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/*
* 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.
*/
// 包声明,表明该类属于 net.micode.notes.data 包
package net.micode.notes.data;
// 导入 Android 上下文相关类,用于获取应用程序的上下文信息
import android.content.Context;
// 导入 Android 数据库游标类,用于处理数据库查询结果
import android.database.Cursor;
// 导入联系人合约中电话相关的类,用于操作联系人的电话号码信息
import android.provider.ContactsContract.CommonDataKinds.Phone;
// 导入联系人合约中数据相关的类,用于操作联系人的数据信息
import android.provider.ContactsContract.Data;
// 导入电话号码处理工具类,用于处理电话号码的格式等操作
import android.telephony.PhoneNumberUtils;
// 导入日志工具类,用于记录应用程序的日志信息
import android.util.Log;
// 导入 Java 中的 HashMap 类,用于存储键值对数据
import java.util.HashMap;
/**
* Contact 使
*/
public class Contact {
// 静态变量,用于缓存电话号码和对应的联系人姓名,避免重复查询数据库
private static HashMap<String, String> sContactCache;
// 静态常量,用于标识日志的标签,方便在日志中区分不同类的日志信息
private static final String TAG = "Contact";
// 静态常量,用于构建查询联系人的 SQL 语句,通过电话号码匹配联系人
private static final String CALLER_ID_SELECTION = "PHONE_NUMBERS_EQUAL(" + Phone.NUMBER
+ ",?) AND " + Data.MIMETYPE + "='" + Phone.CONTENT_ITEM_TYPE + "'"
+ " AND " + Data.RAW_CONTACT_ID + " IN "
+ "(SELECT raw_contact_id "
+ " FROM phone_lookup"
+ " WHERE min_match = '+')";
/**
*
*
* @param context
* @param phoneNumber
* @return null
*/
public static String getContact(Context context, String phoneNumber) {
// 检查缓存是否为空,如果为空则创建一个新的 HashMap 实例
if (sContactCache == null) {
sContactCache = new HashMap<String, String>();
}
// 检查缓存中是否已经存在该电话号码对应的联系人姓名
if (sContactCache.containsKey(phoneNumber)) {
// 如果存在,则直接从缓存中获取并返回联系人姓名
return sContactCache.get(phoneNumber);
}
// 将查询语句中的占位符 '+' 替换为处理后的电话号码最小匹配字符串
String selection = CALLER_ID_SELECTION.replace("+",
PhoneNumberUtils.toCallerIDMinMatch(phoneNumber));
// 使用内容解析器查询联系人数据库,获取匹配的联系人姓名
Cursor cursor = context.getContentResolver().query(
Data.CONTENT_URI, // 查询的内容 URI
new String[]{Phone.DISPLAY_NAME}, // 查询的列名,只查询联系人姓名
selection, // 查询的条件语句
new String[]{phoneNumber}, // 查询条件的参数
null // 查询结果的排序方式
);
// 检查游标是否不为空且至少有一行数据
if (cursor != null && cursor.moveToFirst()) {
try {
// 从游标中获取联系人姓名
String name = cursor.getString(0);
// 将电话号码和对应的联系人姓名存入缓存
sContactCache.put(phoneNumber, name);
// 返回联系人姓名
return name;
} catch (IndexOutOfBoundsException e) {
// 捕获索引越界异常,并记录错误日志
Log.e(TAG, " Cursor get string error " + e.toString());
// 发生异常时返回 null
return null;
} finally {
// 无论是否发生异常,最后都关闭游标,释放资源
cursor.close();
}
} else {
// 如果没有找到匹配的联系人,记录日志信息
Log.d(TAG, "No contact matched with number:" + phoneNumber);
// 返回 null
return null;
}
}
}

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/*
* 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.
