|
|
/*
|
|
|
* Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net)
|
|
|
*
|
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
* you may not use this file except in compliance with the License.
|
|
|
* You may obtain a copy of the License at
|
|
|
*
|
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
|
*
|
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
* See the License for the specific language governing permissions and
|
|
|
* limitations under the License.
|
|
|
*/
|
|
|
|
|
|
package net.micode.notes.data;
|
|
|
|
|
|
|
|
|
import android.app.SearchManager;
|
|
|
import android.content.ContentProvider;
|
|
|
import android.content.ContentUris;
|
|
|
import android.content.ContentValues;
|
|
|
import android.content.Intent;
|
|
|
import android.content.UriMatcher;
|
|
|
import android.database.Cursor;
|
|
|
import android.database.sqlite.SQLiteDatabase;
|
|
|
import android.net.Uri;
|
|
|
import android.text.TextUtils;
|
|
|
import android.util.Log;
|
|
|
|
|
|
import net.micode.notes.R;
|
|
|
import net.micode.notes.data.Notes.DataColumns;
|
|
|
import net.micode.notes.data.Notes.NoteColumns;
|
|
|
import net.micode.notes.data.NotesDatabaseHelper.TABLE;
|
|
|
|
|
|
|
|
|
public class NotesProvider extends ContentProvider {
|
|
|
// URI匹配器，用于匹配不同的URI请求
|
|
|
private static final UriMatcher mMatcher;
|
|
|
|
|
|
// 数据库帮助类实例
|
|
|
private NotesDatabaseHelper mHelper;
|
|
|
|
|
|
// 日志标签
|
|
|
private static final String TAG = "NotesProvider";
|
|
|
|
|
|
// URI匹配常量定义
|
|
|
private static final int URI_NOTE = 1; // 匹配笔记集合URI
|
|
|
private static final int URI_NOTE_ITEM = 2; // 匹配单个笔记URI
|
|
|
private static final int URI_DATA = 3; // 匹配数据集合URI
|
|
|
private static final int URI_DATA_ITEM = 4; // 匹配单个数据URI
|
|
|
private static final int URI_SEARCH = 5; // 匹配搜索URI
|
|
|
private static final int URI_SEARCH_SUGGEST = 6; // 匹配搜索建议URI
|
|
|
|
|
|
// 静态初始化块，配置URI匹配器
|
|
|
static {
|
|
|
mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
|
|
|
mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); // content://micode_notes/note
|
|
|
mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); // content://micode_notes/note/1
|
|
|
mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); // content://micode_notes/data
|
|
|
mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); // content://micode_notes/data/1
|
|
|
mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH); // content://micode_notes/search
|
|
|
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST); // 搜索建议URI
|
|
|
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST); // 带查询的搜索建议URI
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 搜索结果的投影(列)定义
|
|
|
* x'0A'代表SQLite中的换行符'\n'。对于搜索结果中的标题和内容，
|
|
|
* 我们会去除'\n'和空格以显示更多信息。
|
|
|
*/
|
|
|
private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
|
|
|
+ NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," // 建议项的额外数据
|
|
|
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," // 建议文本行1
|
|
|
+ "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + "," // 建议文本行2
|
|
|
+ R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + "," // 建议图标
|
|
|
+ "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," // 点击建议项时的动作
|
|
|
+ "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; // 点击建议项时的数据
|
|
|
|
|
|
// 笔记片段搜索查询SQL
|
|
|
private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION
|
|
|
+ " FROM " + TABLE.NOTE // 从笔记表查询
|
|
|
+ " WHERE " + NoteColumns.SNIPPET + " LIKE ?" // 片段内容匹配
|
|
|
+ " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER // 不在回收站中
|
|
|
+ " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE; // 类型为普通笔记
|
|
|
|
|
|
@Override
|
|
|
public boolean onCreate() {
|
|
|
// 初始化数据库帮助类
|
|
|
mHelper = NotesDatabaseHelper.getInstance(getContext());
|
|
|
return true;
|
|
|
}
|
|
|
|
|
|
@Override
|
|
|
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
|
|
|
String sortOrder) {
|
|
|
Cursor c = null;
|
|
|
SQLiteDatabase db = mHelper.getReadableDatabase();
|
|
|
String id = null;
|
|
|
|
|
|
// 根据URI匹配不同类型请求
|
|
|
switch (mMatcher.match(uri)) {
|
|
|
case URI_NOTE:
|
|
|
// 查询笔记表所有记录
|
|
|
c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
|
|
|
sortOrder);
|
|
|
break;
|
|
|
case URI_NOTE_ITEM:
|
|
|
// 查询单个笔记记录
|
|
|
id = uri.getPathSegments().get(1);
|
|
|
c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
|
|
|
+ parseSelection(selection), selectionArgs, null, null, sortOrder);
|
|
|
break;
|
|
|
case URI_DATA:
|
|
|
// 查询数据表所有记录
|
|
|
c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
|
|
|
sortOrder);
|
|
|
break;
|
|
|
case URI_DATA_ITEM:
|
|
|
// 查询单个数据记录
|
|
|
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:
|
|
|
