From 44ab3e7551a1caf639e9000730bd3a21dd3768b1 Mon Sep 17 00:00:00 2001
From: LZ <2929718516@qq.com>
Date: Thu, 26 Dec 2024 00:17:22 +0800
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---
 FoldersListAdapter.java | 93 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 FoldersListAdapter.java

diff --git a/FoldersListAdapter.java b/FoldersListAdapter.java
new file mode 100644
index 0000000..1ddec4b
--- /dev/null
+++ b/FoldersListAdapter.java
@@ -0,0 +1,93 @@
+/*
+ * 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FoldersListAdapter的类，该类继承自CursorAdapter
+package net.micode.notes.ui;
+
+import android.content.Context; // 导入Context类，用于访问应用环境信息
+import android.database.Cursor; // 导入Cursor类，用于数据库查询结果集的遍历
+import android.view.View; // 导入View类，用于UI界面上的元素
+import android.view.ViewGroup; // 导入ViewGroup类，用于容纳其他视图元素
+import android.widget.CursorAdapter; // 导入CursorAdapter类，用于将Cursor数据绑定到视图上
+import android.widget.LinearLayout; // 导入LinearLayout类，用于创建线性布局的视图
+import android.widget.TextView; // 导入TextView类，用于显示文本
+
+import net.micode.notes.R; // 导入R类，用于访问应用资源
+import net.micode.notes.data.Notes; // 导入Notes类，用于访问笔记数据
+import net.micode.notes.data.Notes.NoteColumns; // 导入NoteColumns内部类，用于访问笔记表的列名
+
+// FoldersListAdapter类的定义开始
+public class FoldersListAdapter extends CursorAdapter {
+    // 定义用于查询的列名数组
+    public static final String [] PROJECTION = {
+        NoteColumns.ID, // 笔记的ID
+        NoteColumns.SNIPPET // 笔记的摘要（这里用作文件夹名）
+    };
+
+    // 定义列索引常量
+    public static final int ID_COLUMN   = 0; // ID列的索引
+    public static final int NAME_COLUMN = 1; // 名称（摘要）列的索引
+
+    // FoldersListAdapter的构造函数
+    public FoldersListAdapter(Context context, Cursor c) {
+        super(context, c); // 调用父类的构造函数
+        // TODO Auto-generated constructor stub
+    }
+
+    // 当需要新的视图来显示数据时，调用此方法
+    @Override
+    public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        return new FolderListItem(context); // 创建一个新的FolderListItem视图
+    }
+
+    // 当需要将数据绑定到视图上时，调用此方法
+    @Override
+    public void bindView(View view, Context context, Cursor cursor) {
+        if (view instanceof FolderListItem) { // 如果视图是FolderListItem的实例
+            // 根据ID判断是否是根文件夹，并获取文件夹名
+            String folderName = (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
+                    .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
+            // 调用FolderListItem的bind方法，将文件夹名设置到视图上
+            ((FolderListItem) view).bind(folderName);
+        }
+    }
+
+    // 根据位置获取文件夹名的方法
+    public String getFolderName(Context context, int position) {
+        Cursor cursor = (Cursor) getItem(position); // 获取指定位置的Cursor
+        // 根据ID判断是否是根文件夹，并返回文件夹名
+        return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
+                .getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
+    }
+
+    // 定义一个内部类FolderListItem，继承自LinearLayout
+    private class FolderListItem extends LinearLayout {
+        private TextView mName; // 用于显示文件夹名的TextView
+
+        // FolderListItem的构造函数
+        public FolderListItem(Context context) {
+            super(context); // 调用父类的构造函数
+            inflate(context, R.layout.folder_list_item, this); // 使用指定的布局文件初始化视图
+            mName = (TextView) findViewById(R.id.tv_folder_name); // 获取TextView的实例
+        }
+
+        // 定义一个方法，用于设置文件夹名
+        public void bind(String name) {
+            mName.setText(name); // 将文件夹名设置到TextView上
+        }
+    }
+
+}
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