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//表示在哪个包，依赖关系
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package net.micode.notes.data;
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//uri是统一资源标识符，涉及到安卓权限
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import android.net.Uri;
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//Notes 类中定义了很多常量，这些常量大多是int型和string型
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public class Notes {
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// 定义了一个权限名，这里是为了符合Uri的格式而定义的
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public static final
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String AUTHORITY = "micode_notes";
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// 设置标签，表示APP的名称是Notes
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public static final String TAG = "Notes";
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//以下三个常量对NoteColumns.TYPE的值进行设置时会用到
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public static final int TYPE_NOTE = 0;
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public static final int TYPE_FOLDER = 1;
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public static final int TYPE_SYSTEM = 2;
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/**
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* Following IDs are system folders' identifiers
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* {@link Notes#ID_ROOT_FOLDER } is default folder
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* {@link Notes#ID_TEMPARAY_FOLDER } is for notes belonging no folder
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* {@link Notes#ID_CALL_RECORD_FOLDER} is to store call records
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*/
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//垃圾文件夹
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public static final int ID_ROOT_FOLDER = 0;
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//临时警报
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public static final int ID_TEMPARAY_FOLDER = -1;
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//通话记录文件夹
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public static final int ID_CALL_RECORD_FOLDER = -2;
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//垃圾文件夹3
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public static final int ID_TRASH_FOLER = -3;
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//定义string字符串
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public static final String INTENT_EXTRA_ALERT_DATE =
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"net.micode.notes.alert_date";
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public static final String INTENT_EXTRA_BACKGROUND_ID =
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"net.micode.notes.background_color_id";
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public static final String INTENT_EXTRA_WIDGET_ID =
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"net.micode.notes.widget_id";
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public static final String INTENT_EXTRA_WIDGET_TYPE =
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"net.micode.notes.widget_type";
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public static final String INTENT_EXTRA_FOLDER_ID =
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"net.micode.notes.folder_id";
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public static final String INTENT_EXTRA_CALL_DATE =
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"net.micode.notes.call_date";
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//定义查询便签和指针
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public static final int TYPE_WIDGET_INVALIDE = -1;
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public static final int TYPE_WIDGET_2X = 0;
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public static final int TYPE_WIDGET_4X = 1;
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//DataContants类：存放textnotes和callnotes地址
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public static class DataConstants {
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public static final String NOTE = TextNote.CONTENT_ITEM_TYPE;
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public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE;
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}
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/**
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* Uri to query all notes and folders
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*/
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//创建URI访问实例parse中的参数分三部分，scheme（访问资源的命名机制），authority（存放资源的主机名），path（资源自身的名称）
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public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" +
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AUTHORITY + "/note");//定义查询便签和文件夹的指针。
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// public static final Uri my_URI = ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI , 10);
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/**
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* Uri to query data
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* 系统根据data查询所需的Uri常量
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*/
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public static final Uri CONTENT_DATA_URI = Uri.parse("content://" +
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AUTHORITY + "/data");//定义查找数据的指针。
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// 定义NoteColumns的常量,用于后面创建数据库的表头
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public interface NoteColumns {
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/**
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* The unique ID for a row
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* <P> Type: INTEGER (long) </P>
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*/
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public static final String ID = "_id";
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/**
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* The parent's id for note or folder
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* <P> Type: INTEGER (long) </P>
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*/
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//父节点的ID
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public static final String PARENT_ID = "parent_id";
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/**
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* Created data for note or folder
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* <P> Type: INTEGER (long) </P>
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* 创建时间
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*/
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public static final String CREATED_DATE = "created_date";
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/**
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* Latest modified date
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* <P> Type: INTEGER (long) </P>
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* 提醒时间
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*/
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public static final String MODIFIED_DATE = "modified_date";
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/**
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* Alert date
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* <P> Type: INTEGER (long) </P>
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* 提醒时间
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*/
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public static final String ALERTED_DATE = "alert_date";
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/**
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* Folder's name or text content of note
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* <P> Type: TEXT </P>
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* 文件夹名字或文件内容
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*/
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public static final String SNIPPET = "snippet";
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/**
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* Note's widget id
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* <P> Type: INTEGER (long) </P>
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* 小部件ID
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*/
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public static final String WIDGET_ID = "widget_id";
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/**
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* Note's widget type
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* <P> Type: INTEGER (long) </P>
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* 小部件类型
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*/
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public static final String WIDGET_TYPE = "widget_type";
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/**
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* Note's background color's id
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* <P> Type: INTEGER (long) </P>
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* 背景颜色ID
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*/
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public static final String BG_COLOR_ID = "bg_color_id";
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/**
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* For text note, it doesn't has attachment, for multi-media
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* note, it has at least one attachment
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* <P> Type: INTEGER </P>
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* 是否有附件
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*/
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public static final String HAS_ATTACHMENT = "has_attachment";
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/**
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* Folder's count of notes
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* <P> Type: INTEGER (long) </P>
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* 文件夹中标签的数量
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*/
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public static final String NOTES_COUNT = "notes_count";
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/**
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* The file type: folder or note
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* <P> Type: INTEGER </P>
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* 文件或者便签的类型
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*/
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public static final String TYPE = "type";
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/**
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* The last sync id
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* <P> Type: INTEGER (long) </P>
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* 最后一次同步的ID
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*/
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public static final String SYNC_ID = "sync_id";//同步
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/**
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* Sign to indicate local modified or not
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* <P> Type: INTEGER </P>
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* 标识本地是否修改
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*/
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public static final String LOCAL_MODIFIED = "local_modified";
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/**
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* Original parent id before moving into temporary folder
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* <P> Type : INTEGER </P>
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* 移动到当前文件夹之前的父文件夹ID
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*/
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public static final String ORIGIN_PARENT_ID = "origin_parent_id";
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/**
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* The gtask id
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* <P> Type : TEXT </P>
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* 后台任务ID
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*/
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public static final String GTASK_ID = "gtask_id";
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/**
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* The version code
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* <P> Type : INTEGER (long) </P>
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* 版本代号
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*/
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public static final String VERSION = "version";
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}//这些常量主要是定义便签的属性的。
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// 定义DataColumns的常量,用于后面创建数据库的表头
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public interface DataColumns {
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/**
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* The unique ID for a row
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* <P> Type: INTEGER (long) </P>
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* 一行独立的便签ID
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*/
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public static final String ID = "_id";
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/**
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* The MIME type of the item represented by this row.
