diff --git a/OLG--I'm OLD 8/新建 文本文档.txt b/OLG--I'm OLD 8/新建 文本文档.txt deleted file mode 100644 index e69de29..0000000 diff --git a/README.md b/README.md deleted file mode 100644 index 6050b2f..0000000 --- a/README.md +++ /dev/null @@ -1,2 +0,0 @@ -# xiaomibianqian -# 所以到底要干嘛？ diff --git a/doc/ReadMe.txt b/doc/ReadMe.txt deleted file mode 100644 index e69de29..0000000 diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Contact.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Contact.java index d97ac5d..6083afa 100644 --- a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Contact.java +++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Contact.java @@ -14,60 +14,72 @@ * limitations under the License. */ -package net.micode.notes.data; - -import android.content.Context; -import android.database.Cursor; -import android.provider.ContactsContract.CommonDataKinds.Phone; -import android.provider.ContactsContract.Data; -import android.telephony.PhoneNumberUtils; -import android.util.Log; - -import java.util.HashMap; - -public class Contact { - private static HashMap sContactCache; - private static final String TAG = "Contact"; - - 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 = '+')"; - - public static String getContact(Context context, String phoneNumber) { - if(sContactCache == null) { - sContactCache = new HashMap(); - } - - if(sContactCache.containsKey(phoneNumber)) { - return sContactCache.get(phoneNumber); - } - - String selection = CALLER_ID_SELECTION.replace("+", - PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); - Cursor cursor = context.getContentResolver().query( - Data.CONTENT_URI, - new String [] { Phone.DISPLAY_NAME }, - selection, - new String[] { phoneNumber }, - null); - - if (cursor != null && cursor.moveToFirst()) { - try { - String name = cursor.getString(0); - sContactCache.put(phoneNumber, name); - return name; - } catch (IndexOutOfBoundsException e) { - Log.e(TAG, " Cursor get string error " + e.toString()); - return null; - } finally { - cursor.close(); - } - } else { - Log.d(TAG, "No contact matched with number:" + phoneNumber); - return null; - } - } -} + package net.micode.notes.data; + + import android.content.Context; + + import android.database.Cursor; + import android.provider.ContactsContract.CommonDataKinds.Phone; + import android.provider.ContactsContract.Data; + import android.telephony.PhoneNumberUtils; + import android.util.Log; + + import java.util.HashMap; + //change + public class Contact { //联系人 + private static HashMap sContactCache; + private static final String TAG = "Contact"; + + // 定义字符串CALLER_ID_SELECTION + 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 = '+')"; + + // 获取联系人 + public static String getContact(Context context, String phoneNumber) { + if(sContactCache == null) { + sContactCache = new HashMap(); + } + + // 查找HashMap中是否已有phoneNumber信息 + if(sContactCache.containsKey(phoneNumber)) { + return sContactCache.get(phoneNumber); + } + + String selection = CALLER_ID_SELECTION.replace("+", + PhoneNumberUtils.toCallerIDMinMatch(phoneNumber)); + // 查找数据库中phoneNumber的信息 + Cursor cursor = context.getContentResolver().query( + Data.CONTENT_URI, + new String [] { Phone.DISPLAY_NAME }, + selection, + new String[] { phoneNumber }, + null); + + // 判定查询结果 + // moveToFirst()返回第一条 + if (cursor != null && cursor.moveToFirst()) { + try { + // 找到相关信息 + String name = cursor.getString(0); + sContactCache.put(phoneNumber, name); + return name; + // 异常 + } catch (IndexOutOfBoundsException e) { + Log.e(TAG, " Cursor get string error " + e.toString()); + return null; + } finally { + cursor.close(); + } + // 未找到相关信息 + } else { + Log.d(TAG, "No contact matched with number:" + phoneNumber); + return null; + } + } + } \ No newline at end of file diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Notes.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Notes.java index f240604..1cdfe5e 100644 --- a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Notes.java +++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/Notes.java @@ -15,15 +15,19 @@ */ package net.micode.notes.data; - + +import android.content.ContentUris; import android.net.Uri; +// Notes 类中定义了很多常量，这些常量大多是int型和string型 public class Notes { public static final String AUTHORITY = "micode_notes"; public static final String TAG = "Notes"; + + //以下三个常量对NoteColumns.TYPE的值进行设置时会用到 public static final int TYPE_NOTE = 0; public static final int TYPE_FOLDER = 1; public static final int TYPE_SYSTEM = 2; - + /** * Following IDs are system folders' identifiers * {@link Notes#ID_ROOT_FOLDER } is default folder @@ -34,246 +38,282 @@ public class Notes { public static final int ID_TEMPARAY_FOLDER = -1; public static final int ID_CALL_RECORD_FOLDER = -2; public static final int ID_TRASH_FOLER = -3; - - public static final String INTENT_EXTRA_ALERT_DATE = "net.micode.notes.alert_date"; - public static final String INTENT_EXTRA_BACKGROUND_ID = "net.micode.notes.background_color_id"; - public static final String INTENT_EXTRA_WIDGET_ID = "net.micode.notes.widget_id"; - public static final String INTENT_EXTRA_WIDGET_TYPE = "net.micode.notes.widget_type"; - public static final String INTENT_EXTRA_FOLDER_ID = "net.micode.notes.folder_id"; - public static final String INTENT_EXTRA_CALL_DATE = "net.micode.notes.call_date"; - + + public static final String INTENT_EXTRA_ALERT_DATE = + +"net.micode.notes.alert_date"; + public static final String INTENT_EXTRA_BACKGROUND_ID = + +"net.micode.notes.background_color_id"; + public static final String INTENT_EXTRA_WIDGET_ID = + +"net.micode.notes.widget_id"; + public static final String INTENT_EXTRA_WIDGET_TYPE = + +"net.micode.notes.widget_type"; + public static final String INTENT_EXTRA_FOLDER_ID = + +"net.micode.notes.folder_id"; + public static final String INTENT_EXTRA_CALL_DATE = + +"net.micode.notes.call_date"; + public static final int TYPE_WIDGET_INVALIDE = -1; public static final int TYPE_WIDGET_2X = 0; public static final int TYPE_WIDGET_4X = 1; - + public static class DataConstants { public static final String NOTE = TextNote.CONTENT_ITEM_TYPE; public static final String CALL_NOTE = CallNote.CONTENT_ITEM_TYPE; } - + /** * Uri to query all notes and folders */ - public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note"); - + public static final Uri CONTENT_NOTE_URI = Uri.parse("content://" + + +AUTHORITY + "/note");//定义查询便签和文件夹的指针。 + +// public static final Uri my_URI = ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI , 10); + /** * Uri to query data */ - public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data"); - + public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + + +AUTHORITY + "/data");//定义查找数据的指针。 + + // 定义NoteColumns的常量,用于后面创建数据库的表头 public interface NoteColumns { /** * The unique ID for a row *

