|
|
|
|
|
|
|
|
/*这段代码定义了一个名为 FoldersListAdapter 的类，它是 CursorAdapter 的子类，
|
|
|
主要用于适配数据库查询结果（通过 Cursor 对象表示），并将数据绑定到列表项视图上。
|
|
|
此适配器特别适用于展示文件夹列表，每个文件夹项包含一个名称。*/
|
|
|
|
|
|
|
|
|
/*
|
|
|
* 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; /*定义了代码所在的包名*/
|
|
|
|
|
|
import android.content.Context;
|
|
|
import android.database.Cursor;
|
|
|
import android.view.View;
|
|
|
import android.view.ViewGroup;
|
|
|
import android.widget.CursorAdapter;
|
|
|
import android.widget.LinearLayout;
|
|
|
import android.widget.TextView; /*导入了所需的类和接口*/
|
|
|
|
|
|
import net.micode.notes.R;
|
|
|
import net.micode.notes.data.Notes;
|
|
|
import net.micode.notes.data.Notes.NoteColumns; /*导入了应用相关的资源和数据模型类*/
|
|
|
|
|
|
|
|
|
public class FoldersListAdapter extends CursorAdapter { /*定义了一个名为 FoldersListAdapter 的公共类，继承自 CursorAdapter*/
|
|
|
public static final String [] PROJECTION = {
|
|
|
NoteColumns.ID,
|
|
|
NoteColumns.SNIPPET
|
|
|
}; /*定义了数据库查询的列名数组*/
|
|
|
|
|
|
public static final int ID_COLUMN = 0;
|
|
|
public static final int NAME_COLUMN = 1; /*定义了查询结果中每列的索引*/
|
|
|
|
|
|
public FoldersListAdapter(Context context, Cursor c) {
|
|
|
super(context, c); /*构造函数，初始化父类 CursorAdapter*/
|
|
|
// TODO Auto-generated constructor stub
|
|
|
}
|
|
|
|
|
|
@Override
|
|
|
public View newView(Context context, Cursor cursor, ViewGroup parent) {
|
|
|
return new FolderListItem(context);
|
|
|
} /*覆盖 newView 方法，返回一个新的视图实例，这里返回的是一个 FolderListItem 实例*/
|
|
|
|
|
|
@Override
|
|
|
public void bindView(View view, Context context, Cursor cursor) {
|
|
|
if (view instanceof FolderListItem) {
|
|
|
String folderName = (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
|
|
|
.getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
|
|
|
((FolderListItem) view).bind(folderName);
|
|
|
}
|
|
|
} /*覆盖 bindView 方法，将数据绑定到视图上。如果是根目录，则使用特定字符串，否则从 Cursor 中获取名称*/
|
|
|
|
|
|
public String getFolderName(Context context, int position) {
|
|
|
Cursor cursor = (Cursor) getItem(position);
|
|
|
return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
|
|
|
.getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
|
|
|
} /*提供了一个方法用于根据位置获取文件夹名称*/
|
|
|
|
|
|
private class FolderListItem extends LinearLayout {
|
|
|
private TextView mName;
|
|
|
|
|
|
public FolderListItem(Context context) {
|
|
|
super(context);
|
|
|
inflate(context, R.layout.folder_list_item, this);
|
|
|
mName = (TextView) findViewById(R.id.tv_folder_name);
|
|
|
}
|
|
|
|
|
|
public void bind(String name) {
|
|
|
mName.setText(name);
|
|
|
}
|
|
|
} /*定义了一个内部类 FolderListItem，它是一个 LinearLayout 的子类，用于表示一个文件夹列表项，并提供了绑定数据的方法*/
|
|
|
|
|
|
}
|
