From 9998ea2ad6a960af838f07ba9a41c7ecf6ee619a Mon Sep 17 00:00:00 2001
From: LZ <2929718516@qq.com>
Date: Wed, 25 Dec 2024 22:36:06 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=99=E6=AE=B5=E4=BB=A3=E7=A0=81=E5=AE=9A?=
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---
 DropdownMenu.java | 56 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 DropdownMenu.java

diff --git a/DropdownMenu.java b/DropdownMenu.java
new file mode 100644
index 0000000..afdac8e
--- /dev/null
+++ b/DropdownMenu.java
@@ -0,0 +1,56 @@
+/*
+ * 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.
+ */
+
+// 定义一个名为DropdownMenu的公开类
+public class DropdownMenu {
+    // 声明一个Button类型的私有成员变量mButton，用于存储下拉按钮
+    private Button mButton;
+    // 声明一个PopupMenu类型的私有成员变量mPopupMenu，用于存储弹出的菜单
+    private PopupMenu mPopupMenu;
+    // 声明一个Menu类型的私有成员变量mMenu，用于存储菜单项
+    private Menu mMenu;
+
+    // 构造方法，初始化DropdownMenu对象
+    public DropdownMenu(Context context, Button button, int menuId) {
+        mButton = button; // 将传入的Button对象赋值给mButton
+        mButton.setBackgroundResource(R.drawable.dropdown_icon); // 设置按钮的背景资源为dropdown_icon
+        mPopupMenu = new PopupMenu(context, mButton); // 创建一个新的PopupMenu对象，并将其与mButton绑定
+        mMenu = mPopupMenu.getMenu(); // 获取PopupMenu中的Menu对象
+        mPopupMenu.getMenuInflater().inflate(menuId, mMenu); // 使用menuId指定的XML布局文件来填充Menu对象
+        mButton.setOnClickListener(new OnClickListener() { // 为mButton设置点击监听器
+            public void onClick(View v) {
+                mPopupMenu.show(); // 当按钮被点击时，显示PopupMenu
+            }
+        });
+    }
+
+    // 设置PopupMenu的菜单项点击监听器
+    public void setOnDropdownMenuItemClickListener(OnMenuItemClickListener listener) {
+        if (mPopupMenu != null) {
+            mPopupMenu.setOnMenuItemClickListener(listener); // 为PopupMenu设置菜单项点击监听器
+        }
+    }
+
+    // 根据ID查找菜单项
+    public MenuItem findItem(int id) {
+        return mMenu.findItem(id); // 在Menu对象中查找具有指定ID的菜单项，并返回它
+    }
+
+    // 设置按钮的标题
+    public void setTitle(CharSequence title) {
+        mButton.setText(title); // 将传入的CharSequence对象设置为按钮的标题
+    }
+}
\ No newline at end of file