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Update NotesProvider.java

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master
p42car8zu 3 months ago
parent 5e4640f210
commit 7cdbc4f703
1 changed files with 60 additions and 64 deletions
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124
xiaomi/src/data/NotesProvider.java
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@ -16,7 +16,6 @@
package net.micode.notes.data;
import android.app.SearchManager;
import android.content.ContentProvider;
import android.content.ContentUris;
@ -34,7 +33,6 @@ 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;
@ -42,28 +40,28 @@ public class NotesProvider extends ContentProvider {
private static final String TAG = "NotesProvider";
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_NOTE = 1; // 笔记表 URI
private static final int URI_NOTE_ITEM = 2; // 单条笔记 URI
private static final int URI_DATA = 3; // 数据表 URI
private static final int URI_DATA_ITEM = 4; // 单条数据 URI
private static final int URI_SEARCH = 5;
private static final int URI_SEARCH_SUGGEST = 6;
private static final int URI_SEARCH = 5; // 搜索 URI
private static final int URI_SEARCH_SUGGEST = 6; // 搜索建议 URI
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); // 匹配笔记表
mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); // 匹配单条笔记
mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); // 匹配数据表
mMatcher.addURI(Notes.AUTHORITY, "data/#", URI_DATA_ITEM); // 匹配单条数据
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.
* x'0A' 代表 sqlite 中的 '\n' 字符。对于搜索结果中的标题和内容，
* 我们将修剪 '\n' 和空格，以便显示更多信息。
*/
private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + ","
+ NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + ","
@ -81,7 +79,7 @@ public class NotesProvider extends ContentProvider {
@Override
public boolean onCreate() {
mHelper = NotesDatabaseHelper.getInstance(getContext());
mHelper = NotesDatabaseHelper.getInstance(getContext()); // 获取数据库帮助类实例
return true;
}
@ -89,41 +87,41 @@ public class NotesProvider extends ContentProvider {
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
Cursor c = null;
SQLiteDatabase db = mHelper.getReadableDatabase();
SQLiteDatabase db = mHelper.getReadableDatabase(); // 获取可读数据库
String id = null;
switch (mMatcher.match(uri)) {
case URI_NOTE:
c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
sortOrder);
sortOrder); // 查询笔记表
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);
+ parseSelection(selection), selectionArgs, null, null, sortOrder); // 查询单条笔记
break;
case URI_DATA:
c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
sortOrder);
sortOrder); // 查询数据表
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);
+ parseSelection(selection), selectionArgs, null, null, sortOrder); // 查询单条数据
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");
"do not specify sortOrder, selection, selectionArgs, or projection" + "with this query"); // 不允许指定排序、选择条件或投影
}
String searchString = null;
if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
if (uri.getPathSegments().size() > 1) {
searchString = uri.getPathSegments().get(1);
searchString = uri.getPathSegments().get(1); // 获取搜索字符串
}
} else {
searchString = uri.getQueryParameter("pattern");
searchString = uri.getQueryParameter("pattern"); // 获取搜索模式
}
if (TextUtils.isEmpty(searchString)) {
@ -131,98 +129,97 @@ public class NotesProvider extends ContentProvider {
}
try {
searchString = String.format("%%%s%%", searchString);
searchString = String.format("%%%s%%", searchString); // 格式化搜索字符串
c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
new String[] { searchString });
new String[] { searchString }); // 执行搜索查询
} catch (IllegalStateException ex) {
Log.e(TAG, "got exception: " + ex.toString());
}
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
throw new IllegalArgumentException("Unknown URI " + uri); // 未知 URI
}
if (c != null) {
c.setNotificationUri(getContext().getContentResolver(), uri);
c.setNotificationUri(getContext().getContentResolver(), uri); // 设置通知 URI
}
return c;
}
@Override
public Uri insert(Uri uri, ContentValues values) {
SQLiteDatabase db = mHelper.getWritableDatabase();
SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
long dataId = 0, noteId = 0, insertedId = 0;
switch (mMatcher.match(uri)) {
case URI_NOTE:
insertedId = noteId = db.insert(TABLE.NOTE, null, values);
insertedId = noteId = db.insert(TABLE.NOTE, null, values); // 插入笔记
break;
case URI_DATA:
if (values.containsKey(DataColumns.NOTE_ID)) {
noteId = values.getAsLong(DataColumns.NOTE_ID);
noteId = values.getAsLong(DataColumns.NOTE_ID); // 获取笔记 ID
} else {
Log.d(TAG, "Wrong data format without note id:" + values.toString());
}
insertedId = dataId = db.insert(TABLE.DATA, null, values);
insertedId = dataId = db.insert(TABLE.DATA, null, values); // 插入数据