Type: INTEGER (long)

*/ public static final String ID = "_id"; - + /** * The parent's id for note or folder *

Type: INTEGER (long)

*/ - public static final String PARENT_ID = "parent_id"; - + public static final String PARENT_ID = "parent_id";//为什么会有parent_id + /** * Created data for note or folder *

Type: INTEGER (long)

*/ public static final String CREATED_DATE = "created_date"; - + /** * Latest modified date *

Type: INTEGER (long)

*/ public static final String MODIFIED_DATE = "modified_date"; - - + + /** * Alert date *

Type: INTEGER (long)

*/ public static final String ALERTED_DATE = "alert_date"; - + /** * Folder's name or text content of note *

Type: TEXT

*/ public static final String SNIPPET = "snippet"; - + /** * Note's widget id *

Type: INTEGER (long)

*/ public static final String WIDGET_ID = "widget_id"; - + /** * Note's widget type *

Type: INTEGER (long)

*/ public static final String WIDGET_TYPE = "widget_type"; - + /** * Note's background color's id *

Type: INTEGER (long)

*/ public static final String BG_COLOR_ID = "bg_color_id"; - + /** * For text note, it doesn't has attachment, for multi-media * note, it has at least one attachment *

Type: INTEGER

*/ public static final String HAS_ATTACHMENT = "has_attachment"; - + /** * Folder's count of notes *

Type: INTEGER (long)

*/ public static final String NOTES_COUNT = "notes_count"; - + /** * The file type: folder or note *

Type: INTEGER

*/ public static final String TYPE = "type"; - + /** * The last sync id *

Type: INTEGER (long)

*/ - public static final String SYNC_ID = "sync_id"; - + public static final String SYNC_ID = "sync_id";//同步 + /** * Sign to indicate local modified or not *

Type: INTEGER

*/ public static final String LOCAL_MODIFIED = "local_modified"; - + /** * Original parent id before moving into temporary folder *

Type : INTEGER

*/ public static final String ORIGIN_PARENT_ID = "origin_parent_id"; - + /** * The gtask id *

Type : TEXT

*/ public static final String GTASK_ID = "gtask_id"; - + /** * The version code *

Type : INTEGER (long)

*/ public static final String VERSION = "version"; - } - + }//这些常量主要是定义便签的属性的。 + + // 定义DataColumns的常量,用于后面创建数据库的表头 public interface DataColumns { /** * The unique ID for a row *

Type: INTEGER (long)

*/ public static final String ID = "_id"; - + /** * The MIME type of the item represented by this row. *

Type: Text

*/ public static final String MIME_TYPE = "mime_type"; - + /** * The reference id to note that this data belongs to *

Type: INTEGER (long)

*/ public static final String NOTE_ID = "note_id"; - + /** * Created data for note or folder *

Type: INTEGER (long)

*/ public static final String CREATED_DATE = "created_date"; - + /** * Latest modified date *

Type: INTEGER (long)

*/ public static final String MODIFIED_DATE = "modified_date"; - + /** * Data's content *

Type: TEXT

*/ public static final String CONTENT = "content"; - - + + /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for + * Generic data column, the meaning is {@link #MIMETYPE} specific, +used for * integer data type *

Type: INTEGER

*/ public static final String DATA1 = "data1"; - + /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for + * Generic data column, the meaning is {@link #MIMETYPE} specific, +used for * integer data type *

Type: INTEGER

*/ public static final String DATA2 = "data2"; - + /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for + * Generic data column, the meaning is {@link #MIMETYPE} specific, +used for * TEXT data type *

Type: TEXT

*/ public static final String DATA3 = "data3"; - + /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for + * Generic data column, the meaning is {@link #MIMETYPE} specific, +used for * TEXT data type *

Type: TEXT

*/ public static final String DATA4 = "data4"; - + /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for + * Generic data column, the meaning is {@link #MIMETYPE} specific, +used for * TEXT data type *

Type: TEXT

*/ public static final String DATA5 = "data5"; - } - + }//主要是定义存储便签内容数据的 public static final class TextNote implements DataColumns { /** * Mode to indicate the text in check list mode or not *

Type: Integer 1:check list mode 0: normal mode

*/ public static final String MODE = DATA1; - + public static final int MODE_CHECK_LIST = 1; - - public static final String CONTENT_TYPE = "vnd.android.cursor.dir/text_note"; - - public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/text_note"; - - public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); - } - + + public static final String CONTENT_TYPE = + +"vnd.android.cursor.dir/text_note"; + + public static final String CONTENT_ITEM_TYPE = + +"vnd.android.cursor.item/text_note"; + + public static final Uri CONTENT_URI = Uri.parse("content://" + + +AUTHORITY + "/text_note"); + }//文本内容的数据结构 + public static final class CallNote implements DataColumns { /** * Call date for this record *

Type: INTEGER (long)

*/ public static final String CALL_DATE = DATA1; - + /** * Phone number for this record *