*/
// 包声明,表明该类属于 net.micode.notes.data 包
package net.micode.notes.data;
// 导入 Android 系统中用于表示统一资源标识符的类
import android.net.Uri;
/**
* Notes
*
*/
public class Notes {
// 定义内容提供者的授权信息,用于标识笔记应用的内容提供者
public static final String AUTHORITY = "micode_notes";
// 定义日志标签,用于在日志中标识该类的相关信息
public static final String TAG = "Notes";
// 定义笔记类型的常量
// 表示普通笔记类型
public static final int TYPE_NOTE = 0;
// 表示文件夹类型
public static final int TYPE_FOLDER = 1;
// 表示系统文件夹类型
public static final int TYPE_SYSTEM = 2;
/**
*
* {@link Notes#ID_ROOT_FOLDER }
* {@link Notes#ID_TEMPARAY_FOLDER }
* {@link Notes#ID_CALL_RECORD_FOLDER}
*/
// 根文件夹的 ID
public static final int ID_ROOT_FOLDER = 0;
// 临时文件夹的 ID
public static final int ID_TEMPARAY_FOLDER = -1;
// 通话记录文件夹的 ID
public static final int ID_CALL_RECORD_FOLDER = -2;
// 回收站文件夹的 ID
public static final int ID_TRASH_FOLER = -3;
// 定义意图额外数据的键,用于在不同组件间传递特定数据
// 传递提醒日期的键
public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date";
// 传递背景颜色 ID 的键
public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id";
// 传递小部件 ID 的键
public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id";
// 传递小部件类型的键
public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type";
// 传递文件夹 ID 的键
public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id";
// 传递通话日期的键
public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date";
// 定义小部件类型的常量
// 表示无效的小部件类型
public static final int TYPE_WIDGET_INVALIDE = -1;
// 表示 2x 大小的小部件类型
public static final int TYPE_WIDGET_2X = 0;
// 表示 4x 大小的小部件类型
public static final int TYPE_WIDGET_4X = 1;
/**
* DataConstants
*/
public static class DataConstants {
// 表示文本笔记的内容项类型
public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
// 表示通话笔记的内容项类型
public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
}
/**
* Uri
*/
public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");
/**
* Uri
*/
public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data");
/**
* NoteColumns
*/
public interface NoteColumns {
/**
* ID
* <P> : INTEGER (long) </P>
*/
public static final String ID = "_id";
/**
* ID
* <P> : INTEGER (long) </P>
*/
public static final String PARENT_ID = "parent_id";
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String CREATED_DATE = "created_date";
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String MODIFIED_DATE = "modified_date";
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String ALERTED_DATE = "alert_date";
/**
*
* <P> : TEXT </P>
*/
public static final String SNIPPET = "snippet";
/**
* ID
* <P> : INTEGER (long) </P>
*/
public static final String WIDGET_ID = "widget_id";
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String WIDGET_TYPE = "widget_type";
/**
* ID
* <P> : INTEGER (long) </P>
*/
public static final String BG_COLOR_ID = "bg_color_id";
/**
*
* <P> : INTEGER </P>
*/
public static final String HAS_ATTACHMENT = "has_attachment";
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String NOTES_COUNT = "notes_count";
/**
*
* <P> : INTEGER </P>
*/
public static final String TYPE = "type";
/**
* ID
* <P> : INTEGER (long) </P>
*/
public static final String SYNC_ID = "sync_id";
/**
*
* <P> : INTEGER </P>
*/
public static final String LOCAL_MODIFIED = "local_modified";
/**
* ID
* <P> : INTEGER </P>
*/
public static final String ORIGIN_PARENT_ID = "origin_parent_id";
/**
* Gtask ID
* <P> : TEXT </P>
*/
public static final String GTASK_ID = "gtask_id";
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String VERSION = "version";
}
/**
* DataColumns
*/
public interface DataColumns {
/**
* ID
* <P> : INTEGER (long) </P>
*/
public static final String ID = "_id";
/**
* MIME
* <P> : Text </P>
*/
public static final String MIME_TYPE = "mime_type";
/**
* ID
* <P> : INTEGER (long) </P>
*/
public static final String NOTE_ID = "note_id";
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String CREATED_DATE = "created_date";
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String MODIFIED_DATE = "modified_date";
/**
*
* <P> : TEXT </P>
*/
public static final String CONTENT = "content";
/**
* {@link #MIMETYPE}
* <P> : INTEGER </P>
*/
public static final String DATA1 = "data1";
/**
* {@link #MIMETYPE}
* <P> : INTEGER </P>
*/
public static final String DATA2 = "data2";
/**
* {@link #MIMETYPE}
* <P> : TEXT </P>
*/
public static final String DATA3 = "data3";
/**
* {@link #MIMETYPE}
* <P> : TEXT </P>
*/
public static final String DATA4 = "data4";
/**
* {@link #MIMETYPE}
* <P> : TEXT </P>
*/
public static final String DATA5 = "data5";
}
/**
* TextNote DataColumns
*/
public static final class TextNote implements DataColumns {
/**
*
* <P> : Integer 1: 0: </P>
*/
public static final String MODE = DATA1;
// 检查列表模式的值
public static final int MODE_CHECK_LIST = 1;
// 文本笔记的内容类型
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note";
// 文本笔记的内容项类型
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note";
// 文本笔记的 Uri
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note");
}
/**
* CallNote DataColumns
*/
public static final class CallNote implements DataColumns {
/**
*
* <P> : INTEGER (long) </P>
*/
public static final String CALL_DATE = DATA1;
/**
*
* <P> : TEXT </P>
*/
public static final String PHONE_NUMBER = DATA3;
// 通话笔记的内容类型
public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note";
// 通话笔记的内容项类型
public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note";
// 通话笔记的 Uri
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note");
}
}

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/*
* 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.
