
android:paddingright="@dimen/activity_horizontal_margin"
android:paddingtop="@dimen/activity_vertical_margin"
tools:context=".menuactivity" >
<textview
android:id="@+id/menutext"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="第一种方法创建菜单"
android:textsize="sp" />
<textview
android:id="@+id/menutext"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="第二种方法创建菜单"
android:textsize="sp" />
<listview
android:id="@+id/menulist"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_margintop="dp" >
</listview>
</linearlayout> 

private listview list;
private textview lv;
string[] str = { "textview", "editview", "toast(消息框)" };
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_menu);
list = (listview) findviewbyid(r.id.menulist);
arrayadapter<string> arr = new arrayadapter<string>(this,
android.r.layout.simple_list_item_, str);
list.setadapter(arr);
list.setoncreatecontextmenulistener(new oncreatecontextmenulistener() {
@override
public void oncreatecontextmenu(contextmenu menu, view v,
contextmenuinfo menuinfo) {
menu.clear();
menu.clearheader();
menu.setheadericon((r.drawable.ic_launcher));
menu.setheadertitle("我是listview");
menu.add(, , , "删除");
menu.add(, , , "修改");
}
});
// 第一种方法
textview tv = (textview) findviewbyid(r.id.menutext);
this.registerforcontextmenu(tv);
// 第二种方法
lv = (textview) findviewbyid(r.id.menutext);
lv.setoncreatecontextmenulistener(new oncreatecontextmenulistener() {
@override
public void oncreatecontextmenu(contextmenu menu, view v,
contextmenuinfo menuinfo) {
menu.setheadertitle("长度-contextmenu");
menu.add(, , , "复制");
submenu sb = menu.addsubmenu("查找");
sb.add(, , , "按id查找");
sb.add(, , , "按名称查找");
}
});
}

private listview list;
private textview lv;
string[] str = { "textview", "editview", "toast(消息框)" };
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_menu);
list = (listview) findviewbyid(r.id.menulist);
arrayadapter<string> arr = new arrayadapter<string>(this,
android.r.layout.simple_list_item_, str);
list.setadapter(arr);
list.setoncreatecontextmenulistener(new oncreatecontextmenulistener() {
@override
public void oncreatecontextmenu(contextmenu menu, view v,
contextmenuinfo menuinfo) {
menu.clear();
menu.clearheader();
menu.setheadericon((r.drawable.ic_launcher));
menu.setheadertitle("我是listview");
menu.add(, , , "删除");
menu.add(, , , "修改");
}
});
// 第一种方法
textview tv = (textview) findviewbyid(r.id.menutext);
this.registerforcontextmenu(tv);
// 第二种方法
lv = (textview) findviewbyid(r.id.menutext);
lv.setoncreatecontextmenulistener(new oncreatecontextmenulistener() {
@override
public void oncreatecontextmenu(contextmenu menu, view v,
contextmenuinfo menuinfo) {
menu.setheadertitle("长度-contextmenu");
menu.add(, , , "复制");
submenu sb = menu.addsubmenu("查找");
sb.add(, , , "按id查找");
sb.add(, , , "按名称查找");
}
});
}