Type: TEXT

*/ public static final String PHONE_NUMBER = DATA3; - - public static final String CONTENT_TYPE = "vnd.android.cursor.dir/call_note"; - - public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/call_note"; - - public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/call_note"); - } -} + + public static final String CONTENT_TYPE = + +"vnd.android.cursor.dir/call_note"; + + public static final String CONTENT_ITEM_TYPE = + +"vnd.android.cursor.item/call_note"; + + public static final Uri CONTENT_URI = Uri.parse("content://" + + +AUTHORITY + "/call_note"); + }//电话内容的数据结构 +} \ No newline at end of file diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java index ffe5d57..531e473 100644 --- a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java +++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java @@ -15,33 +15,33 @@ */ package net.micode.notes.data; - -import android.content.ContentValues; -import android.content.Context; -import android.database.sqlite.SQLiteDatabase; -import android.database.sqlite.SQLiteOpenHelper; + +import android.content.ContentValues;//就是用于保存一些数据（string boolean byte double float int long short ...）信息，这些信息可以被数据库操作时使用。 +import android.content.Context;//加载和访问资源。（android中主要是这两个功能，但是这里具体不清楚） +import android.database.sqlite.SQLiteDatabase;//主要提供了对应于添加、删除、更新、查询的操作方法： insert()、delete()、update()和query()。配合content.values +import android.database.sqlite.SQLiteOpenHelper;//用来管理数据的创建和版本更新 import android.util.Log; - + import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.DataConstants; import net.micode.notes.data.Notes.NoteColumns; - - +//数据库操作，用SQLOpenhelper,对一些note和文件进行数据库的操作，比如删除文件后，将文件里的note也相应删除 + public class NotesDatabaseHelper extends SQLiteOpenHelper { private static final String DB_NAME = "note.db"; - + private static final int DB_VERSION = 4; - - public interface TABLE { + + public interface TABLE { //接口，分成note和data，在后面的程序里分别使用过 public static final String NOTE = "note"; - + public static final String DATA = "data"; } - + private static final String TAG = "NotesDatabaseHelper"; - + private static NotesDatabaseHelper mInstance; - + private static final String CREATE_NOTE_TABLE_SQL = "CREATE TABLE " + TABLE.NOTE + "(" + NoteColumns.ID + " INTEGER PRIMARY KEY," + @@ -61,8 +61,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { NoteColumns.ORIGIN_PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + NoteColumns.GTASK_ID + " TEXT NOT NULL DEFAULT ''," + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + - ")"; - + ")";//数据库中需要存储的项目的名称，就相当于创建一个表格的表头的内容。 + private static final String CREATE_DATA_TABLE_SQL = "CREATE TABLE " + TABLE.DATA + "(" + DataColumns.ID + " INTEGER PRIMARY KEY," + @@ -76,12 +76,12 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { DataColumns.DATA3 + " TEXT NOT NULL DEFAULT ''," + DataColumns.DATA4 + " TEXT NOT NULL DEFAULT ''," + DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + - ")"; - + ")";//和上面的功能一样，主要是存储的项目不同 + private static final String CREATE_DATA_NOTE_ID_INDEX_SQL = "CREATE INDEX IF NOT EXISTS note_id_index ON " + - TABLE.DATA + "(" + DataColumns.NOTE_ID + ");"; - + TABLE.DATA + "(" + DataColumns.NOTE_ID + ");";//存储便签编号的一个数据表格 + /** * Increase folder's note count when move note to the folder */ @@ -92,8 +92,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " UPDATE " + TABLE.NOTE + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + - " END"; - + " END";//在文件夹中移入一个Note之后需要更改的数据的表格。 + /** * Decrease folder's note count when move note from folder */ @@ -105,8 +105,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + " AND " + NoteColumns.NOTES_COUNT + ">0" + ";" + - " END"; - + " END";//在文件夹中移出一个Note之后需要更改的数据的表格。 + /** * Increase folder's note count when insert new note to the folder */ @@ -117,8 +117,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " UPDATE " + TABLE.NOTE + " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + " + 1" + " WHERE " + NoteColumns.ID + "=new." + NoteColumns.PARENT_ID + ";" + - " END"; - + " END";//在文件夹中插入一个Note之后需要更改的数据的表格。 + /** * Decrease folder's note count when delete note from the folder */ @@ -130,8 +130,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " SET " + NoteColumns.NOTES_COUNT + "=" + NoteColumns.NOTES_COUNT + "-1" + " WHERE " + NoteColumns.ID + "=old." + NoteColumns.PARENT_ID + " AND " + NoteColumns.NOTES_COUNT + ">0;" + - " END"; - + " END";//在文件夹中删除一个Note之后需要更改的数据的表格。 + /** * Update note's content when insert data with type {@link DataConstants#NOTE} */ @@ -143,8 +143,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " UPDATE " + TABLE.NOTE + " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + - " END"; - + " END";//在文件夹中对一个Note导入新的数据之后需要更改的数据的表格。 + /** * Update note's content when data with {@link DataConstants#NOTE} type has changed */ @@ -156,8 +156,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " UPDATE " + TABLE.NOTE + " SET " + NoteColumns.SNIPPET + "=new." + DataColumns.CONTENT + " WHERE " + NoteColumns.ID + "=new." + DataColumns.NOTE_ID + ";" + - " END"; - + " END";//Note数据被修改后需要更改的数据的表格。 + /** * Update note's content when data with {@link DataConstants#NOTE} type has deleted */ @@ -169,8 +169,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " UPDATE " + TABLE.NOTE + " SET " + NoteColumns.SNIPPET + "=''" + " WHERE " + NoteColumns.ID + "=old." + DataColumns.NOTE_ID + ";" + - " END"; - + " END";//Note数据被删除后需要更改的数据的表格。 + /** * Delete datas belong to note which has been deleted */ @@ -180,8 +180,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " BEGIN" + " DELETE FROM " + TABLE.DATA + " WHERE " + DataColumns.NOTE_ID + "=old." + NoteColumns.ID + ";" + - " END"; - + " END";//删除已删除的便签的数据后需要更改的数据的表格。 + /** * Delete notes belong to folder which has been deleted */ @@ -191,8 +191,8 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " BEGIN" + " DELETE FROM " + TABLE.NOTE + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + - " END"; - + " END";//删除已删除的文件夹的便签后需要更改的数据的表格。 + /** * Move notes belong to folder which has been moved to trash folder */ @@ -204,19 +204,19 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " UPDATE " + TABLE.NOTE + " SET " + NoteColumns.PARENT_ID + "=" + Notes.ID_TRASH_FOLER + " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + - " END"; - + " END";//还原垃圾桶中便签后需要更改的数据的表格。 + public NotesDatabaseHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); - } - + }//构造函数，传入数据库的名称和版本 + public void createNoteTable(SQLiteDatabase db) { db.execSQL(CREATE_NOTE_TABLE_SQL); reCreateNoteTableTriggers(db); createSystemFolder(db); Log.d(TAG, "note table has been created"); - } - + }//创建表格（用来存储标签属性） + private void reCreateNoteTableTriggers(SQLiteDatabase db) { db.execSQL("DROP TRIGGER IF EXISTS increase_folder_count_on_update"); db.execSQL("DROP TRIGGER IF EXISTS decrease_folder_count_on_update"); @@ -225,7 +225,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { 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"); - + 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); @@ -233,18 +233,19 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { 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); - } - + }//execSQL是数据库操作的API，主要是更改行为的SQL语句。 + //在这里主要是用来重新创建上述定义的表格用的，先删除原来有的数据库的触发器再重新创建新的数据库 + private void createSystemFolder(SQLiteDatabase db) { ContentValues values = new ContentValues(); - + /** * call record foler for call notes */ values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - + /** * root folder which is default folder */ @@ -252,7 +253,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - + /** * temporary folder which is used for moving note */ @@ -260,7 +261,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - + /** * create trash folder */ @@ -268,78 +269,80 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - } - + }//创建几个系统文件夹 + public void createDataTable(SQLiteDatabase db) { db.execSQL(CREATE_DATA_TABLE_SQL); reCreateDataTableTriggers(db); db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); Log.d(TAG, "data table has been created"); - } - + }//创建表格（用来存储标签内容） + private void reCreateDataTableTriggers(SQLiteDatabase db) { 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"); - + 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); - } - + }//同上面的execSQL + static synchronized NotesDatabaseHelper getInstance(Context context) { if (mInstance == null) { mInstance = new NotesDatabaseHelper(context); } return mInstance; - } - + }//上网查是为解决同一时刻只能有一个线程执行. + //在写程序库代码时，有时有一个类需要被所有的其它类使用， + //但又要求这个类只能被实例化一次，是个服务类，定义一次，其它类使用同一个这个类的实例 + @Override public void onCreate(SQLiteDatabase db) { createNoteTable(db); createDataTable(db); - } - + }//实现两个表格（上面创建的两个表格） + @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { boolean reCreateTriggers = false; boolean skipV2 = false; - + if (oldVersion == 1) { upgradeToV2(db); skipV2 = true; // this upgrade including the upgrade from v2 to v3 oldVersion++; } - + if (oldVersion == 2 && !skipV2) { upgradeToV3(db); reCreateTriggers = true; oldVersion++; } - + if (oldVersion == 3) { upgradeToV4(db); oldVersion++; } - + if (reCreateTriggers) { reCreateNoteTableTriggers(db); reCreateDataTableTriggers(db); } - + if (oldVersion != newVersion) { throw new IllegalStateException("Upgrade notes database to version " + newVersion + "fails"); } - } - + }//数据库版本的更新（数据库内容的更改） + private void upgradeToV2(SQLiteDatabase db) { db.execSQL("DROP TABLE IF EXISTS " + TABLE.NOTE); db.execSQL("DROP TABLE IF EXISTS " + TABLE.DATA); createNoteTable(db); createDataTable(db); - } - + }//更新到V2版本 + private void upgradeToV3(SQLiteDatabase db) { // drop unused triggers db.execSQL("DROP TRIGGER IF EXISTS update_note_modified_date_on_insert"); @@ -353,10 +356,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); - } - + }//更新到V3版本 + private void upgradeToV4(SQLiteDatabase db) { db.execSQL("ALTER TABLE " + TABLE.NOTE + " ADD COLUMN " + NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0"); - } + }//更新到V4版本 } diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesProvider.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesProvider.java index edb0a60..1ed1bd8 100644 --- a/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesProvider.java +++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/data/NotesProvider.java @@ -15,8 +15,7 @@ */ package net.micode.notes.data; - - + import android.app.SearchManager; import android.content.ContentProvider; import android.content.ContentUris; @@ -28,30 +27,38 @@ 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; - - +//为存储和获取数据提供接口。