*/
// 包声明,表明该类属于 net.micode.notes.data 包
package net.micode.notes.data;
// 导入用于存储键值对,通常用于数据库操作中插入数据
import android.content.ContentValues;
// 导入 Android 上下文类,用于获取应用程序的环境信息
import android.content.Context;
// 导入 SQLite 数据库操作类,用于对数据库进行读写操作
import android.database.sqlite.SQLiteDatabase;
// 导入 SQLite 数据库辅助类,用于管理数据库的创建和版本更新
import android.database.sqlite.SQLiteOpenHelper;
// 导入日志工具类,用于在开发和调试过程中记录信息
import android.util.Log;
// 导入 Notes 类中的 DataColumns 接口,用于引用数据列的常量
import net.micode.notes.data.Notes.DataColumns;
// 导入 Notes 类中的 DataConstants 类,用于引用数据相关的常量
import net.micode.notes.data.Notes.DataConstants;
// 导入 Notes 类中的 NoteColumns 接口,用于引用笔记列的常量
import net.micode.notes.data.Notes.NoteColumns;
/**
* NotesDatabaseHelper SQLiteOpenHelper SQLite
*
*/
public class NotesDatabaseHelper extends SQLiteOpenHelper {
// 数据库文件名
private static final String DB_NAME = "note.db";
// 数据库版本号
private static final int DB_VERSION = 4;
/**
* TABLE
*/
public interface TABLE {
// 笔记表的名称
public static final String NOTE = "note";
// 数据表的名称
public static final String DATA = "data";
}
// 日志标签,用于在日志中标识该类的信息
private static final String TAG = "NotesDatabaseHelper";
// 单例模式下的实例对象
private static NotesDatabaseHelper mInstance;
// 创建笔记表的 SQL 语句
private static final String CREATE_NOTE_TABLE_SQL =
"CREATE TABLE " + TABLE.NOTE + "(" +
NoteColumns.ID + " INTEGER PRIMARY KEY," +
NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.ALERTED_DATE + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.BG_COLOR_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.HAS_ATTACHMENT + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.NOTES_COUNT + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.SNIPPET + " TEXT NOT NULL DEFAULT ''," +
NoteColumns.TYPE + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.WIDGET_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.WIDGET_TYPE + " INTEGER NOT NULL DEFAULT -1," +
NoteColumns.SYNC_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.LOCAL_MODIFIED + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," +
NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" +
")";
// 创建数据表的 SQL 语句
private static final String CREATE_DATA_TABLE_SQL =
"CREATE TABLE " + TABLE.DATA + "(" +
DataColumns.ID + " INTEGER PRIMARY KEY," +
DataColumns.MIME_TYPE + " TEXT NOT NULL," +
DataColumns.NOTE_ID + " INTEGER NOT NULL DEFAULT 0," +
NoteColumns.CREATED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
NoteColumns.MODIFIED_DATE + " INTEGER NOT NULL DEFAULT (strftime('%s','now') * 1000)," +
DataColumns.CONTENT + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA1 + " INTEGER," +
DataColumns.DATA2 + " INTEGER," +
DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," +
DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" +
")";
// 创建数据表中 note_id 索引的 SQL 语句
private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =
"CREATE INDEX IF NOT EXISTS note_id_index ON " +
TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";
/**
* SQL
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_update "+
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
" BEGIN " +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END";
/**
* SQL
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_update " +
" AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE +
" BEGIN " +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
" AND " + NoteColumns.NOTES_COUNT + ">0" + ";" +
" END";
/**
* SQL
*/
private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER =
"CREATE TRIGGER increase_folder_count_on_insert " +
" AFTER INSERT ON " + TABLE.NOTE +
" BEGIN " +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" +
" WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" +
" END";
/**
* SQL
*/
private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER =
"CREATE TRIGGER decrease_folder_count_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
" BEGIN " +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" +
" WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID +
" AND " + NoteColumns.NOTES_COUNT + ">0;" +
" END";
/**
* {@link DataConstants#NOTE} SQL
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER =
"CREATE TRIGGER update_note_content_on_insert " +
" AFTER INSERT ON " + TABLE.DATA +
" WHEN new." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END";
/**
* {@link DataConstants#NOTE} SQL
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER =
"CREATE TRIGGER update_note_content_on_update " +
" AFTER UPDATE ON " + TABLE.DATA +
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT +
" WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" +
" END";
/**
* {@link DataConstants#NOTE} SQL
*/
private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER =
"CREATE TRIGGER update_note_content_on_delete " +
" AFTER delete ON " + TABLE.DATA +
" WHEN old." + DataColumns.MIME_TYPE + "='" + DataConstants.NOTE + "'" +
" BEGIN" +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.SNIPPET + "=''" +
" WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" +
" END";
/**
* SQL
*/
private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER =
"CREATE TRIGGER delete_data_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
" BEGIN" +
" DELETE FROM " + TABLE.DATA +
" WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" +
" END";
/**
* SQL
*/
private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER =
"CREATE TRIGGER folder_delete_notes_on_delete " +
" AFTER DELETE ON " + TABLE.NOTE +
