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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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public class FoldersListAdapter extends CursorAdapter {
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//CursorAdapter是Cursor和ListView的接口
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//FoldersListAdapter继承了CursorAdapter的类
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//主要作用是便签数据库和用户的交互
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//这里就是用folder（文件夹）的形式展现给用户
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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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};//调用数据库中便签的ID和片段
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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);
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// TODO Auto-generated constructor stub
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}//数据库操作
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@Override
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public View newView(Context context, Cursor cursor, ViewGroup parent) {
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//ViewGroup是容器
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return new FolderListItem(context);
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}//创建一个文件夹，对于各文件夹中子标签的初始化
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@Override
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public void bindView(View view, Context context, Cursor cursor) {
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if (view instanceof FolderListItem) {
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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);
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}
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}//将各个布局文件绑定起来
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public String getFolderName(Context context, int position) {
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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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}//根据数据库中标签的ID得到标签的各项内容
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private class FolderListItem extends LinearLayout {
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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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//操作数据库
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inflate(context, R.layout.folder_list_item, this);
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// //根据布局文件的名字等信息将其找出来
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mName = (TextView) findViewById(R.id.tv_folder_name);
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}
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public void bind(String name) {
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mName.setText(name);
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}
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}
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}
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