可以在不同的应用程序之间共享数据 +//ContentProvider提供的方法 +//query：查询 +//insert：插入 +//update：更新 +//delete：删除 +//getType：得到数据类型 public class NotesProvider extends ContentProvider { + // UriMatcher用于匹配Uri private static final UriMatcher mMatcher; - + private NotesDatabaseHelper mHelper; - + 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_SEARCH = 5; private static final int URI_SEARCH_SUGGEST = 6; - + static { + // 创建UriMatcher时，调用UriMatcher(UriMatcher.NO_MATCH)表示不匹配任何路径的返回码 mMatcher = new UriMatcher(UriMatcher.NO_MATCH); + // 把需要匹配Uri路径全部给注册上 mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); @@ -60,11 +67,12 @@ public class NotesProvider extends ContentProvider { 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' 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. */ + // 声明 NOTES_SEARCH_PROJECTION 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 + "," @@ -72,26 +80,32 @@ public class NotesProvider extends ContentProvider { + 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; - + // 声明NOTES_SNIPPET_SEARCH_QUERY 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; - + @Override + // Context只有在onCreate()中才被初始化 + // 对mHelper进行实例化 public boolean onCreate() { mHelper = NotesDatabaseHelper.getInstance(getContext()); return true; } - + @Override + // 查询uri在数据库中对应的位置 public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { Cursor c = null; + // 获取可读数据库 SQLiteDatabase db = mHelper.getReadableDatabase(); String id = null; + // 匹配查找uri switch (mMatcher.match(uri)) { + // 对于不同的匹配值，在数据库中查找相应的条目 case URI_NOTE: c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, sortOrder); @@ -113,23 +127,26 @@ public class NotesProvider extends ContentProvider { case URI_SEARCH: case URI_SEARCH_SUGGEST: if (sortOrder != null || projection != null) { + // 不合法的参数异常 throw new IllegalArgumentException( "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query"); } - + String searchString = null; if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) { if (uri.getPathSegments().size() > 1) { + // getPathSegments()方法得到一个String的List， + // 在uri.getPathSegments().get(1)为第2个元素 searchString = uri.getPathSegments().get(1); } } else { searchString = uri.getQueryParameter("pattern"); } - + if (TextUtils.isEmpty(searchString)) { return null; } - + try { searchString = String.format("%%%s%%", searchString); c = db.rawQuery(NOTES_SNIPPET_SEARCH_QUERY, @@ -139,6 +156,7 @@ public class NotesProvider extends ContentProvider { } break; default: + // 抛出异常 throw new IllegalArgumentException("Unknown URI " + uri); } if (c != null) { @@ -146,15 +164,19 @@ public class NotesProvider extends ContentProvider { } return c; } - + @Override + // 插入一个uri public Uri insert(Uri uri, ContentValues values) { + // 获得可写的数据库 SQLiteDatabase db = mHelper.getWritableDatabase(); long dataId = 0, noteId = 0, insertedId = 0; switch (mMatcher.match(uri)) { + // 新增一个条目 case URI_NOTE: insertedId = noteId = db.insert(TABLE.NOTE, null, values); break; + // 如果存在，查找NOTE_ID case URI_DATA: if (values.containsKey(DataColumns.NOTE_ID)) { noteId = values.getAsLong(DataColumns.NOTE_ID); @@ -163,28 +185,33 @@ public class NotesProvider extends ContentProvider { } insertedId = dataId = db.insert(TABLE.DATA, null, values); break; - default: + default: throw new IllegalArgumentException("Unknown URI " + uri); } // Notify the note uri + // notifyChange获得一个ContextResolver对象并且更新里面的内容 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); } - + + // 返回插入的uri的路径 return ContentUris.withAppendedId(uri, insertedId); } - + @Override + // 删除一个uri public int delete(Uri uri, String selection, String[] selectionArgs) { + //Uri代表要操作的数据，Android上可用的每种资源 -包括 图像、视频片段、音频资源等都可以用Uri来表示。 int count = 0; String id = null; + // 获得可写的数据库 SQLiteDatabase db = mHelper.getWritableDatabase(); boolean deleteData = false; switch (mMatcher.match(uri)) { @@ -226,8 +253,9 @@ public class NotesProvider extends ContentProvider { } return count; } - + @Override + // 更新一个uri public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { int count = 0; String id = null; @@ -257,7 +285,7 @@ public class NotesProvider extends ContentProvider { default: throw new IllegalArgumentException("Unknown URI " + uri); } - + if (count > 0) { if (updateData) { getContext().getContentResolver().notifyChange(Notes.CONTENT_NOTE_URI, null); @@ -266,11 +294,13 @@ public class NotesProvider extends ContentProvider { } return count; } - + + // 将字符串解析成规定格式 private String parseSelection(String selection) { return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); } - + + //增加一个noteVersion private void increaseNoteVersion(long id, String selection, String[] selectionArgs) { StringBuilder sql = new StringBuilder(120); sql.append("UPDATE "); @@ -278,7 +308,7 @@ public class NotesProvider extends ContentProvider { sql.append(" SET "); sql.append(NoteColumns.VERSION); sql.append("=" + NoteColumns.VERSION + "+1 "); - + if (id > 0 || !TextUtils.isEmpty(selection)) { sql.append(" WHERE "); } @@ -292,14 +322,15 @@ public class NotesProvider extends ContentProvider { } sql.append(selectString); } - + + // execSQL()方法可以执行insert、delete、update和CREATE TABLE之类有更改行为的SQL语句 mHelper.getWritableDatabase().execSQL(sql.toString()); } - + @Override public String getType(Uri uri) { // TODO Auto-generated method stub return null; } - -} + +} \ No newline at end of file diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java index 39f6ec4..e383ec3 100644 --- a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java +++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/BackupUtils.java @@ -35,56 +35,60 @@ import java.io.FileOutputStream; import java.io.IOException; import java.io.PrintStream; - + public class BackupUtils { - private static final String TAG = "BackupUtils"; + private static final String TAG = "BackupUtils"; // Singleton stuff - private static BackupUtils sInstance; - + private static BackupUtils sInstance; + public static synchronized BackupUtils getInstance(Context context) { + //ynchronized 关键字，代表这个方法加锁,相当于不管哪一个线程（例如线程A） + //运行到这个方法时,都要检查有没有其它线程B（或者C、 D等）正在用这个方法(或者该类的其他同步方法)，有的话要等正在使用synchronized方法的线程B（或者C 、D）运行完这个方法后再运行此线程A,没有的话,锁定调用者,然后直接运行。 + //它包括两种用法：synchronized 方法和 synchronized 块。 if (sInstance == null) { + //如果当前备份不存在，则新声明一个 sInstance = new BackupUtils(context); } return sInstance; } - + /** * Following states are signs to represents backup or restore * status */ - // Currently, the sdcard is not mounted - public static final int STATE_SD_CARD_UNMOUONTED = 0; - // The backup file not exist + // Currently, the sdcard is not mounted SD卡没有被装入手机 + public static final int STATE_SD_CARD_UNMOUONTED = 0; + // The backup file not exist 备份文件夹不存在 public static final int STATE_BACKUP_FILE_NOT_EXIST = 1; - // The data is not well formated, may be changed by other programs + // The data is not well formated, may be changed by other programs 数据已被破坏，可能被修改 public static final int STATE_DATA_DESTROIED = 2; - // Some run-time exception which causes restore or backup fails + // Some run-time exception which causes restore or backup fails 超时异常 public static final int STATE_SYSTEM_ERROR = 3; - // Backup or restore success + // Backup or restore success 成功存储 public static final int STATE_SUCCESS = 4; - + private TextExport mTextExport; - - private BackupUtils(Context context) { + + private BackupUtils(Context context) { //初始化函数 mTextExport = new TextExport(context); } - - private static boolean externalStorageAvailable() { + + private static boolean externalStorageAvailable() { //外部存储功能是否可用 return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()); } - + public int exportToText() { return mTextExport.exportToText(); } - + public String getExportedTextFileName() { return mTextExport.mFileName; } - + public String getExportedTextFileDir() { return mTextExport.mFileDirectory; } - + private static class TextExport { private static final String[] NOTE_PROJECTION = { NoteColumns.ID, @@ -92,13 +96,13 @@ public class BackupUtils { NoteColumns.SNIPPET, NoteColumns.TYPE }; - + private static final int NOTE_COLUMN_ID = 0; - + private static final int NOTE_COLUMN_MODIFIED_DATE = 1; - + private static final int NOTE_COLUMN_SNIPPET = 2; - + private static final String[] DATA_PROJECTION = { DataColumns.CONTENT, DataColumns.MIME_TYPE, @@ -107,71 +111,71 @@ public class BackupUtils { DataColumns.DATA3, DataColumns.DATA4, }; - + private static final int DATA_COLUMN_CONTENT = 0; - + private static final int DATA_COLUMN_MIME_TYPE = 1; - + private static final int DATA_COLUMN_CALL_DATE = 2; - + private static final int DATA_COLUMN_PHONE_NUMBER = 4; - + private final String [] TEXT_FORMAT; private static final int FORMAT_FOLDER_NAME = 0; private static final int FORMAT_NOTE_DATE = 1; private static final int FORMAT_NOTE_CONTENT = 2; - + private Context mContext; private String mFileName; private String mFileDirectory; - + public TextExport(Context context) { TEXT_FORMAT = context.getResources().getStringArray(R.array.format_for_exported_note); mContext = context; - mFileName = ""; + mFileName = ""; //为什么为空? mFileDirectory = ""; } - - private String getFormat(int id) { + + private String getFormat(int id) { //获取文本的组成部分 return TEXT_FORMAT[id]; } - + /** * Export the folder identified by folder id to text */ - private void exportFolderToText(String folderId, PrintStream ps) { - // Query notes belong to this folder + private void exportFolderToText(String folderId, PrintStream ps) { + // Query notes belong to this folder 通过查询parent id是文件夹id的note来选出制定ID文件夹下的Note Cursor notesCursor = mContext.getContentResolver().query(Notes.CONTENT_NOTE_URI, NOTE_PROJECTION, NoteColumns.PARENT_ID + "=?", new String[] { folderId }, null); - - if (notesCursor != null) { + + if (notesCursor != null) { if (notesCursor.moveToFirst()) { do { - // Print note's last modified date + // Print note's last modified date ps里面保存有这份note的日期 ps.println(String.format(getFormat(FORMAT_NOTE_DATE), DateFormat.format( mContext.getString(R.string.format_datetime_mdhm), notesCursor.getLong(NOTE_COLUMN_MODIFIED_DATE)))); // Query data belong to this note String noteId = notesCursor.getString(NOTE_COLUMN_ID); - exportNoteToText(noteId, ps); + exportNoteToText(noteId, ps); //将文件导出到text } while (notesCursor.moveToNext()); } notesCursor.close(); } } - + /** * Export note identified by id to a print stream */ - private void exportNoteToText(String noteId, PrintStream ps) { + private void exportNoteToText(String noteId, PrintStream ps) { Cursor dataCursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] { noteId }, null); - - if (dataCursor != null) { + + if (dataCursor != null) { //利用光标来扫描内容，区别为callnote和note两种，靠ps.printline输出 if (dataCursor.moveToFirst()) { do { String mimeType = dataCursor.getString(DATA_COLUMN_MIME_TYPE); @@ -180,8 +184,8 @@ public class BackupUtils { String phoneNumber = dataCursor.getString(DATA_COLUMN_PHONE_NUMBER); long callDate = dataCursor.getLong(DATA_COLUMN_CALL_DATE); String location = dataCursor.getString(DATA_COLUMN_CONTENT); - - if (!TextUtils.isEmpty(phoneNumber)) { + + if (!TextUtils.isEmpty(phoneNumber)) { //判断是否为空字符 ps.println(String.format(getFormat(FORMAT_NOTE_CONTENT), phoneNumber)); } @@ -214,29 +218,29 @@ public class BackupUtils { Log.e(TAG, e.toString()); } } - + /** * Note will be exported as text which is user readable */ - public int exportToText() { + public int exportToText() { //总函数，调用上面的exportFolder和exportNote if (!externalStorageAvailable()) { Log.d(TAG, "Media was not mounted"); return STATE_SD_CARD_UNMOUONTED; } - + PrintStream ps = getExportToTextPrintStream(); if (ps == null) { Log.e(TAG, "get print stream error"); return STATE_SYSTEM_ERROR; } - // First export folder and its notes + // First export