" BEGIN" +
" DELETE FROM " + TABLE.NOTE +
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END";
/**
* SQL
*/
private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER =
"CREATE TRIGGER folder_move_notes_on_trash " +
" AFTER UPDATE ON " + TABLE.NOTE +
" WHEN new." + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
" BEGIN" +
" UPDATE " + TABLE.NOTE +
" SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER +
" WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" +
" END";
/**
* NotesDatabaseHelper
* @param context
*/
public NotesDatabaseHelper(Context context) {
// 调用父类 SQLiteOpenHelper 的构造函数,传入上下文、数据库名、游标工厂和数据库版本号
super(context, DB_NAME, null, DB_VERSION);
}
/**
*
* @param db SQLite
*/
public void createNoteTable(SQLiteDatabase db) {
// 执行创建笔记表的 SQL 语句
db.execSQL(CREATE_NOTE_TABLE_SQL);
// 重新创建笔记表的触发器
reCreateNoteTableTriggers(db);
// 创建系统文件夹
createSystemFolder(db);
// 记录日志,表明笔记表已创建
Log.d(TAG, "note table has been created");
}
/**
*
* @param db SQLite
*/
private void reCreateNoteTableTriggers(SQLiteDatabase db) {
// 删除旧的触发器
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update");
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update");
db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS delete_data_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS folder_delete_notes_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS folder_move_notes_on_trash");
// 创建新的触发器
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER);
db.execSQL(NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER);
db.execSQL(NOTE_DELETE_DATA_ON_DELETE_TRIGGER);
db.execSQL(NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER);
db.execSQL(FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER);
db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER);
}
/**
*
* @param db SQLite
*/
private void createSystemFolder(SQLiteDatabase db) {
// 用于存储要插入的数据
ContentValues values = new ContentValues();
/**
*
*/
// 设置文件夹的 ID
values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER);
// 设置文件夹的类型为系统文件夹
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
// 插入数据到笔记表
db.insert(TABLE.NOTE, null, values);
/**
*
*/
// 清空之前存储的数据
values.clear();
values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
/**
*
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
/**
*
*/
values.clear();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
}
/**
*
* @param db SQLite
*/
public void createDataTable(SQLiteDatabase db) {
// 执行创建数据表的 SQL 语句
db.execSQL(CREATE_DATA_TABLE_SQL);
// 重新创建数据表的触发器
reCreateDataTableTriggers(db);
// 执行创建数据表中 note_id 索引的 SQL 语句
db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL);
// 记录日志,表明数据表已创建
Log.d(TAG, "data table has been created");
}
/**
*
* @param db SQLite
*/
private void reCreateDataTableTriggers(SQLiteDatabase db) {
// 删除旧的触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update");
db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete");
// 创建新的触发器
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER);
db.execSQL(DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER);
}
/**
* NotesDatabaseHelper
* @param context
* @return NotesDatabaseHelper
*/
static synchronized NotesDatabaseHelper getInstance(Context context) {
// 检查实例是否为空
if (mInstance == null) {
// 如果为空,则创建新的实例
mInstance = new NotesDatabaseHelper(context);
}
// 返回实例
return mInstance;
}
/**
*
* @param db SQLite
*/
@Override
public void onCreate(SQLiteDatabase db) {
// 创建笔记表
createNoteTable(db);
// 创建数据表
createDataTable(db);
}
/**
*
* @param db SQLite
* @param oldVersion
* @param newVersion
*/
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// 标记是否需要重新创建触发器
boolean reCreateTriggers = false;
// 标记是否跳过从版本 2 到版本 3 的升级
boolean skipV2 = false;
// 如果旧版本是 1
if (oldVersion == 1) {
// 升级到版本 2
upgradeToV2(db);
// 标记跳过从版本 2 到版本 3 的升级
skipV2 = true;
// 旧版本号加 1
oldVersion++;
}
// 如果旧版本是 2 且不跳过升级
if (oldVersion == 2 && !skipV2) {
// 升级到版本 3
upgradeToV3(db);
// 标记需要重新创建触发器
reCreateTriggers = true;
oldVersion++;
}
// 如果旧版本是 3
if (oldVersion == 3) {
// 升级到版本 4
upgradeToV4(db);
oldVersion++;
}
// 如果需要重新创建触发器
if (reCreateTriggers) {
// 重新创建笔记表的触发器
reCreateNoteTableTriggers(db);
// 重新创建数据表的触发器
reCreateDataTableTriggers(db);
}
// 如果旧版本号不等于新版本号,说明升级失败,抛出异常
if (oldVersion != newVersion) {
throw new IllegalStateException("Upgrade notes database to version " + newVersion
+ "fails");
}
}
/**
* 1 2
* @param db SQLite
*/
private void upgradeToV2(SQLiteDatabase db) {
// 删除旧的笔记表
db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE);
// 删除旧的数据表
db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA);
// 创建新的笔记表
createNoteTable(db);
// 创建新的数据表
createDataTable(db);
}
/**
* 2 3
* @param db SQLite
*/
private void upgradeToV3(SQLiteDatabase db) {
// 删除无用的触发器
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_delete");
db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_update");
// 为笔记表添加 gtask_id 列
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.GTASK_ID
+ " TEXT NOT NULL DEFAULT ''");
// 创建回收站系统文件夹
ContentValues values = new ContentValues();
values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER);
values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM);
db.insert(TABLE.NOTE, null, values);
}
/**
* 3 4
* @param db SQLite
*/
private void upgradeToV4(SQLiteDatabase db) {
// 为笔记表添加 version 列
db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION
+ " INTEGER NOT NULL DEFAULT 0");
}
}

@ -0,0 +1,431 @@
/*
* 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.
