diff --git a/MiNote/app/src/main/java/net/micode/notes/data/Contact.java b/MiNote/app/src/main/java/net/micode/notes/data/Contact.java index d97ac5d..6fcd914 100644 --- a/MiNote/app/src/main/java/net/micode/notes/data/Contact.java +++ b/MiNote/app/src/main/java/net/micode/notes/data/Contact.java @@ -25,10 +25,12 @@ import android.util.Log; import java.util.HashMap; +// 联系人 public class Contact { 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 " @@ -36,17 +38,20 @@ public class Contact { + " 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 }, @@ -54,17 +59,21 @@ public class Contact { new String[] { phoneNumber }, null); + // 判定查询结果 + // moveToFirst() 返回第一条 if (cursor != null && cursor.moveToFirst()) { try { 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; diff --git a/MiNote/app/src/main/java/net/micode/notes/data/Notes.java b/MiNote/app/src/main/java/net/micode/notes/data/Notes.java index f240604..00a0878 100644 --- a/MiNote/app/src/main/java/net/micode/notes/data/Notes.java +++ b/MiNote/app/src/main/java/net/micode/notes/data/Notes.java @@ -20,6 +20,8 @@ import android.net.Uri; public class Notes { public static final String AUTHORITY = "micode_notes"; public static final String TAG = "Notes"; + + // 以下三个常量在设置NoteColumns.TYPE的时会用到 public static final int TYPE_NOTE = 0; public static final int TYPE_FOLDER = 1; public static final int TYPE_SYSTEM = 2; @@ -54,13 +56,17 @@ public class Notes { /** * Uri to query all notes and folders */ - 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 CONTENT_NOTE_URI = Uri.parse("content://" + AUTHORITY + "/note");// /** * Uri to query data */ + // 定义查找数据的指针 public static final Uri CONTENT_DATA_URI = Uri.parse("content://" + AUTHORITY + "/data"); + // 定义NoteColumns的常量，用于后面创建数据库的表头 + // 这些常量主要用于定义便签的属性 public interface NoteColumns { /** * The unique ID for a row @@ -167,6 +173,8 @@ public class Notes { public static final String VERSION = "version"; } + // 定义DataColumns的常量，用于后面创建数据库的表头 + // 主要用于定义储存便签内容数据 public interface DataColumns { /** * The unique ID for a row @@ -241,6 +249,7 @@ public class Notes { public static final String DATA5 = "data5"; } + // 文本内容的数据结构 public static final class TextNote implements DataColumns { /** * Mode to indicate the text in check list mode or not @@ -257,6 +266,7 @@ public class Notes { public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/text_note"); } + // 电话内容的数据结构 public static final class CallNote implements DataColumns { /** * Call date for this record diff --git a/MiNote/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java b/MiNote/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java index ffe5d57..1f4e4f2 100644 --- a/MiNote/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java +++ b/MiNote/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java @@ -16,22 +16,23 @@ 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;// 用于保存数据信息，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 +import android.database.sqlite.SQLiteDatabase;// 主要提供了用于添加、删除、更新、查询的操作方法：insert(), delete(), update()和query()。配合content.values使用 +import android.database.sqlite.SQLiteOpenHelper;// 用于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，用于SQLOpenHelper，对一些note和文件进行数据库的操作，比如删除文件时删除对应的note public class NotesDatabaseHelper extends SQLiteOpenHelper { private static final String DB_NAME = "note.db"; private static final int DB_VERSION = 4; + // 接口，分为note和data public interface TABLE { public static final String NOTE = "note"; @@ -42,6 +43,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { private static NotesDatabaseHelper mInstance; + // 数据库中需要存储的项目的名称，创建表头内容 private static final String CREATE_NOTE_TABLE_SQL = "CREATE TABLE " + TABLE.NOTE + "(" + NoteColumns.ID + " INTEGER PRIMARY KEY," + @@ -63,6 +65,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + ")"; + // 同上，存储项目不同 private static final String CREATE_DATA_TABLE_SQL = "CREATE TABLE " + TABLE.DATA + "(" + DataColumns.ID + " INTEGER PRIMARY KEY," + @@ -78,6 +81,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + ")"; + // 存储便签编号的数据表格 private static final String CREATE_DATA_NOTE_ID_INDEX_SQL = "CREATE INDEX IF NOT EXISTS note_id_index ON " + TABLE.DATA + "(" + DataColumns.NOTE_ID + ");"; @@ -85,6 +89,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Increase folder's note count when move note to the folder */ + // 在文件夹中移入一个Note之后需要更改的数据表格 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 + @@ -97,6 +102,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Decrease folder's note count when move note from folder */ + // 在文件夹中移出一个Note之后需要更改的数据表格 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 + @@ -110,6 +116,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Increase folder's note count when insert new note to the folder */ + // 在文件夹中插入一个Note之后需要更改的数据表格 private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER = "CREATE TRIGGER increase_folder_count_on_insert " + " AFTER INSERT ON " + TABLE.NOTE + @@ -122,6 +129,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Decrease folder's note count when delete note from the folder */ + // 在文件夹中删除一个Note之后需要更改的数据表格 private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER = "CREATE TRIGGER decrease_folder_count_on_delete " + " AFTER DELETE ON " + TABLE.NOTE + @@ -135,6 +143,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Update note's content when insert data with type {@link DataConstants#NOTE} */ + // 在文件夹中对于一个Note导入新的数据之后需要更改的数据表格 private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = "CREATE TRIGGER update_note_content_on_insert " + " AFTER INSERT ON " + TABLE.DATA + @@ -148,6 +157,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Update note's content when data with {@link DataConstants#NOTE} type has changed */ + // Note数据被更改后需要修改的数据表格 private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = "CREATE TRIGGER update_note_content_on_update " + " AFTER UPDATE ON " + TABLE.DATA + @@ -161,6 +171,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Update note's content when data with {@link DataConstants#NOTE} type has deleted */ + // Note数据被删除后需要修改的数据表格 private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER = "CREATE TRIGGER update_note_content_on_delete " + " AFTER delete ON " + TABLE.DATA + @@ -174,6 +185,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Delete datas belong to note which has been deleted */ + // 删除已删除的Note数据后需要修改的数据表格 private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER = "CREATE TRIGGER delete_data_on_delete " + " AFTER DELETE ON " + TABLE.NOTE + @@ -185,6 +197,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Delete notes belong to folder which has been deleted */ + // 删除已删除的文件夹的Note后需要修改的数据表格 private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER = "CREATE TRIGGER folder_delete_notes_on_delete " + " AFTER DELETE ON " + TABLE.NOTE + @@ -196,6 +209,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { /** * Move notes belong to folder which has been moved to trash folder */ + // 还原垃圾桶中Note后需要更改的数据表格 private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = "CREATE TRIGGER folder_move_notes_on_trash " + " AFTER UPDATE ON " + TABLE.NOTE + @@ -206,10 +220,12 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " WHERE " + NoteColumns.PARENT_ID + "=old." + NoteColumns.ID + ";" + " END"; + // 构造函数，传入数据库的名称和版本 public NotesDatabaseHelper(Context context) { super(context, DB_NAME, null, DB_VERSION); } + // 创建表格（用于存储标签属性） public void createNoteTable(SQLiteDatabase db) { db.execSQL(CREATE_NOTE_TABLE_SQL); reCreateNoteTableTriggers(db); @@ -217,6 +233,10 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { Log.d(TAG, "note table has been created"); } + /* + execSQL是数据库操作的API，主要是更改行为的SQL语句 + 在这里主要是用于重新创建上述定义表格，先删除原有的数据库的触发器再重新创建新的数据库 + */ 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"); @@ -235,6 +255,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.execSQL(FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER); } + // 创建系统文件夹 private void createSystemFolder(SQLiteDatabase db) { ContentValues values = new ContentValues(); @@ -270,6 +291,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.insert(TABLE.NOTE, null, values); } + // 创建表格（用于存储标签内容） public void createDataTable(SQLiteDatabase db) { db.execSQL(CREATE_DATA_TABLE_SQL); reCreateDataTableTriggers(db); diff --git a/MiNote/app/src/main/res/drawable-hdpi/flower.jpg b/MiNote/app/src/main/res/drawable-hdpi/flower.jpg new file mode 100644 index 0000000..7d9e3da Binary files /dev/null and b/MiNote/app/src/main/res/drawable-hdpi/flower.jpg differ diff --git a/MiNote/app/src/main/res/drawable-hdpi/mountain.jpg b/MiNote/app/src/main/res/drawable-hdpi/mountain.jpg new file mode 100644 index 0000000..875a470 Binary files /dev/null and b/MiNote/app/src/main/res/drawable-hdpi/mountain.jpg differ diff --git a/MiNote/app/src/main/res/drawable-hdpi/saying.jpg b/MiNote/app/src/main/res/drawable-hdpi/saying.jpg new file mode 100644 index 0000000..1ec26af Binary files /dev/null and b/MiNote/app/src/main/res/drawable-hdpi/saying.jpg differ diff --git a/MiNote/app/src/main/res/drawable-hdpi/water.jpg b/MiNote/app/src/main/res/drawable-hdpi/water.jpg new file mode 100644 index 0000000..75176ee Binary files /dev/null and b/MiNote/app/src/main/res/drawable-hdpi/water.jpg differ