// 处理搜索请求
|
|
|
if (sortOrder != null || projection != null) {
|
|
|
throw new IllegalArgumentException(
|
|
|
"do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
|
|
|
}
|
|
|
|
|
|
String searchString = null;
|
|
|
// 获取搜索关键字
|
|
|
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 {
|
|
|
// 格式化搜索字符串(添加通配符)
|
|
|
searchString = String.format("%%%s%%", searchString);
|
|
|
// 执行原始SQL查询
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
// 设置内容变化通知URI
|
|
|
if (c != null) {
|
|
|
c.setNotificationUri(getContext().getContentResolver(), uri);
|
|
|
}
|
|
|
return c;
|
|
|
}
|
|
|
|
|
|
@Override
|
|
|
public Uri insert(Uri uri, ContentValues values) {
|
|
|
SQLiteDatabase db = mHelper.getWritableDatabase();
|
|
|
long dataId = 0, noteId = 0, insertedId = 0;
|
|
|
|
|
|
// 根据URI类型处理插入请求
|
|
|
switch (mMatcher.match(uri)) {
|
|
|
case URI_NOTE:
|
|
|
// 插入笔记表
|
|
|
insertedId = noteId = db.insert(TABLE.NOTE, null, values);
|
|
|
break;
|
|
|
case URI_DATA:
|
|
|
// 插入数据表
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
// 通知笔记URI数据变化
|
|
|
if (noteId > 0) {
|
|
|
getContext().getContentResolver().notifyChange(
|
|
|
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
|
|
|
}
|
|
|
|
|
|
// 通知数据URI数据变化
|
|
|
if (dataId > 0) {
|
|
|
getContext().getContentResolver().notifyChange(
|
|
|
ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
|
|
|
}
|
|
|
|
|
|
// 返回新插入项的URI
|
|
|
return ContentUris.withAppendedId(uri, insertedId);
|
|
|
}
|
|
|
|
|
|
@Override
|
|
|
public int delete(Uri uri, String selection, String[] selectionArgs) {
|
|
|
int count = 0;
|
|
|
String id = null;
|
|
|
SQLiteDatabase db = mHelper.getWritableDatabase();
|
|
|
boolean deleteData = false;
|
|
|
|
|
|
// 根据URI类型处理删除请求
|
|
|
switch (mMatcher.match(uri)) {
|
|
|
case URI_NOTE:
|
|
|
// 删除笔记表记录(只删除ID大于0的笔记)
|
|
|
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
|
|
|
count = db.delete(TABLE.NOTE, selection, selectionArgs);
|
|
|
break;
|
|
|
case URI_NOTE_ITEM:
|
|
|
// 删除单个笔记记录
|
|
|
id = uri.getPathSegments().get(1);
|
|
|
/**
|
|
|
* ID小于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:
|
|
|
// 删除数据表记录
|
|
|
count = db.delete(TABLE.DATA, selection, selectionArgs);
|
|
|
deleteData = true;
|
|
|
break;
|
|
|
case URI_DATA_ITEM:
|
|
|
// 删除单个数据记录
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
// 通知数据变化
|
|
|
if (count > 0) {
|
|
|
if (deleteData) {
|
|
|
// 如果删除的是数据，需要通知笔记URI变化
|
|
|
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
|
|
|
}
|
|
|
// 通知当前URI变化
|
|
|
getContext().getContentResolver().notifyChange(uri, null);
|
|
|
}
|
|
|
return count;
|
|
|
}
|
|
|
|
|
|
@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;
|
|
|
|
|
|
// 根据URI类型处理更新请求
|
|
|
switch (mMatcher.match(uri)) {
|
|
|
case URI_NOTE:
|
|
|
// 更新笔记表记录前增加版本号
|
|
|
increaseNoteVersion(-1, selection, selectionArgs);
|
|
|
count = db.update(TABLE.NOTE, values, selection, selectionArgs);
|
|
|
break;
|
|
|
case URI_NOTE_ITEM:
|
|
|
// 更新单个笔记记录前增加版本号
|
|
|
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:
|
|
|
// 更新数据表记录
|
|
|
count = db.update(TABLE.DATA, values, selection, selectionArgs);
|
|
|
updateData = true;
|
|
|
break;
|
|
|
case URI_DATA_ITEM:
|
|
|
// 更新单个数据记录
|
|
|
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);
|
|
|
}
|
|
|
|
|
|
// 通知数据变化
|
|
|
if (count > 0) {
|
|
|
if (updateData) {
|
|
|
// 如果更新的是数据，需要通知笔记URI变化
|
|
|
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
|
|
|
}
|
|
|
// 通知当前URI变化
|
|
|
getContext().getContentResolver().notifyChange(uri, null);
|
|
|
}
|
|
|
return count;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 解析选择条件，将普通选择条件转换为AND连接的条件
|
|
|
* @param selection 原始选择条件
|
|
|
* @return 格式化后的选择条件
|
|
|
*/
|
|
|
private String parseSelection(String selection) {
|
|
|
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 增加笔记版本号
|
|
|
* @param id 笔记ID，如果<=0则忽略
|
|
|
* @param selection 选择条件
|
|
|
* @param selectionArgs 选择参数
|
|
|
*/
|
|
|
private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
|
|
|
StringBuilder sql = new StringBuilder(120);
|
|
|
sql.append("UPDATE ");
|
|
|
sql.append(TABLE.NOTE);
|
|
|
sql.append(" SET ");
|
|
|
sql.append(NoteColumns.VERSION);
|
|
|
sql.append("=" + NoteColumns.VERSION + "+1 ");
|
|
|
|
|
|
// 添加WHERE条件
|
|
|
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;
|
|
|
// 替换参数占位符
|
|
|
for (String args : selectionArgs) {
|
|
|
selectString = selectString.replaceFirst("\\?", args);
|
|
|
}
|
|
|
sql.append(selectString);
|
|
|
}
|
|
|
|
|
|
// 执行SQL
|
|
|
mHelper.getWritableDatabase().execSQL(sql.toString());
|
|
|
}
|
|
|
|
|
|
@Override
|
|
|
public String getType(Uri uri) {
|
|
|
// TODO: 根据需要实现获取MIME类型
|
|
|
return null;
|
|
|
}
|
|
|
} |
