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/*
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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.database.Cursor;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.CursorAdapter;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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import net.micode.notes.R;
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.NoteColumns;
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//将cursor对象数据加载到界面的适配器
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public class FoldersListAdapter extends CursorAdapter {//将文件夹数据转换成视图
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public static final String [] PROJECTION = {
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NoteColumns.ID,
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NoteColumns.SNIPPET
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};
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public static final int ID_COLUMN = 0;
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public static final int NAME_COLUMN = 1;
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public FoldersListAdapter(Context context, Cursor c) {
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super(context, c);//调用父类构造方法，初始化上下文和游标
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// TODO Auto-generated constructor stub
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}
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@Override
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public View newView(Context context, Cursor cursor, ViewGroup parent) {//创建新的视图
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return new FolderListItem(context);//创建一个新的FolderListItem视图
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}
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@Override
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public void bindView(View view, Context context, Cursor cursor) {//绑定视图与数据
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if (view instanceof FolderListItem) {//判断视图是否为FolderListItem类型
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//根据文件夹类型动态显示不同的名称，当文件夹是文件夹时，显示移动到父文件夹
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//当文件夹是 普通文件夹时，显示其实际名称
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String folderName = (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
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.getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
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((FolderListItem) view).bind(folderName);//将文件夹名称绑定到FolderListItem视图
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}
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}
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public String getFolderName(Context context, int position) {//根据位置找到对应文件夹的名称
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Cursor cursor = (Cursor) getItem(position);
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return (cursor.getLong(ID_COLUMN) == Notes.ID_ROOT_FOLDER) ? context
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.getString(R.string.menu_move_parent_folder) : cursor.getString(NAME_COLUMN);
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}
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//布局管理器 之一，属于 ViewGroup 的子类，用于 将子View按照线性方向排列
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private class FolderListItem extends LinearLayout {//文件夹列表项视图
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private TextView mName;
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public FolderListItem(Context context) {
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super(context);
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inflate(context, R.layout.folder_list_item, this);//对 LayoutInflater.inflate()的简化
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//将R.layout.folder_list_item布局文件实例化并添加到当前视图（FolderListItem）中
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mName = (TextView) findViewById(R.id.tv_folder_name);//获取布局文件中的TextView控件
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}
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public void bind(String name) {
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mName.setText(name);//将文件夹名称设置到TextView中
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}
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}
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}
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