folder and its notes 导出文件夹，就是导出里面包含的便签 Cursor folderCursor = mContext.getContentResolver().query( Notes.CONTENT_NOTE_URI, NOTE_PROJECTION, "(" + NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + ") OR " + NoteColumns.ID + "=" + Notes.ID_CALL_RECORD_FOLDER, null, null); - + if (folderCursor != null) { if (folderCursor.moveToFirst()) { do { @@ -256,14 +260,14 @@ public class BackupUtils { } folderCursor.close(); } - - // Export notes in root's folder + + // Export notes in root's folder 将根目录里的便签导出（由于不属于任何文件夹，因此无法通过文件夹导出来实现这一部分便签的导出） Cursor noteCursor = mContext.getContentResolver().query( Notes.CONTENT_NOTE_URI, NOTE_PROJECTION, NoteColumns.TYPE + "=" + +Notes.TYPE_NOTE + " AND " + NoteColumns.PARENT_ID + "=0", null, null); - + if (noteCursor != null) { if (noteCursor.moveToFirst()) { do { @@ -278,14 +282,14 @@ public class BackupUtils { noteCursor.close(); } ps.close(); - + return STATE_SUCCESS; } - + /** * Get a print stream pointed to the file {@generateExportedTextFile} */ - private PrintStream getExportToTextPrintStream() { + private PrintStream getExportToTextPrintStream() { File file = generateFileMountedOnSDcard(mContext, R.string.file_path, R.string.file_name_txt_format); if (file == null) { @@ -297,7 +301,7 @@ public class BackupUtils { PrintStream ps = null; try { FileOutputStream fos = new FileOutputStream(file); - ps = new PrintStream(fos); + ps = new PrintStream(fos); //将ps输出流输出到特定的文件，目的就是导出到文件，而不是直接输出 } catch (FileNotFoundException e) { e.printStackTrace(); return null; @@ -308,22 +312,22 @@ public class BackupUtils { return ps; } } - + /** * Generate the text file to store imported data */ private static File generateFileMountedOnSDcard(Context context, int filePathResId, int fileNameFormatResId) { StringBuilder sb = new StringBuilder(); - sb.append(Environment.getExternalStorageDirectory()); - sb.append(context.getString(filePathResId)); - File filedir = new File(sb.toString()); + sb.append(Environment.getExternalStorageDirectory()); //外部（SD卡）的存储路径 + sb.append(context.getString(filePathResId)); //文件的存储路径 + File filedir = new File(sb.toString()); //filedir应该就是用来存储路径信息 sb.append(context.getString( fileNameFormatResId, DateFormat.format(context.getString(R.string.format_date_ymd), System.currentTimeMillis()))); File file = new File(sb.toString()); - - try { + + try { //如果这些文件不存在，则新建 if (!filedir.exists()) { filedir.mkdir(); } @@ -336,9 +340,8 @@ public class BackupUtils { } catch (IOException e) { e.printStackTrace(); } - +// try catch 异常处理 return null; } } - - + diff --git a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java index 2a14982..3e84b20 100644 --- a/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java +++ b/src/MiNotes-master/app/src/main/java/net/micode/notes/tool/DataUtils.java @@ -35,9 +35,11 @@ import java.util.ArrayList; import java.util.HashSet; +package net.micode.notes.tool; + public class DataUtils { public static final String TAG = "DataUtils"; - public static boolean batchDeleteNotes(ContentResolver resolver, HashSet ids) { + public static boolean batchDeleteNotes(ContentResolver resolver, HashSet ids) { //直接删除多个笔记 if (ids == null) { Log.d(TAG, "the ids is null"); return true; @@ -46,19 +48,20 @@ public class DataUtils { Log.d(TAG, "no id is in the hashset"); return true; } - - ArrayList operationList = new ArrayList(); + + ArrayList operationList = new ArrayList(); //提供一个任务列表 for (long id : ids) { if(id == Notes.ID_ROOT_FOLDER) { Log.e(TAG, "Don't delete system folder root"); continue; - } + } //如果发现是根文件夹，则不删除 ContentProviderOperation.Builder builder = ContentProviderOperation - .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id)); - operationList.add(builder.build()); + .newDelete(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id)); //用newDelete实现删除功能 + operationList.add(builder.build()); // } try { - ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList); + ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList);//主机名（或叫Authority）用于唯一标识这个ContentProvider，外部调用者可以根据这个标识来找到它。 + //数据库事务，数据库事务是由一组数据库操作序列组成，事务作为一个整体被执行 if (results == null || results.length == 0 || results[0] == null) { Log.d(TAG, "delete notes failed, ids:" + ids.toString()); return false; @@ -71,33 +74,33 @@ public class DataUtils { } return false; } - + public static void moveNoteToFoler(ContentResolver resolver, long id, long srcFolderId, long desFolderId) { ContentValues values = new ContentValues(); values.put(NoteColumns.PARENT_ID, desFolderId); values.put(NoteColumns.ORIGIN_PARENT_ID, srcFolderId); values.put(NoteColumns.LOCAL_MODIFIED, 1); - resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null); + resolver.update(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id), values, null, null); //对需要移动的便签进行数据更新，然后用update实现 } - + public static boolean batchMoveToFolder(ContentResolver resolver, HashSet ids, long folderId) { if (ids == null) { Log.d(TAG, "the ids is null"); return true; } - + ArrayList operationList = new ArrayList(); for (long id : ids) { ContentProviderOperation.Builder builder = ContentProviderOperation - .