pwiz98tyo
/
qw-notes
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update NotesProvider.java

Browse Source
main
pwiz98tyo 2 months ago
parent d4425b7fc7
commit 1af54fe5ac
1 changed files with 91 additions and 56 deletions
Show Stats Download Patch File Download Diff File

147
java/net/micode/notes/data/NotesProvider.java
Unescape View File

@ -16,7 +16,6 @@
package net.micode.notes.data;
import android.app.SearchManager;
import android.content.ContentProvider;
import android.content.ContentUris;
@ -34,37 +33,32 @@ 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 {
private static final UriMatcher mMatcher;
private NotesDatabaseHelper mHelper;
private static final String TAG = "NotesProvider";
private static final UriMatcher mMatcher; // URI匹配器，用于识别不同的URI
private NotesDatabaseHelper mHelper; // 数据库帮助类实例
private static final String TAG = "NotesProvider"; // 日志标签
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;
// URI匹配常量
private static final int URI_NOTE = 1; // 笔记集合URI
private static final int URI_NOTE_ITEM = 2; // 单个笔记URI
private static final int URI_DATA = 3; // 数据集合URI
private static final int URI_DATA_ITEM = 4; // 单个数据URI
private static final int URI_SEARCH = 5; // 搜索URI
private static final int URI_SEARCH_SUGGEST = 6; // 搜索建议URI
// 静态初始化块，设置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);
mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); // 匹配所有笔记
mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); // 匹配单个笔记
mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); // 匹配所有数据
mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); // 匹配单个数据
mMatcher.addURI(Notes.AUTHORITY, "search", URI_SEARCH); // 匹配搜索
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY, URI_SEARCH_SUGGEST); // 匹配搜索建议
mMatcher.addURI(Notes.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*", URI_SEARCH_SUGGEST); // 匹配带参数的搜索建议
}
/**
* x'0A' represents the '\n' character in sqlite. For title and content in the search result,
* we will trim '\n' and white space in order to show more information.
*/
// 搜索投影和查询SQL
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 + ","
@ -79,42 +73,44 @@ public class NotesProvider extends ContentProvider {
+ " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER
+ " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE;
// 初始化提供者
@Override
public boolean onCreate() {
mHelper = NotesDatabaseHelper.getInstance(getContext());
return true;
}
// 查询数据
@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匹配类型执行不同的查询
switch (mMatcher.match(uri)) {
case URI_NOTE:
c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
sortOrder);
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);
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);
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);
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");
throw new IllegalArgumentException("不支持指定排序或投影");
}
String searchString = null;
@ -132,25 +128,29 @@ public class NotesProvider extends ContentProvider {
try {
searchString = String.format("%%%s%%", searchString);
c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
new String[] { searchString });
c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, new String[] { searchString });
} catch (IllegalStateException ex) {
Log.e(TAG, "got exception: " + ex.toString());
Log.e(TAG, "查询异常: " + ex.toString());
}
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
throw new IllegalArgumentException("未知URI: " + uri);
}
// 设置内容观察者通知
if (c != null) {
c.setNotificationUri(getContext().getContentResolver(), uri);
}
return c;
}
// 插入数据
@Override
public Uri insert(Uri uri, ContentValues values) {
SQLiteDatabase db = mHelper.getWritableDatabase();
long dataId = 0, noteId = 0, insertedId = 0;
// 根据URI匹配类型执行不同的插入操作
switch (mMatcher.match(uri)) {
case URI_NOTE:
insertedId = noteId = db.insert(TABLE.NOTE, null, values);
@ -159,20 +159,20 @@ public class NotesProvider extends ContentProvider {
if (values.containsKey(DataColumns.NOTE_ID)) {
noteId = values.getAsLong(DataColumns.NOTE_ID);
} else {
Log.d(TAG, "Wrong data format without note id:" + values.toString());
Log.d(TAG, "数据格式错误，缺少笔记ID: " + values.toString());
}
insertedId = dataId = db.insert(TABLE.DATA, null, values);
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
throw new IllegalArgumentException("未知URI: " + uri);
}
// Notify the note uri
// 通知数据变化
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);
@ -181,12 +181,15 @@ public class NotesProvider extends ContentProvider {
return ContentUris.withAppendedId(uri, insertedId);
}
// 删除数据
@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匹配类型执行不同的删除操作
switch (mMatcher.match(uri)) {
case URI_NOTE:
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
@ -194,10 +197,7 @@ public class NotesProvider extends ContentProvider {
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
/**
* ID that smaller than 0 is system folder which is not allowed to
* trash
*/
// 系统文件夹不允许删除
long noteId = Long.valueOf(id);
if (noteId <= 0) {
break;
@ -216,8 +216,10 @@ public class NotesProvider extends ContentProvider {
deleteData = true;
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
throw new IllegalArgumentException("未知URI: " + uri);
}
// 通知数据变化
if (count > 0) {
if (deleteData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
@ -227,12 +229,15 @@ public class NotesProvider extends ContentProvider {
return count;
}
// 更新数据
@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匹配类型执行不同的更新操作
switch (mMatcher.match(uri)) {
case URI_NOTE:
increaseNoteVersion(-1, selection, selectionArgs);
@ -241,8 +246,8 @@ public class NotesProvider extends ContentProvider {
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);
count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id + parseSelection(selection),
selectionArgs);
break;
case URI_DATA:
count = db.update(TABLE.DATA, values, selection, selectionArgs);
@ -250,14 +255,15 @@ public class NotesProvider extends ContentProvider {
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id + parseSelection(selection),
selectionArgs);
updateData = true;
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
throw new IllegalArgumentException("未知URI: " + uri);
}
// 通知数据变化
if (count > 0) {
if (updateData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
@ -267,10 +273,12 @@ public class NotesProvider extends ContentProvider {
return count;
}
// 解析查询条件
private String parseSelection(String selection) {
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
}
// 增加笔记版本号
private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
StringBuilder sql = new StringBuilder(120);
sql.append("UPDATE ");
@ -296,10 +304,37 @@ public class NotesProvider extends ContentProvider {
mHelper.getWritableDatabase().execSQL(sql.toString());
}
// 获取内容类型
@Override
public String getType(Uri uri) {
// TODO Auto-generated method stub
return null;
switch (mMatcher.match(uri)) {
case URI_NOTE:
// 返回笔记集合的MIME类型
return Notes.TextNote.CONTENT_TYPE;
case URI_NOTE_ITEM:
// 返回单个笔记的MIME类型
return Notes.TextNote.CONTENT_ITEM_TYPE;
case URI_DATA:
// 返回数据集合的MIME类型
return Notes.Data.CONTENT_TYPE;
case URI_DATA_ITEM:
// 返回单个数据的MIME类型
return Notes.Data.CONTENT_ITEM_TYPE;
case URI_SEARCH:
// 返回搜索结果的MIME类型
return Notes.TextNote.CONTENT_TYPE;
case URI_SEARCH_SUGGEST:
// 返回搜索建议的MIME类型
return SearchManager.SUGGEST_MIME_TYPE;
default:
throw new IllegalArgumentException("Unknown URI: " + uri);
}
}
}

Write Preview
Loading…
Cancel
Save