diff --git a/src/net/micode/notes/data/NotesProvider.java b/src/net/micode/notes/data/NotesProvider.java deleted file mode 100644 index 0aaa191..0000000 --- a/src/net/micode/notes/data/NotesProvider.java +++ /dev/null @@ -1,340 +0,0 @@ -package net.micode.notes.data; - -import java.awt.*; - -/** - * NotesProvider 类用于管理笔记内容提供者，继承自 ContentProvider。 - * 它负责处理来自其他应用程序的对笔记数据库的访问请求 - */ -public class NotesProvider extends ContentProvider { - - /** - * UriMatcher 用于匹配传入的 URI，并根据不同的 URI 执行相应的操作。 - */ - private static final UriMatcher mMatcher; - - /** - * NotesDatabaseHelper 实例，用于与数据库进行交互。 - */ - private NotesDatabaseHelper mHelper; - - /** - * 日志标签，用于调试和日志记录。 - */ - private static final String TAG = "NotesProvider"; - - /** - * 定义不同类型的 URI 对应的代码值。 - */ - private static final int URI_NOTE = 1; - private static final int URI_NOTE_ITEM = 2; - private static final int URI_DATA = 3; - private static final int URI_DATA_ITEM = 4; - private static final int URI_SEARCH = 5; - private static final int URI_SEARCH_SUGGEST = 6; - - /** - * 静态代码块中初始化 UriMatcher，添加各种 URI 匹配规则。 - */ - static { - mMatcher = new UriMatcher(UriMatcher.NO_MATCH); - mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); - mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); - mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); - mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); - mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH); - mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST); - mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST); - } - - /** - * 搜索结果投影，定义了搜索结果返回的列及其别名。 - */ - private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + "," - + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," - + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," - + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + "," - + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + "," - + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," - + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; - - /** - * 搜索查询语句，用于从笔记表中检索包含特定关键字的笔记片段。 - */ - private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION - + " FROM " + TABLE.NOTE - + " WHERE " + NoteColumns.SNIPPET + " LIKE ?" - + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER - + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE; - - /** - * 在 ContentProvider 创建时调用，初始化 NotesDatabaseHelper 实例。 - * - * @return 返回 true 表示创建成功。 - */ - @Override - public boolean onCreate() { - mHelper = NotesDatabaseHelper.getInstance(getContext()); - return true; - } - - /** - * 处理查询请求，根据传入的 URI 返回相应的 Cursor。 - * - * @param uri 要查询的 URI。 - * @param projection 要查询的列。 - * @param selection 查询条件。 - * @param selectionArgs 查询条件参数。 - * @param sortOrder 排序顺序。 - * @return 返回查询结果的 Cursor。 - */ - @Override - public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, - String sortOrder) { - Cursor c = null; - SQLiteDatabase db = mHelper.getReadableDatabase(); - String id = null; - switch (mMatcher.match(uri)) { - case URI_NOTE: - c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, sortOrder); - break; - case URI_NOTE_ITEM: - id = uri.getPathSegments().get(1); - c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id + parseSelection(selection), - selectionArgs, null, null, sortOrder); - break; - case URI_DATA: - c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null, sortOrder); - break; - case URI_DATA_ITEM: - id = uri.getPathSegments().get(1); - c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id + parseSelection(selection), - selectionArgs, null, null, sortOrder); - break; - case URI_SEARCH: - case URI_SEARCH_SUGGEST: - if (sortOrder != null || projection != null) { - throw new IllegalArgumentException( - "do not specify sortOrder, selection, selectionArgs, or projection with this query"); - } - - String searchString = null; - if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) { - if (uri.getPathSegments().size() > 1) { - searchString = uri.getPathSegments().get(1); - } - } else { - searchString = uri.getQueryParameter("pattern"); - } - - if (TextUtils.isEmpty(searchString)) { - return null; - } - - try { - searchString = String.format("%%%s%%", searchString); - c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, new String[]{searchString}); - } catch (IllegalStateException ex) { - Log.e(TAG, "got exception: " + ex.toString()); - } - break; - default: - throw new IllegalArgumentException("Unknown URI " + uri); - } - if (c != null) { - c.setNotificationUri(getContext().getContentResolver(), uri); - } - return c; - } - - /** - * 插入新数据到指定 URI 对应的表中。 - * - * @param uri 要插入的 URI。 - * @param values 要插入的数据。 - * @return 返回插入后的新 URI。 - */ - @Override - public Uri insert(Uri uri, ContentValues values) { - SQLiteDatabase db = mHelper.getWritableDatabase(); - long dataId = 0, noteId = 0, insertedId = 0; - switch (mMatcher.match(uri)) { - case URI_NOTE: - insertedId = noteId = db.insert(TABLE.NOTE, null, values); - break; - case URI_DATA: - if (values.containsKey(DataColumns.NOTE_ID)) { - noteId = values.getAsLong(DataColumns.NOTE_ID); - } else { - Log.d(TAG, "Wrong data format without note id:" + values.toString()); - } - insertedId = dataId = db.insert(TABLE.DATA, null, values); - break; - default: - throw new IllegalArgumentException("Unknown URI " + uri); - } - // Notify the note uri - if (noteId > 0) { - getContext().getContentResolver().notifyChange( - ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null); - } - - // Notify the data uri - if (dataId > 0) { - getContext().getContentResolver().notifyChange( - ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null); - } - - return ContentUris.withAppendedId(uri, insertedId); - } - - /** - * 删除指定 URI 对应的数据。 - * - * @param uri 要删除的 URI。 - * @param selection 删除条件。 - * @param selectionArgs 删除条件参数。 - * @return 返回删除的行数。 - */ - @Override - public int delete(Uri uri, String selection, String[] selectionArgs) { - int count = 0; - String id = null; - SQLiteDatabase db = mHelper.getWritableDatabase(); - boolean deleteData = false; - switch (mMatcher.match(uri)) { - case URI_NOTE: - selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 "; - count = db.delete(TABLE.NOTE, selection, selectionArgs); - break; - case URI_NOTE_ITEM: - id = uri.getPathSegments().get(1); - /** - * ID 小于等于 0 的是系统文件夹，不允许删除。 - */ - long noteId = Long.valueOf(id); - if (noteId <= 0) { - break; - } - count = db.delete(TABLE.NOTE, NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); - break; - case URI_DATA: - count = db.delete(TABLE.DATA, selection, selectionArgs); - deleteData = true; - break; - case URI_DATA_ITEM: - id = uri.getPathSegments().get(1); - count = db.delete(TABLE.DATA, DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); - deleteData = true; - break; - default: - throw new IllegalArgumentException("Unknown URI " + uri); - } - if (count > 0) { - if (deleteData) { - getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); - } - getContext().getContentResolver().notifyChange(uri, null); - } - return count; - } - - /** - * 更新指定 URI 对应的数据。 - * - * @param uri 要更新的 URI。 - * @param values 更新的数据。 - * @param selection 更新条件。 - * @param selectionArgs 更新条件参数。 - * @return 返回更新的行数。 - */ - @Override - public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { - int count = 0; - String id = null; - SQLiteDatabase db = mHelper.getWritableDatabase(); - boolean updateData = false; - switch (mMatcher.match(uri)) { - case URI_NOTE: - increaseNoteVersion(-1, selection, selectionArgs); - count = db.update(TABLE.NOTE, values, selection, selectionArgs); - break; - case URI_NOTE_ITEM: - id = uri.getPathSegments().get(1); - increaseNoteVersion(Long.valueOf(id), selection, selectionArgs); - count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); - break; - case URI_DATA: - count = db.update(TABLE.DATA, values, selection, selectionArgs); - updateData = true; - break; - case URI_DATA_ITEM: - id = uri.getPathSegments().get(1); - count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); - updateData = true; - break; - default: - throw new IllegalArgumentException("Unknown URI " + uri); - } - - if (count > 0) { - if (updateData) { - getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); - } - getContext().getContentResolver().notifyChange(uri, null); - } - return count; - } - - /** - * 解析并格式化查询条件。 - * - * @param selection 查询条件。 - * @return 返回格式化后的查询条件。 - */ - private String parseSelection(String selection) { - return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); - } - - /** - * 增加笔记版本号。 - * - * @param id 笔记 ID。 - * @param selection 更新条件。 - * @param selectionArgs 更新条件参数。 - */ - private void increaseNoteVersion(long id, String selection, String[] selectionArgs) { - StringBuilder sql = new StringBuilder(120); - sql.append("UPDATE ").append(TABLE.NOTE).append(" SET ").append(NoteColumns.VERSION) - .append("=" + NoteColumns.VERSION + "+1 "); - - if (id > 0 || !TextUtils.isEmpty(selection)) { - sql.append(" WHERE "); - } - if (id > 0) { - sql.append(NoteColumns.ID + "=" + String.valueOf(id)); - } - if (!TextUtils.isEmpty(selection)) { - String selectString = id > 0 ? parseSelection(selection) : selection; - for (String args : selectionArgs) { - selectString = selectString.replaceFirst("\\?", args); - } - sql.append(selectString); - } - - mHelper.getWritableDatabase().execSQL(sql.toString()); - } - - /** - * 获取 MIME 类型，目前未实现。 - * - * @param uri 要获取 MIME 类型的 URI。 - * @return 返回 MIME 类型。 - */ - @Override - public String getType(Uri uri) { - // TODO Auto-generated method stub - return null; - } -} -```