From 054f8f9581b0946d2060b0a3e355ffd7521c4743 Mon Sep 17 00:00:00 2001
From: pz96pqh8i <3326392379@qq.com>
Date: Tue, 31 Dec 2024 02:06:33 +0800
Subject: [PATCH] ADD file via upload

---
 DropdownMenu.java | 138 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 DropdownMenu.java

diff --git a/DropdownMenu.java b/DropdownMenu.java
new file mode 100644
index 0000000..bd540f8
--- /dev/null
+++ b/DropdownMenu.java
@@ -0,0 +1,138 @@
+/*
+ * 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;
+    private PopupMenu mPopupMenu;
+    private Menu mMenu;
+
+    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();
+            }
+        });
+    }
+
+    public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
+        if (mPopupMenu != null) {
+            mPopupMenu.setOnMenuItemClickListener(listener);
+        }
+    }
+
+    public MenuItem findItem(int id) {
+        return mMenu.findItem(id);
+    }
+
+    public void setTitle(CharSequence title) {
+        mButton.setText(title);
+    }
+}
+
+
+
+
+
+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;
+
+// DropdownMenu类用于创建一个下拉菜单的功能组件，它将一个Button按钮与一个PopupMenu（弹出式菜单）相关联，
+// 点击按钮时会弹出对应的菜单，并且可以设置菜单选项的点击监听器、查找特定菜单项以及设置按钮显示的标题等操作。
+public class DropdownMenu {
+
+    // 用于存储关联的Button按钮对象，该按钮作为触发弹出菜单显示的交互元素
+    private Button mButton;
+    // 用于存储创建的PopupMenu（弹出式菜单）对象，承载具体的菜单内容和交互逻辑
+    private PopupMenu mPopupMenu;
+    // 用于存储PopupMenu对应的Menu对象，方便后续对菜单本身进行一些操作，比如查找菜单项等
+    private Menu mMenu;
+
+    // 构造函数，用于初始化DropdownMenu实例，传入上下文、要关联的Button按钮以及菜单资源的ID
+    public DropdownMenu(Context context, Button button, int menuId) {
+        // 将传入的Button按钮对象赋值给成员变量mButton，以便后续操作
+        mButton = button;
+
+        // 为Button按钮设置背景资源，这里使用了资源文件中定义的drawable资源（dropdown_icon）作为按钮的背景图片，
+        // 通常用于展示一个下拉箭头之类的图标，提示用户该按钮可以点击弹出菜单
+        mButton.setBackgroundResource(R.drawable.dropdown_icon);
+
+        // 创建一个PopupMenu实例，传入当前上下文和关联的Button按钮，使得弹出菜单能够在合适的位置（以按钮为锚点）显示出来
+        mPopupMenu = new PopupMenu(context, mButton);
+
+        // 获取PopupMenu对应的Menu对象，并赋值给成员变量mMenu，方便后续操作菜单内容
+        mMenu = mPopupMenu.getMenu();
+
+        // 使用MenuInflater（菜单填充器）将指定资源ID对应的菜单布局资源填充到创建的Menu对象中，
+        // 这样就构建好了具体的菜单结构，包含了各个菜单项等内容
+        mPopupMenu.getMenuInflater().inflate(menuId, mMenu);
+
+        // 为Button按钮设置点击事件监听器，当按钮被点击时触发相应逻辑
+        mButton.setOnClickListener(new OnClickListener() {
+            // 实现OnClickListener接口的点击事件处理方法，当按钮被点击时
+            public void onClick(View v) {
+                // 调用PopupMenu的show方法，显示弹出式菜单，使其展示在屏幕上供用户选择菜单项
+                mPopupMenu.show();
+            }
+        });
+    }
+
+    // 用于设置PopupMenu中菜单项的点击事件监听器，外部可以传入实现了OnMenuItemClickListener接口的实例，
+    // 来处理用户点击菜单项后的相应逻辑
+    public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
+        if (mPopupMenu!= null) {
+            // 如果PopupMenu对象不为空，为其设置菜单项点击事件监听器，将传入的监听器对象关联到PopupMenu上
+            mPopupMenu.setOnMenuItemClickListener(listener);
+        }
+    }
+
+    // 用于在已构建的Menu对象中查找指定ID的菜单项，返回对应的MenuItem对象，方便外部对特定菜单项进行操作，比如获取其属性、设置其状态等
+    public MenuItem findItem(int id) {
+        return mMenu.findItem(id);
+    }
+
+    // 用于设置Button按钮显示的标题文本内容，改变按钮上展示给用户的文字提示信息
+    public void setTitle(CharSequence title) {
+        mButton.setText(title);
+    }
+}