*/
// 包声明,表明该类属于 net.micode.notes.data 包
package net.micode.notes.data;
// 导入 Android 搜索管理相关类,用于处理搜索功能
import android.app.SearchManager;
// 导入 Android 内容提供者基类,用于与外部应用共享数据
import android.content.ContentProvider;
// 导入 Android 用于处理 Content URI 并添加 ID 的工具类
import android.content.ContentUris;
// 导入 Android 用于存储键值对,通常用于数据库操作中插入或更新数据
import android.content.ContentValues;
// 导入 Android 用于在不同组件间传递消息的类
import android.content.Intent;
// 导入 Android 用于匹配 URI 的工具类
import android.content.UriMatcher;
// 导入 Android 数据库游标类,用于处理数据库查询结果
import android.database.Cursor;
// 导入 Android SQLite 数据库操作类,用于对数据库进行读写操作
import android.database.sqlite.SQLiteDatabase;
// 导入 Android 用于表示统一资源标识符的类
import android.net.Uri;
// 导入 Android 用于处理文本相关操作的工具类
import android.text.TextUtils;
// 导入 Android 日志工具类,用于在开发和调试过程中记录信息
import android.util.Log;
// 导入应用资源类,用于引用应用内的资源
import net.micode.notes.R;
// 导入 Notes 类中的 DataColumns 接口,用于引用数据列的常量
import net.micode.notes.data.Notes.DataColumns;
// 导入 Notes 类中的 NoteColumns 接口,用于引用笔记列的常量
import net.micode.notes.data.Notes.NoteColumns;
// 导入 NotesDatabaseHelper 类中的 TABLE 接口,用于引用数据库表名常量
import net.micode.notes.data.NotesDatabaseHelper.TABLE;
/**
* NotesProvider ContentProvider
* ContentResolver 访
*/
public class NotesProvider extends ContentProvider {
// 用于匹配 URI 的对象
private static final UriMatcher mMatcher;
// 数据库帮助类的实例
private NotesDatabaseHelper mHelper;
// 日志标签,用于在日志中标识该类的信息
private static final String TAG = "NotesProvider";
// 定义不同 URI 匹配结果的常量
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,在类加载时初始化 UriMatcher
static {
// 创建一个 UriMatcher 实例,初始匹配值为 NO_MATCH
mMatcher = new UriMatcher(UriMatcher.NO_MATCH);
// 添加不同的 URI 匹配规则
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);
}
/**
* x'0A' SQLite '\n'
* '\n'
*/
// 笔记搜索的投影,定义了搜索结果的列
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;
// 笔记片段搜索的 SQL 查询语句
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;
/**
* ContentProvider
* @return true false
*/
@Override
public boolean onCreate() {
// 获取 NotesDatabaseHelper 的单例实例
mHelper = NotesDatabaseHelper.getInstance(getContext());
return true;
}
/**
* URI
* @param uri URI
* @param projection
* @param selection
* @param selectionArgs
* @param sortOrder
* @return
*/
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
String sortOrder) {
// 初始化游标
Cursor c = null;
// 获取可读的数据库实例
SQLiteDatabase db = mHelper.getReadableDatabase();
// 用于存储从 URI 中提取的 ID
String id = null;
// 根据 URI 匹配结果执行不同的查询操作
switch (mMatcher.match(uri)) {
case URI_NOTE:
// 查询笔记表
c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null,
sortOrder);
break;
case URI_NOTE_ITEM:
// 从 URI 中提取笔记 ID
id = uri.getPathSegments().get(1);
// 根据笔记 ID 查询笔记表
c = db.query(TABLE.NOTE, projection, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs, null, null, sortOrder);
break;
case URI_DATA:
// 查询数据表
c = db.query(TABLE.DATA, projection, selection, selectionArgs, null, null,
sortOrder);
break;
case URI_DATA_ITEM:
// 从 URI 中提取数据 ID
id = uri.getPathSegments().get(1);
// 根据数据 ID 查询数据表
c = db.query(TABLE.DATA, projection, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs, null, null, sortOrder);
break;
case URI_SEARCH:
case URI_SEARCH_SUGGEST:
// 搜索查询不允许指定排序规则、投影等参数
if (sortOrder != null || projection != null) {
throw new IllegalArgumentException(
"do not specify sortOrder, selection, selectionArgs, or projection" + "with this query");
}
// 用于存储搜索字符串
String searchString = null;
if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) {
if (uri.getPathSegments().size() > 1) {
// 从 URI 中提取搜索字符串
searchString = uri.getPathSegments().get(1);
}
} else {
// 从查询参数中获取搜索字符串
searchString = uri.getQueryParameter("pattern");
}
// 如果搜索字符串为空,返回 null
if (TextUtils.isEmpty(searchString)) {
return null;
}
try {
// 格式化搜索字符串
searchString = String.format("%%%s%%", searchString);
// 执行搜索查询
c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY,
new String[] { searchString });
} catch (IllegalStateException ex) {
// 记录异常信息
Log.e(TAG, "got exception: " + ex.toString());
}
break;
default:
// 未知 URI 抛出异常
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 如果游标不为空,设置通知 URI
if (c != null) {
c.setNotificationUri(getContext().getContentResolver(), uri);
}
return c;
}
/**
* URI
* @param uri URI
* @param values
* @return URI
*/
@Override
public Uri insert(Uri uri, ContentValues values) {
// 获取可写的数据库实例
SQLiteDatabase db = mHelper.getWritableDatabase();
// 初始化数据 ID、笔记 ID 和插入的 ID
long dataId = 0, noteId = 0, insertedId = 0;
// 根据 URI 匹配结果执行不同的插入操作
switch (mMatcher.match(uri)) {
case URI_NOTE:
// 插入笔记数据
insertedId = noteId = db.insert(TABLE.NOTE, null, values);
