|
|
/*
|
|
|
* 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;
|
|
|
|
|
|
public class DropdownMenu {
|
|
|
private Button mButton; // 下拉菜单的触发按钮
|
|
|
private PopupMenu mPopupMenu; // 弹出式菜单
|
|
|
private Menu mMenu; // 菜单项集合
|
|
|
|
|
|
/**
|
|
|
* 构造函数，用于初始化DropdownMenu
|
|
|
*
|
|
|
* @param context 上下文对象
|
|
|
* @param button 与下拉菜单关联的按钮
|
|
|
* @param menuId 菜单资源文件的ID
|
|
|
*/
|
|
|
public DropdownMenu(Context context, Button button, int menuId) {
|
|
|
mButton = button;
|
|
|
mButton.setBackgroundResource(R.drawable.dropdown_icon); // 设置按钮背景为下拉图标
|
|
|
mPopupMenu = new PopupMenu(context, mButton); // 创建弹出式菜单，并与按钮关联
|
|
|
mMenu = mPopupMenu.getMenu(); // 获取菜单项集合
|
|
|
mPopupMenu.getMenuInflater().inflate(menuId, mMenu); // 从资源文件中加载菜单项到菜单集合
|
|
|
mButton.setOnClickListener(new OnClickListener() {
|
|
|
public void onClick(View v) {
|
|
|
mPopupMenu.show(); // 点击按钮时显示弹出式菜单
|
|
|
}
|
|
|
});
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 设置下拉菜单项点击监听器
|
|
|
*
|
|
|
* @param listener 下拉菜单项点击监听器
|
|
|
*/
|
|
|
public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
|
|
|
if (mPopupMenu != null) {
|
|
|
mPopupMenu.setOnMenuItemClickListener(listener); // 设置下拉菜单项点击监听器
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 根据菜单项ID查找菜单项
|
|
|
*
|
|
|
* @param id 要查找的菜单项的ID
|
|
|
* @return 查找到的菜单项，如果不存在则为null
|
|
|
*/
|
|
|
public MenuItem findItem(int id) {
|
|
|
return mMenu.findItem(id); // 根据ID在菜单项集合中查找菜单项
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 设置下拉菜单按钮的标题
|
|
|
*
|
|
|
* @param title 要设置的标题文本
|
|
|
*/
|
|
|
public void setTitle(CharSequence title) {
|
|
|
mButton.setText(title); // 设置下拉菜单按钮的标题文本
|
|
|
}
|
|
|
}
|
|
|
|