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id)); + .newUpdate(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, id)); //通过withAppendedId方法，为该Uri加上ID builder.withValue(NoteColumns.PARENT_ID, folderId); builder.withValue(NoteColumns.LOCAL_MODIFIED, 1); operationList.add(builder.build()); - } - + }//将ids里包含的每一列的数据逐次加入到operationList中，等待最后的批量处理 + try { - ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList); + ContentProviderResult[] results = resolver.applyBatch(Notes.AUTHORITY, operationList); //applyBatch一次性处理一个操作列表 if (results == null || results.length == 0 || results[0] == null) { Log.d(TAG, "delete notes failed, ids:" + ids.toString()); return false; @@ -110,7 +113,7 @@ public class DataUtils { } return false; } - + /** * Get the all folder count except system folders {@link Notes#TYPE_SYSTEM}} */ @@ -119,13 +122,13 @@ public class DataUtils { new String[] { "COUNT(*)" }, NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>?", new String[] { String.valueOf(Notes.TYPE_FOLDER), String.valueOf(Notes.ID_TRASH_FOLER)}, - null); - + null); //筛选条件：源文件不为trash folder + int count = 0; if(cursor != null) { if(cursor.moveToFirst()) { try { - count = cursor.getInt(0); + count = cursor.getInt(0); } catch (IndexOutOfBoundsException e) { Log.e(TAG, "get folder count failed:" + e.toString()); } finally { @@ -134,29 +137,29 @@ public class DataUtils { } } return count; - } - + } + public static boolean visibleInNoteDatabase(ContentResolver resolver, long noteId, int type) { - Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), + Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), //通过withAppendedId方法，为该Uri加上ID null, NoteColumns.TYPE + "=? AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER, - new String [] {String.valueOf(type)}, - null); - + new String [] {String.valueOf(type)}, + null); //查询条件：type符合，且不属于垃圾文件夹 + boolean exist = false; if (cursor != null) { - if (cursor.getCount() > 0) { + if (cursor.getCount() > 0) {//用getcount函数判断cursor是否为空 exist = true; } cursor.close(); } return exist; } - + public static boolean existInNoteDatabase(ContentResolver resolver, long noteId) { Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null, null, null, null); - + boolean exist = false; if (cursor != null) { if (cursor.getCount() > 0) { @@ -166,11 +169,11 @@ public class DataUtils { } return exist; } - + public static boolean existInDataDatabase(ContentResolver resolver, long dataId) { Cursor cursor = resolver.query(ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null, null, null, null); - + boolean exist = false; if (cursor != null) { if (cursor.getCount() > 0) { @@ -180,13 +183,14 @@ public class DataUtils { } return exist; } - + public static boolean checkVisibleFolderName(ContentResolver resolver, String name) { Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, null, NoteColumns.TYPE + "=" + Notes.TYPE_FOLDER + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + " AND " + NoteColumns.SNIPPET + "=?", new String[] { name }, null); + //通过名字查询文件是否存在 boolean exist = false; if(cursor != null) { if(cursor.getCount() > 0) { @@ -196,14 +200,14 @@ public class DataUtils { } return exist; } - + public static HashSet getFolderNoteWidget(ContentResolver resolver, long folderId) { Cursor c = resolver.query(Notes.CONTENT_NOTE_URI, new String[] { NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE }, NoteColumns.PARENT_ID + "=?", new String[] { String.valueOf(folderId) }, - null); - + null); //查询条件：父ID是传入的folderId; + HashSet set = null; if (c != null) { if (c.moveToFirst()) { @@ -211,26 +215,26 @@ public class DataUtils { do { try { AppWidgetAttribute widget = new AppWidgetAttribute(); - widget.widgetId = c.getInt(0); - widget.widgetType = c.getInt(1); + widget.widgetId = c.getInt(0); //0对应的NoteColumns.WIDGET_ID + widget.widgetType = c.getInt(1); //1对应的NoteColumns.WIDGET_TYPE set.add(widget); } catch (IndexOutOfBoundsException e) { Log.e(TAG, e.toString()); } - } while (c.moveToNext()); + } while (c.moveToNext()); //查询下一条 } c.close(); } return set; } - + public static String getCallNumberByNoteId(ContentResolver resolver, long noteId) { Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI, new String [] { CallNote.PHONE_NUMBER }, CallNote.NOTE_ID + "=? AND " + CallNote.MIME_TYPE + "=?", new String [] { String.valueOf(noteId), CallNote.CONTENT_ITEM_TYPE }, null); - + if (cursor != null && cursor.moveToFirst()) { try { return cursor.getString(0); @@ -242,7 +246,7 @@ public class DataUtils { } return ""; } - + public static long getNoteIdByPhoneNumberAndCallDate(ContentResolver resolver, String phoneNumber, long callDate) { Cursor cursor = resolver.query(Notes.CONTENT_DATA_URI, new String [] { CallNote.NOTE_ID }, @@ -250,11 +254,12 @@ public class DataUtils { + CallNote.PHONE_NUMBER + ",?)", new String [] { String.valueOf(callDate), CallNote.CONTENT_ITEM_TYPE, phoneNumber }, null); - + //通过数据库操作，查询条件是（callDate和phoneNumber匹配传入参数的值） + if (cursor != null) { if (cursor.moveToFirst()) { try { - return cursor.getLong(0); + return cursor.getLong(0); //0对应的CallNote.NOTE_ID } catch (IndexOutOfBoundsException e) { Log.e(TAG, "Get call note id fails " + e.toString()); } @@ -263,14 +268,14 @@ public class DataUtils { } return 0; } - + public static String getSnippetById(ContentResolver resolver, long noteId) { Cursor cursor = resolver.query(Notes.CONTENT_NOTE_URI, new String [] { NoteColumns.SNIPPET }, NoteColumns.ID + "=?", new String [] { String.valueOf(noteId)}, - null); - + null);//查询条件：noteId + if (cursor != null) { String snippet = ""; if (cursor.moveToFirst()) { @@ -281,8 +286,7 @@ public class DataUtils { } throw new IllegalArgumentException("Note is not found with id: " + noteId); } - - public static String getFormattedSnippet(String snippet) { + public static String getFormattedSnippet(String snippet) { //对字符串进行格式处理，将字符串两头的空格去掉，同时将换行符去掉 if (snippet != null) { snippet = snippet.trim(); int index = snippet.indexOf('\n'); @@ -292,4 +296,5 @@ public class DataUtils { } return snippet; } -} + +} \ No newline at end of file