break;
case URI_DATA:
if (values.containsKey(DataColumns.NOTE_ID)) {
// 获取数据所属的笔记 ID
noteId = values.getAsLong(DataColumns.NOTE_ID);
} else {
// 记录错误信息
Log.d(TAG, "Wrong data format without note id:" + values.toString());
}
// 插入数据
insertedId = dataId = db.insert(TABLE.DATA, null, values);
break;
default:
// 未知 URI 抛出异常
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 通知笔记 URI 数据已更改
if (noteId > 0) {
getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null);
}
// 通知数据 URI 数据已更改
if (dataId > 0) {
getContext().getContentResolver().notifyChange(
ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null);
}
// 返回插入数据后的 URI
return ContentUris.withAppendedId(uri, insertedId);
}
/**
* URI
* @param uri URI
* @param selection
* @param selectionArgs
* @return
*/
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
// 初始化删除的行数
int count = 0;
// 用于存储从 URI 中提取的 ID
String id = null;
// 获取可写的数据库实例
SQLiteDatabase db = mHelper.getWritableDatabase();
// 标记是否删除数据
boolean deleteData = false;
// 根据 URI 匹配结果执行不同的删除操作
switch (mMatcher.match(uri)) {
case URI_NOTE:
// 确保删除的笔记 ID 大于 0
selection = "(" + selection + ") AND " + NoteColumns.ID + ">0 ";
// 删除笔记数据
count = db.delete(TABLE.NOTE, selection, selectionArgs);
break;
case URI_NOTE_ITEM:
// 从 URI 中提取笔记 ID
id = uri.getPathSegments().get(1);
/**
* ID 0
*/
long noteId = Long.valueOf(id);
if (noteId <= 0) {
break;
}
// 根据笔记 ID 删除笔记数据
count = db.delete(TABLE.NOTE,
NoteColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
break;
case URI_DATA:
// 删除数据
count = db.delete(TABLE.DATA, selection, selectionArgs);
deleteData = true;
break;
case URI_DATA_ITEM:
// 从 URI 中提取数据 ID
id = uri.getPathSegments().get(1);
// 根据数据 ID 删除数据
count = db.delete(TABLE.DATA,
DataColumns.ID + "=" + id + parseSelection(selection), selectionArgs);
deleteData = true;
break;
default:
// 未知 URI 抛出异常
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 如果删除行数大于 0通知数据已更改
if (count > 0) {
if (deleteData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
}
getContext().getContentResolver().notifyChange(uri, null);
}
return count;
}
/**
* URI
* @param uri URI
* @param values
* @param selection
* @param selectionArgs
* @return
*/
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
// 初始化更新的行数
int count = 0;
// 用于存储从 URI 中提取的 ID
String id = null;
// 获取可写的数据库实例
SQLiteDatabase db = mHelper.getWritableDatabase();
// 标记是否更新数据
boolean updateData = false;
// 根据 URI 匹配结果执行不同的更新操作
switch (mMatcher.match(uri)) {
case URI_NOTE:
// 增加笔记版本号
increaseNoteVersion(-1, selection, selectionArgs);
// 更新笔记数据
count = db.update(TABLE.NOTE, values, selection, selectionArgs);
break;
case URI_NOTE_ITEM:
// 从 URI 中提取笔记 ID
id = uri.getPathSegments().get(1);
// 增加笔记版本号
increaseNoteVersion(Long.valueOf(id), selection, selectionArgs);
// 根据笔记 ID 更新笔记数据
count = db.update(TABLE.NOTE, values, NoteColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
break;
case URI_DATA:
// 更新数据
count = db.update(TABLE.DATA, values, selection, selectionArgs);
updateData = true;
break;
case URI_DATA_ITEM:
// 从 URI 中提取数据 ID
id = uri.getPathSegments().get(1);
// 根据数据 ID 更新数据
count = db.update(TABLE.DATA, values, DataColumns.ID + "=" + id
+ parseSelection(selection), selectionArgs);
updateData = true;
break;
default:
// 未知 URI 抛出异常
throw new IllegalArgumentException("Unknown URI " + uri);
}
// 如果更新行数大于 0通知数据已更改
if (count > 0) {
if (updateData) {
getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null);
}
getContext().getContentResolver().notifyChange(uri, null);
}
return count;
}
/**
* AND
* @param selection
* @return
*/
private String parseSelection(String selection) {
return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : "");
}
/**
*
* @param id ID
* @param selection
* @param selectionArgs
*/
private void increaseNoteVersion(long id, String selection, String[] selectionArgs) {
// 用于构建 SQL 语句
StringBuilder sql = new StringBuilder(120);
sql.append("UPDATE ");
sql.append(TABLE.NOTE);
sql.append(" SET ");
sql.append(NoteColumns.VERSION);
sql.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)) {
// 处理更新条件
String selectString = id > 0 ? parseSelection(selection) : selection;
for (String args : selectionArgs) {
selectString = selectString.replaceFirst("\\?", args);
}
sql.append(selectString);
}
// 执行 SQL 语句
mHelper.getWritableDatabase().execSQL(sql.toString());
}
/**
* URI MIME null
* @param uri MIME URI
* @return MIME
*/
@Override
public String getType(Uri uri) {
// TODO Auto-generated method stub
return null;
}
}

@ -0,0 +1,225 @@
/*
* 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.