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
throw new IllegalArgumentException("Unknown URI " + uri); // 未知 URI
}
// Notify the note uri
// 通知笔记 URI
if (noteId > 0) {
getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
}
// Notify the data uri
// 通知数据 URI
if (dataId > 0) {
getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
}
return ContentUris.withAppendedId(uri, insertedId);
return ContentUris.withAppendedId(uri, insertedId); // 返回插入的 URI
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
int count = 0;
String id = null;
SQLiteDatabase db = mHelper.getWritableDatabase();
SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
boolean deleteData = false;
switch (mMatcher.match(uri)) {
case URI_NOTE:
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
count = db.delete(TABLE.NOTE, selection, selectionArgs);
count = db.delete(TABLE.NOTE, selection, selectionArgs); // 删除笔记
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
/**
* ID that smaller than 0 is system folder which is not allowed to
* trash
* ID 小于 0 的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);
NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs); // 删除单条笔记
break;
case URI_DATA:
count = db.delete(TABLE.DATA, selection, selectionArgs);
count = db.delete(TABLE.DATA, selection, selectionArgs); // 删除数据
deleteData = true;
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
count = db.delete(TABLE.DATA,
DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs); // 删除单条数据
deleteData = true;
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
throw new IllegalArgumentException("Unknown URI " + uri); // 未知 URI
}
if (count > 0) {
if (deleteData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); // 通知笔记 URI
}
getContext().getContentResolver().notifyChange(uri, null);
getContext().getContentResolver().notifyChange(uri, null); // 通知数据 URI
}
return count;
}
@ -231,44 +228,44 @@ public class NotesProvider extends ContentProvider {
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
int count = 0;
String id = null;
SQLiteDatabase db = mHelper.getWritableDatabase();
SQLiteDatabase db = mHelper.getWritableDatabase(); // 获取可写数据库
boolean updateData = false;
switch (mMatcher.match(uri)) {
case URI_NOTE:
increaseNoteVersion(-1, selection, selectionArgs);
count = db.update(TABLE.NOTE, values, selection, selectionArgs);
increaseNoteVersion(-1, selection, selectionArgs); // 增加笔记版本
count = db.update(TABLE.NOTE, values, selection, selectionArgs); // 更新笔记
break;
case URI_NOTE_ITEM:
id = uri.getPathSegments().get(1);
increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
increaseNoteVersion(Long.valueOf(id), selection, selectionArgs); // 增加单条笔记版本
count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
+ parseSelection(selection), selectionArgs); // 更新单条笔记
break;
case URI_DATA:
count = db.update(TABLE.DATA, values, selection, selectionArgs);
count = db.update(TABLE.DATA, values, selection, selectionArgs); // 更新数据
updateData = true;
break;
case URI_DATA_ITEM:
id = uri.getPathSegments().get(1);
count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
+ parseSelection(selection), selectionArgs); // 更新单条数据
updateData = true;
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
throw new IllegalArgumentException("Unknown URI " + uri); // 未知 URI
}
if (count > 0) {
if (updateData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); // 通知笔记 URI
}
getContext().getContentResolver().notifyChange(uri, null);
getContext().getContentResolver().notifyChange(uri, null); // 通知数据 URI
}
return count;
}
private String parseSelection(String selection) {
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); // 解析选择条件
}
private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
@ -277,23 +274,23 @@ public class NotesProvider extends ContentProvider {
sql.append(TABLE.NOTE);
sql.append(" SET ");
sql.append(NoteColumns.VERSION);
sql.append("=" + NoteColumns.VERSION + "+1 ");
sql.append("=" + NoteColumns.VERSION + "+1 "); // 增加版本号
if (id > 0 || !TextUtils.isEmpty(selection)) {
sql.append(" WHERE ");
}
if (id > 0) {
sql.append(NoteColumns.ID + "=" + String.valueOf(id));
sql.append(NoteColumns.ID + "=" + String.valueOf(id)); // 指定 ID
}
if (!TextUtils.isEmpty(selection)) {
String selectString = id > 0 ? parseSelection(selection) : selection;
for (String args : selectionArgs) {
selectString = selectString.replaceFirst("\\?", args);
}
sql.append(selectString);
sql.append(selectString); // 添加选择条件
}
mHelper.getWritableDatabase().execSQL(sql.toString());
mHelper.getWritableDatabase().execSQL(sql.toString()); // 执行 SQL 语句
}
@Override
@ -301,5 +298,4 @@ public class NotesProvider extends ContentProvider {
// TODO Auto-generated method stub
return null;
}
}

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