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");
}
});
}