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63 lines
2.5 KiB
63 lines
2.5 KiB
/*
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* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package net.micode.notes.ui;
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import android.content.Context;
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import android.view.Menu;
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import android.view.MenuItem;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.widget.Button;
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import android.widget.PopupMenu;
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import android.widget.PopupMenu.OnMenuItemClickListener;
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import net.micode.notes.R;
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public class DropdownMenu {
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private Button mButton;// 按钮控件
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private PopupMenu mPopupMenu;// 弹出菜单控件
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private Menu mMenu; // 菜单控件
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public DropdownMenu(Context context, Button button, int menuId) { // 构造函数，传入上下文、按钮控件和菜单 ID
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mButton = button; // 初始化按钮控件
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mButton.setBackgroundResource(R.drawable.dropdown_icon); // 设置按钮控件背景为下拉菜单图标
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mPopupMenu = new PopupMenu(context, mButton);// 初始化弹出菜单控件，传入上下文和按钮控件
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mMenu = mPopupMenu.getMenu();// 初始化弹出菜单控件，传入上下文和按钮控件
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mPopupMenu.getMenuInflater().inflate(menuId, mMenu);// 从菜单资源 ID 中填充菜单控件
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mButton.setOnClickListener(new OnClickListener() {// 从菜单资源 ID 中填充菜单控件
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public void onClick(View v)// 点击事件处理
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{
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mPopupMenu.show();// 显示弹出菜单控件
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}
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});
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}
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public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
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if (mPopupMenu != null) {
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mPopupMenu.setOnMenuItemClickListener(listener);
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}
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} // 设置下拉菜单项的点击监听器
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public MenuItem findItem(int id) {
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return mMenu.findItem(id);
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}// 查找指定id的菜单项
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public void setTitle(CharSequence title) {
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mButton.setText(title);
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}// 设置按钮的标题文字
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}
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