|
|
/*
|
|
|
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
|
|
|
*
|
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
* you may not use this file except in compliance with the License.
|
|
|
* You may obtain a copy of the License at
|
|
|
*
|
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
|
*
|
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
* See the License for the specific language governing permissions and
|
|
|
* limitations under the License.
|
|
|
*/
|
|
|
|
|
|
package net.micode.notes.ui;
|
|
|
|
|
|
import android.content.Context;
|
|
|
import android.view.Menu;
|
|
|
import android.view.MenuItem;
|
|
|
import android.view.View;
|
|
|
import android.view.View.OnClickListener;
|
|
|
import android.widget.Button;
|
|
|
import android.widget.PopupMenu;
|
|
|
import android.widget.PopupMenu.OnMenuItemClickListener;
|
|
|
|
|
|
import net.micode.notes.R;
|
|
|
|
|
|
/**
|
|
|
* 下拉菜单封装类
|
|
|
* <p>
|
|
|
* 该类封装了Android的PopupMenu，提供了一个简单的接口来创建和管理下拉菜单
|
|
|
* </p>
|
|
|
*/
|
|
|
public class DropdownMenu {
|
|
|
/**
|
|
|
* 触发下拉菜单的按钮
|
|
|
*/
|
|
|
private Button mButton;
|
|
|
|
|
|
/**
|
|
|
* 下拉菜单实例
|
|
|
*/
|
|
|
private PopupMenu mPopupMenu;
|
|
|
|
|
|
/**
|
|
|
* 菜单对象
|
|
|
*/
|
|
|
private Menu mMenu;
|
|
|
|
|
|
/**
|
|
|
* 构造函数，创建一个下拉菜单
|
|
|
* @param context 上下文对象
|
|
|
* @param button 触发下拉菜单的按钮
|
|
|
* @param menuId 菜单资源ID
|
|
|
*/
|
|
|
public DropdownMenu(Context context, Button button, int menuId) {
|
|
|
mButton = button;
|
|
|
mButton.setBackgroundResource(R.drawable.dropdown_icon);
|
|
|
mPopupMenu = new PopupMenu(context, mButton);
|
|
|
mMenu = mPopupMenu.getMenu();
|
|
|
mPopupMenu.getMenuInflater().inflate(menuId, mMenu);
|
|
|
mButton.setOnClickListener(new OnClickListener() {
|
|
|
public void onClick(View v) {
|
|
|
mPopupMenu.show();
|
|
|
}
|
|
|
});
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 设置下拉菜单项点击监听器
|
|
|
* @param listener 菜单项点击监听器
|
|
|
*/
|
|
|
public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
|
|
|
if (mPopupMenu != null) {
|
|
|
mPopupMenu.setOnMenuItemClickListener(listener);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 查找指定ID的菜单项
|
|
|
* @param id 菜单项ID
|
|
|
* @return 指定ID的菜单项，若不存在则返回null
|
|
|
*/
|
|
|
public MenuItem findItem(int id) {
|
|
|
return mMenu.findItem(id);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 设置下拉菜单按钮的标题
|
|
|
* @param title 按钮标题
|
|
|
*/
|
|
|
public void setTitle(CharSequence title) {
|
|
|
mButton.setText(title);
|
|
|
}
|
|
|
}
|