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* <P> Type: Text </P>
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* MIME类型能包含视频、图像、文本、音频、应用程序等数据
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*/
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public static final String MIME_TYPE = "mime_type";
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/**
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* The reference id to note that this data belongs to
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* <P> Type: INTEGER (long) </P>
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* 便签ID
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*/
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public static final String NOTE_ID = "note_id";
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/**
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* Created data for note or folder
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* <P> Type: INTEGER (long) </P>
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* 创建时间
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*/
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public static final String CREATED_DATE = "created_date";
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/**
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* Latest modified date
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* <P> Type: INTEGER (long) </P>
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* 最后的修改日期
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*/
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public static final String MODIFIED_DATE = "modified_date";
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/**
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* Data's content
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* <P> Type: TEXT </P>
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* 数据的内容
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*/
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public static final String CONTENT = "content";
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/**
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* Generic data column, the meaning is {@link #MIMETYPE} specific,
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* <p>
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* used for
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* integer data type
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* <P> Type: INTEGER </P>
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*/
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public static final String DATA1 = "data1";
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/**
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* Generic data column, the meaning is {@link #MIMETYPE} specific,
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* <p>
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* used for
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* integer data type
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* <P> Type: INTEGER </P>
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*/
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public static final String DATA2 = "data2";
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/**
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* Generic data column, the meaning is {@link #MIMETYPE} specific,
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* <p>
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* used for
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* TEXT data type
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* <P> Type: TEXT </P>
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*/
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public static final String DATA3 = "data3";
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/**
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* Generic data column, the meaning is {@link #MIMETYPE} specific,
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* <p>
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* used for
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* TEXT data type
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* <P> Type: TEXT </P>
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*/
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public static final String DATA4 = "data4";
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/**
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* Generic data column, the meaning is {@link #MIMETYPE} specific,
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* <p>
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* used for
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* TEXT data type
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* <P> Type: TEXT </P>
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*/
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public static final String DATA5 = "data5";
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}//主要是定义存储便签内容数据的
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//文本数据（TextNote）通过关键字implements来实现接口，继承了DataColumns的所有定义常量
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public static final class TextNote implements DataColumns {
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/**
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* Mode to indicate the text in check list mode or not
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* <P> Type: Integer 1:check list mode 0: normal mode </P>
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*/
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public static final String MODE = DATA1;
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public static final int MODE_CHECK_LIST = 1;
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public static final String CONTENT_TYPE =
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"vnd.android.cursor.dir/text_note";
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public static final String CONTENT_ITEM_TYPE =
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"vnd.android.cursor.item/text_note";
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// 访问该content_provider的URI，parse方法返回的是一个URI类型。通过这个uri可以访问一个网络上或者本地上的资源
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public static final Uri CONTENT_URI = Uri.parse("content://" +
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AUTHORITY + "/text_note");
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}
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//文本内容的数据结构
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//TextNote作为DataColumns的子类，进行扩展，用于记录通话数据的表头
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public static final class CallNote implements DataColumns {
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/**
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* Call date for this record
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* <P> Type: INTEGER (long) </P>
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*/
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public static final String CALL_DATE = DATA1;
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/**
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* Phone number for this record
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* <P> Type: TEXT </P>
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*/
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public static final String PHONE_NUMBER = DATA3;
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public static final String CONTENT_TYPE =
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"vnd.android.cursor.dir/call_note";
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public static final String CONTENT_ITEM_TYPE =
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"vnd.android.cursor.item/call_note";
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public static final Uri CONTENT_URI = Uri.parse("content://" +
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AUTHORITY + "/call_note");
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}//电话内容的数据结构
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} |
