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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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// FoldersListAdapter 是一个自定义的 CursorAdapter，用于显示文件夹列表。
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public class FoldersListAdapter extends CursorAdapter {
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// 定义查询数据库时需要的列。
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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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// 定义列索引常量。
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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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// FoldersListAdapter 的构造函数。
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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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}
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// 新建视图的方法，返回一个 FolderListItem 实例。
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@Override
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public View newView(Context context, Cursor cursor, ViewGroup parent) {
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return new FolderListItem(context);
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}
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// 绑定视图与数据的方法。
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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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}
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// 根据位置获取文件夹名称的方法。
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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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}
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// FolderListItem 是一个内部类，表示列表中的单个文件夹项。
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private class FolderListItem extends LinearLayout {
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private TextView mName; // 用于显示文件夹名称的 TextView。
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// FolderListItem 的构造函数。
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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);
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mName = (TextView) findViewById(R.id.tv_folder_name);
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}
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// 绑定文件夹名称的方法。
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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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} |