*/
// 包声明,表明该类属于 net.micode.notes.widget 包
package net.micode.notes.widget;
// 导入用于创建待定意图的类,用于在未来某个时刻执行操作
import android.app.PendingIntent;
// 导入应用小部件管理器类,用于管理和更新应用小部件
import android.appwidget.AppWidgetManager;
// 导入应用小部件提供者基类,用于处理小部件的各种事件
import android.appwidget.AppWidgetProvider;
// 导入用于存储键值对,通常用于数据库操作中插入或更新数据
import android.content.ContentValues;
// 导入 Android 上下文类,用于获取应用程序的环境信息
import android.content.Context;
// 导入 Android 用于在不同组件间传递消息的类
import android.content.Intent;
// 导入 Android 数据库游标类,用于处理数据库查询结果
import android.database.Cursor;
// 导入 Android 日志工具类,用于在开发和调试过程中记录信息
import android.util.Log;
// 导入用于更新远程视图的类,可用于更新应用小部件的视图
import android.widget.RemoteViews;
// 导入应用资源类,用于引用应用内的资源
import net.micode.notes.R;
// 导入 Notes 类,用于引用笔记相关的常量和信息
import net.micode.notes.data.Notes;
// 导入 Notes 类中的 NoteColumns 接口,用于引用笔记列的常量
import net.micode.notes.data.Notes.NoteColumns;
// 导入资源解析工具类,用于解析资源
import net.micode.notes.tool.ResourceParser;
// 导入笔记编辑活动类,用于编辑笔记
import net.micode.notes.ui.NoteEditActivity;
// 导入笔记列表活动类,用于显示笔记列表
import net.micode.notes.ui.NotesListActivity;
/**
* NoteWidgetProvider AppWidgetProvider
*
*/
public abstract class NoteWidgetProvider extends AppWidgetProvider {
// 定义查询笔记信息时需要的列
public static final String [] PROJECTION = new String [] {
NoteColumns.ID,
NoteColumns.BG_COLOR_ID,
NoteColumns.SNIPPET
};
// 定义投影数组中各列的索引
public static final int COLUMN_ID = 0;
public static final int COLUMN_BG_COLOR_ID = 1;
public static final int COLUMN_SNIPPET = 2;
// 日志标签,用于在日志中标识该类的信息
private static final String TAG = "NoteWidgetProvider";
/**
* ID
* @param context
* @param appWidgetIds ID
*/
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
// 用于存储要更新的数据
ContentValues values = new ContentValues();
// 将笔记的小部件 ID 置为无效
values.put(NoteColumns.WIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
// 遍历被删除的小部件 ID 数组
for (int i = 0; i < appWidgetIds.length; i++) {
// 更新笔记数据,将对应小部件 ID 的笔记的小部件 ID 置为无效
context.getContentResolver().update(Notes.CONTENT_NOTE_URI,
values,
NoteColumns.WIDGET_ID + "=?",
new String[] { String.valueOf(appWidgetIds[i])});
}
}
/**
* ID
* @param context
* @param widgetId ID
* @return
*/
private Cursor getNoteWidgetInfo(Context context, int widgetId) {
// 查询笔记信息,排除回收站中的笔记
return context.getContentResolver().query(Notes.CONTENT_NOTE_URI,
PROJECTION,
NoteColumns.WIDGET_ID + "=? AND " + NoteColumns.PARENT_ID + "<>?",
new String[] { String.valueOf(widgetId), String.valueOf(Notes.ID_TRASH_FOLER) },
null);
}
/**
*
* @param context
* @param appWidgetManager
* @param appWidgetIds ID
*/
protected void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
update(context, appWidgetManager, appWidgetIds, false);
}
/**
*
* @param context
* @param appWidgetManager
* @param appWidgetIds ID
* @param privacyMode
*/
private void update(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds,
boolean privacyMode) {
// 遍历要更新的小部件 ID 数组
for (int i = 0; i < appWidgetIds.length; i++) {
// 检查小部件 ID 是否有效
if (appWidgetIds[i] != AppWidgetManager.INVALID_APPWIDGET_ID) {
// 获取默认背景 ID
int bgId = ResourceParser.getDefaultBgId(context);
// 初始化笔记摘要
String snippet = "";
// 创建启动笔记编辑活动的意图
Intent intent = new Intent(context, NoteEditActivity.class);
// 设置意图标志,确保活动以单顶模式启动
intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
// 传递小部件 ID 到意图中
intent.putExtra(Notes.INTENT_EXTRA_WIDGET_ID, appWidgetIds[i]);
// 传递小部件类型到意图中
intent.putExtra(Notes.INTENT_EXTRA_WIDGET_TYPE, getWidgetType());
// 获取指定小部件 ID 对应的笔记信息
Cursor c = getNoteWidgetInfo(context, appWidgetIds[i]);
if (c != null && c.moveToFirst()) {
// 检查是否存在多个具有相同小部件 ID 的笔记
if (c.getCount() > 1) {
// 记录错误信息
Log.e(TAG, "Multiple message with same widget id:" + appWidgetIds[i]);
// 关闭游标
c.close();
return;
}
// 获取笔记摘要
snippet = c.getString(COLUMN_SNIPPET);
// 获取背景 ID
bgId = c.getInt(COLUMN_BG_COLOR_ID);
// 传递笔记 ID 到意图中
intent.putExtra(Intent.EXTRA_UID, c.getLong(COLUMN_ID));
// 设置意图动作为查看
intent.setAction(Intent.ACTION_VIEW);
} else {
