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/**
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* 版权声明，说明该代码是MiCode开源社区的版权所有，并在Apache License 2.0下授权。
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*/
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package net.micode.notes.ui;
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// 导入所需的Android库和自定义包
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public class NotesListActivity extends Activity implements OnClickListener, OnItemLongClickListener {
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// 定义了一些查询操作的token，用于识别不同的后台查询操作
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private static final int FOLDER_NOTE_LIST_QUERY_TOKEN = 0;
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private static final int FOLDER_LIST_QUERY_TOKEN = 1;
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// 定义了菜单项的ID
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private static final int MENU_FOLDER_DELETE = 0;
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private static final int MENU_FOLDER_VIEW = 1;
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private static final int MENU_FOLDER_CHANGE_NAME = 2;
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// 定义了用户首次使用应用时显示的介绍信息的SharedPreferences键
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private static final String PREFERENCE_ADD_INTRODUCTION = "net.micode.notes.introduction";
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// 枚举，定义了不同的列表编辑状态
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private enum ListEditState {
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NOTE_LIST, SUB_FOLDER, CALL_RECORD_FOLDER
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};
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// 类变量定义
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private ListEditState mState;
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private BackgroundQueryHandler mBackgroundQueryHandler;
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private NotesListAdapter mNotesListAdapter;
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private ListView mNotesListView;
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private Button mAddNewNote;
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private boolean mDispatch;
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private int mOriginY;
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private int mDispatchY;
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private TextView mTitleBar;
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private long mCurrentFolderId;
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private ContentResolver mContentResolver;
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private ModeCallback mModeCallBack;
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private static final String TAG = "NotesListActivity";
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private static final int NOTES_LISTVIEW_SCROLL_RATE = 30;
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private NoteItemData mFocusNoteDataItem;
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private static final String NORMAL_SELECTION = NoteColumns.PARENT_ID + "=?";
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private static final String ROOT_FOLDER_SELECTION = "(" + NoteColumns.TYPE + "<>?"
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+ Notes.TYPE_SYSTEM + " AND " + NoteColumns.PARENT_ID + "=?)" + " OR ("
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+ NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER + " AND "
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+ NoteColumns.NOTES_COUNT + ">0)";
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private final static int REQUEST_CODE_OPEN_NODE = 102;
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private final static int REQUEST_CODE_NEW_NODE = 103;
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// onCreate方法，初始化Activity
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.note_list);
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initResources();
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// 用户首次使用应用时，插入介绍信息
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setAppInfoFromRawRes();
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}
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// onActivityResult方法，处理其他Activity返回的结果
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@Override
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protected void onActivityResult(int requestCode, int resultCode, Intent data) {
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// 省略了部分代码...
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}
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// setAppInfoFromRawRes方法，从raw资源中读取介绍信息并显示
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private void setAppInfoFromRawRes() {
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// 省略了部分代码...
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}
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// onStart方法，Activity启动时开始异步查询笔记列表
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@Override
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protected void onStart() {
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super.onStart();
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startAsyncNotesListQuery();
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}
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// initResources方法，初始化资源
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private void initResources() {
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// 省略了部分代码...
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}
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// ModeCallback内部类，实现了ListView的MultiChoiceModeListener和OnMenuItemClickListener接口
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private class ModeCallback implements ListView.MultiChoiceModeListener, OnMenuItemClickListener {
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// 省略了部分代码...
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}
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// NewNoteOnTouchListener内部类，处理“新建笔记”按钮的触摸事件
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private class NewNoteOnTouchListener implements OnTouchListener {
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// 省略了部分代码...
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};
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// startAsyncNotesListQuery方法，开始异步查询笔记列表
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private void startAsyncNotesListQuery() {
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// 省略了部分代码...
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}
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// BackgroundQueryHandler内部类，继承自AsyncQueryHandler，处理异步查询完成的回调
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private final class BackgroundQueryHandler extends AsyncQueryHandler {
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// 省略了部分代码...
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}
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// showFolderListMenu方法，显示文件夹列表菜单
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private void showFolderListMenu(Cursor cursor) {
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// 省略了部分代码...
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}
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// createNewNote方法，创建新笔记
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private void createNewNote() {
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// 省略了部分代码...
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}
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// batchDelete方法，批量删除笔记
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private void batchDelete() {
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// 省略了部分代码...
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}
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// deleteFolder方法，删除文件夹
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private void deleteFolder(long folderId) {
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// 省略了部分代码...
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}
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// openNode方法，打开笔记
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private void openNode(NoteItemData data) {
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// 省略了部分代码...
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}
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// openFolder方法，打开文件夹
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private void openFolder(NoteItemData data) {
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// 省略了部分代码...
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}
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// onClick方法，处理点击事件
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public void onClick(View v) {
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// 省略了部分代码...
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}
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// showSoftInput方法，显示软键盘
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private void showSoftInput() {
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// 省略了部分代码...
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}
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// hideSoftInput方法，隐藏软键盘
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private void hideSoftInput(View view) {
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// 省略了部分代码...
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}
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// showCreateOrModifyFolderDialog方法，显示创建或修改文件夹的对话框
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private void showCreateOrModifyFolderDialog(final boolean create) {
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// 省略了部分代码...
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}
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// onBackPressed方法，处理返回键事件
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@Override
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public void onBackPressed() {
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// 省略了部分代码...
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}
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// updateWidget方法，更新Widget
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private void updateWidget(int appWidgetId, int appWidgetType) {
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// 省略了部分代码...
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}
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// mFolderOnCreateContextMenuListener变量，用于创建文件夹的上下文菜单
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private final OnCreateContextMenuListener mFolderOnCreateContextMenuListener = new OnCreateContextMenuListener() {
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// 省略了部分代码...
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};
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// onContextMenuClosed方法，上下文菜单关闭时的回调
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@Override
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public void onContextMenuClosed(Menu menu) {
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// 省略了部分代码...
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}
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// onContextItemSelected方法，处理上下文菜单项的选中事件
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@Override
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public boolean onContextItemSelected(MenuItem item) {
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// 省略了部分代码...
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}
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// onPrepareOptionsMenu方法，准备选项菜单
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@Override
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public boolean onPrepareOptionsMenu(Menu menu) {
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// 省略了部分代码...
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}
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// onOptionsItemSelected方法，处理选项菜单项的点击事件
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@Override
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public boolean onOptionsItemSelected(MenuItem item) {
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// 省略了部分代码...
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}
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// onSearchRequested方法，处理搜索请求
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@Override
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public boolean onSearchRequested() {
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// 省略了部分代码...
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}
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// exportNoteToText方法，将笔记导出为文本
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private void exportNoteToText() {
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// 省略了部分代码...
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}
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// isSyncMode方法，判断是否是同步模式
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private boolean isSyncMode() {
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// 省略了部分代码...
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}
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// startPreferenceActivity方法，启动设置Activity
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private void startPreferenceActivity() {
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// 省略了部分代码...
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}
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// OnListItemClickListener内部类，实现了ListView的ItemClickListener接口
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private class OnListItemClickListener implements OnItemClickListener {
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// 省略了部分代码...
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}
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// startQueryDestinationFolders方法，开始查询目标文件夹
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private void startQueryDestinationFolders() {
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// 省略了部分代码...
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}
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// onItemLongClick方法，处理长按事件
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public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
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}
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} |
