Activity的活动Menu和上下文Menu使用示例

步骤

1、重写Activity中的 

public void onCreateContextMenu(ContextMenu menu, View v,
   ContextMenu.ContextMenuInfo menuInfo){

         super.onCreateContextMenu(menu, v, menuInfo);

}

 创建Activity下方的menu菜单

2、创建上下文的Menu

 （1）重写

private ListView myListView;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
myListView = (ListView) findViewById(R.id.myListView);
....
registerForContextMenu(myListView);
}

用registerForContextMenu注册，当常按ListView中的某一项时会弹出Menu

（2）重写

//创建上下文Menu
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        menu.setHeaderTitle("Select to do item");
        menu.add(0, REMOVE_TODO, Menu.NONE, R.string.remove);
    }

实现点击后弹出的Menu的内容

（3）重写onOptionsItemSelected(MenuItem item)实现活动菜单选中后的操作

 

//活动菜单选中后的操作
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        super.onOptionsItemSelected(item);
        int index = myListView.getSelectedItemPosition();

        switch (item.getItemId()) {
        case (REMOVE_TODO):
            if (addingNew) {
                cancelAdd();
            } else {
                removeItem(index);
            }
            return true;
        case (ADD_NEW_TODO):
            addNewItem();
            return true;
        }
        return false;
    }

 

（4）重写public boolean onContextItemSelected(MenuItem item)实现上下文菜单选中后的操作

 

//上下文菜单选中后的操作
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        super.onContextItemSelected(item);
        switch (item.getItemId()) {
        case REMOVE_TODO:
            AdapterView.AdapterContextMenuInfo menuInfo;
            menuInfo = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
            int index = menuInfo.position;
            removeItem(index);
            return true;
        }
        return false;
    }

 

代码：/Files/cappuccino/TodoList.rar