// 如果没有找到笔记信息,显示提示信息
snippet = context.getResources().getString(R.string.widget_havenot_content);
// 设置意图动作为插入或编辑
intent.setAction(Intent.ACTION_INSERT_OR_EDIT);
}
// 关闭游标
if (c != null) {
c.close();
}
// 创建远程视图,用于更新小部件的视图
RemoteViews rv = new RemoteViews(context.getPackageName(), getLayoutId());
// 设置小部件的背景图片资源
rv.setImageViewResource(R.id.widget_bg_image, getBgResourceId(bgId));
// 传递背景 ID 到意图中
intent.putExtra(Notes.INTENT_EXTRA_BACKGROUND_ID, bgId);
/**
* 宿
*/
PendingIntent pendingIntent = null;
if (privacyMode) {
// 在隐私模式下,显示提示信息
rv.setTextViewText(R.id.widget_text,
context.getString(R.string.widget_under_visit_mode));
// 创建启动笔记列表活动的待定意图
pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], new Intent(
context, NotesListActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
} else {
// 在非隐私模式下,显示笔记摘要
rv.setTextViewText(R.id.widget_text, snippet);
// 创建启动笔记编辑活动的待定意图
pendingIntent = PendingIntent.getActivity(context, appWidgetIds[i], intent,
PendingIntent.FLAG_UPDATE_CURRENT);
}
// 设置小部件文本视图的点击事件
rv.setOnClickPendingIntent(R.id.widget_text, pendingIntent);
// 更新指定小部件的视图
appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
}
}
}
/**
* ID ID
* @param bgId ID
* @return ID
*/
protected abstract int getBgResourceId(int bgId);
/**
* ID
* @return ID
*/
protected abstract int getLayoutId();
/**
*
* @return
*/
protected abstract int getWidgetType();
}

@ -0,0 +1,76 @@
/*
* 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.
*/
// 包声明,表明该类属于 net.micode.notes.widget 包
package net.micode.notes.widget;
// 导入应用小部件管理器类,用于管理和更新应用小部件
import android.appwidget.AppWidgetManager;
// 导入 Android 上下文类,用于获取应用程序的环境信息
import android.content.Context;
// 导入应用资源类,用于引用应用内的资源
import net.micode.notes.R;
// 导入 Notes 类,用于引用笔记相关的常量和信息
import net.micode.notes.data.Notes;
// 导入资源解析工具类,用于解析资源
import net.micode.notes.tool.ResourceParser;
/**
* NoteWidgetProvider_2x NoteWidgetProvider
* 2x
*/
public class NoteWidgetProvider_2x extends NoteWidgetProvider {
/**
* update
* @param context
* @param appWidgetManager
* @param appWidgetIds ID
*/
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// 调用父类的 update 方法更新小部件
super.update(context, appWidgetManager, appWidgetIds);
}
/**
* 2x ID
* @return ID R.layout.widget_2x
*/
@Override
protected int getLayoutId() {
return R.layout.widget_2x;
}
/**
* ID 2x ID
* @param bgId ID
* @return ID ResourceParser.WidgetBgResources getWidget2xBgResource
*/
@Override
protected int getBgResourceId(int bgId) {
return ResourceParser.WidgetBgResources.getWidget2xBgResource(bgId);
}
/**
* 2x
* @return Notes.TYPE_WIDGET_2X
*/
@Override
protected int getWidgetType() {
return Notes.TYPE_WIDGET_2X;
}
}

@ -0,0 +1,78 @@
/*
* 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.
*/
// 声明类所在的包
package net.micode.notes.widget;
// 导入 AppWidgetManager 类,用于管理和更新应用小部件
import android.appwidget.AppWidgetManager;
// 导入 Context 类,提供应用程序的全局信息和资源访问
import android.content.Context;
// 导入应用的资源类,用于访问应用的资源,如布局、字符串等
import net.micode.notes.R;
// 导入 Notes 类,包含笔记相关的常量和定义
import net.micode.notes.data.Notes;
// 导入 ResourceParser 类,用于解析资源
import net.micode.notes.tool.ResourceParser;
/**
* NoteWidgetProvider_4x NoteWidgetProvider 4x
*/
public class NoteWidgetProvider_4x extends NoteWidgetProvider {
/**
*
*
* @param context 访
* @param appWidgetManager
* @param appWidgetIds ID
*/
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
// 调用父类的 update 方法来执行实际的小部件更新操作
super.update(context, appWidgetManager, appWidgetIds);
}
/**
* 4x ID
*
* @return 4x ID R.layout.widget_4x
*/
protected int getLayoutId() {
return R.layout.widget_4x;
}
/**
* ID 4x ID
*
* @param bgId ID
* @return ID 4x ID
*/
@Override
protected int getBgResourceId(int bgId) {
return ResourceParser.WidgetBgResources.getWidget4xBgResource(bgId);
}
/**
* 4x
*
* @return 4x Notes.TYPE_WIDGET_4X
*/
@Override
protected int getWidgetType() {
return Notes.TYPE_WIDGET_4X;
}
}
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