/* * 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. */ package net.micode.notes.model; import android.appwidget.AppWidgetManager; import android.content.ContentUris; import android.content.Context; import android.database.Cursor; import android.text.TextUtils; import android.util.Log; import net.micode.notes.data.Notes; import net.micode.notes.data.Notes.CallNote; import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.DataConstants; import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.data.Notes.TextNote; import net.micode.notes.tool.ResourceParser.NoteBgResources; /** * * @ProjectName: xiaomibianqian * @Package: model * @ClassName: WorkingNote * @Description: 创建了一个正在工作的便签类,其中有大量的参数,包括参量类、布尔值类、区分类的变量 * 另外,封装了一系列的函数,其中有返回私有变量的,与数据库进行操作的,在不同情况下操作的(如新建的便签与修改的便签) * 主要交互的包、类:NoteEditActivities,Notes(from data)Note NoteListActivity SqlData * 另外,有创建一些接口,比如NoteSettingChangedListener,在NoteEditActivities中具体实现 * * @Author: zhoushiyu_br * @CreateDate: 2023.12.16 * @UpdateUser: 更新者: * @UpdateDate: 2023.12.21 * @UpdateRemark: 更新说明: * @Version: 这次更新主要是修改了之前代码批注不够规范的问题,结合上课毛教员对于问题的指出,对格式进行了优化——PickupRAIN */ public class WorkingNote { // Note for the working note private String mPassword; private Note mNote;//这个在Note里面定义了Note类的基本类型, // Note Id private long mNoteId; // Note content private String mContent; // Note mode private int mMode; private long mAlertDate; private long mModifiedDate;//最后的修改日期 private int mBgColorId;//定义的颜色的ID private int mWidgetId;//定义了一个int类型,用来定位到哪一个小组件被使用 private int mWidgetType;//定义了一个int类型,用来区分使用了什么类型的小组件 private long mFolderId;//用来定位便签放在哪个文件夹 private Context mContext; public boolean PRIVATE_MODE = false; private static final String TAG = "WorkingNote"; //定义为静态变量,保证不能再被更改。防止数据出现异常 private boolean mIsDeleted; //定义一个布尔变量,用来保存是否要被删除。通过查看用法,发现在后面保存|修改的时候要进行判断。 private NoteSettingChangedListener mNoteSettingStatusListener;//定义了一个接口,具体是在NoteEditActivities中实现,实现对于便签是否修改的监听 /** * 定义一个数组,保存DataColumn数组当中的一些列变量。关于DataColumn的注解我写在了定义处。 * 之所以用一个字符串数组来调用DataColumn接口,是为了“方便在进行数据库操作时可以一次性指定需要查询的列”? * 这个数组只有在loadNoteData这个函数的时候进行了调用。将数据加载到 * 12.22更新,我学习了getContentResolver()的用法 * 实际上,getContentResolver是用来查询数据库的,这里定义的Projection是所有属性的集合。数据库查询,按列进行 * 在按列查询时,在数据库访问到底,只需要在数组中继续访问即可。关于函数详解我会写在函数的定义处; */ public static final String[] DATA_PROJECTION = new String[] { DataColumns.ID,//在Note里面定义一个接口类型 DataColumns.CONTENT, DataColumns.MIME_TYPE, DataColumns.DATA1, DataColumns.DATA2, DataColumns.DATA3, DataColumns.DATA4, }; //这里的用法基本同上方,不过这些接口最后使用在数据库中 public static final String[] NOTE_PROJECTION = new String[] { NoteColumns.PARENT_ID, NoteColumns.ALERTED_DATE, NoteColumns.BG_COLOR_ID, NoteColumns.WIDGET_ID, NoteColumns.WIDGET_TYPE, NoteColumns.MODIFIED_DATE }; /** * 定义了一系列的基础值。 */ private static final int DATA_ID_COLUMN = 0; private static final int DATA_CONTENT_COLUMN = 1; private static final int DATA_MIME_TYPE_COLUMN = 2; private static final int DATA_MODE_COLUMN = 3; private static final int NOTE_PARENT_ID_COLUMN = 0; private static final int NOTE_ALERTED_DATE_COLUMN = 1; private static final int NOTE_BG_COLOR_ID_COLUMN = 2; private static final int NOTE_WIDGET_ID_COLUMN = 3; private static final int NOTE_WIDGET_TYPE_COLUMN = 4; private static final int NOTE_MODIFIED_DATE_COLUMN = 5; // New note construct //初始化一个新的操作的Note private WorkingNote(Context context, long folderId) { mContext = context; mAlertDate = 0;//这里为什么是0还存疑 mModifiedDate = System.currentTimeMillis();//获取系统时间,保存给最后修改时间 mFolderId = folderId; mNote = new Note(); mNoteId = 0; mIsDeleted = false; mMode = 0; mWidgetType = Notes.TYPE_WIDGET_INVALIDE; } //由于传入了noteId,所以是对一个已经存在的便签进行操作。 //由于一些基本的已经定义,所以传入的变量很少。 // Existing note construct private WorkingNote(Context context, long noteId, long folderId) { mContext = context; mNoteId = noteId; mFolderId = folderId; mIsDeleted = false; mNote = new Note(); loadNote(); } /** * @author: zhoushiyu_PickupRAIN * @methodsName: loadNote * @description: 创建游标,对数据库进行操作。首先从传入的URI中找到数据库地址,对元素数组进行逐列筛选。 * @param: 虽然没传入,,但是说明一下 * ->Notes.CONTENT_NOTE_URI:数据库的地址,根据URI找到相应数据库 * ->NOTE_PROJECTION :属性列表,包含了所有的表头 * ->这里就能很容易理解为什么NOTE_PROJECTION为什么只在这里调用,也没有初始化。 * @return: String * @throws: Nopes * */ private void loadNote() { //定义一个cursor游标,用来操作数据。这里传入了很多量,如URI、Id、和来自Projection的一系列。 Cursor cursor = mContext.getContentResolver().query( ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, mNoteId), NOTE_PROJECTION, null, null, null); //设置一个cursor,按行提取各种信息,保存到对应的变量中 if (cursor != null) { if (cursor.moveToFirst()) { mFolderId = cursor.getLong(NOTE_PARENT_ID_COLUMN); mBgColorId = cursor.getInt(NOTE_BG_COLOR_ID_COLUMN); mWidgetId = cursor.getInt(NOTE_WIDGET_ID_COLUMN); mWidgetType = cursor.getInt(NOTE_WIDGET_TYPE_COLUMN); mAlertDate = cursor.getLong(NOTE_ALERTED_DATE_COLUMN); mModifiedDate = cursor.getLong(NOTE_MODIFIED_DATE_COLUMN); } cursor.close(); } else { Log.e(TAG, "No note with id:" + mNoteId); throw new IllegalArgumentException("Unable to find note with id " + mNoteId); } loadNoteData(); } //基本同上一个函数。值得注意的是这里对数据进行了筛选(通过selection),还对MIME进行了判断后加载 private void loadNoteData() { Cursor cursor = mContext.getContentResolver().query(Notes.CONTENT_DATA_URI, DATA_PROJECTION, DataColumns.NOTE_ID + "=?", new String[] { String.valueOf(mNoteId) }, null); if (cursor != null) { if (cursor.moveToFirst()) { do { String type = cursor.getString(DATA_MIME_TYPE_COLUMN); if (DataConstants.NOTE.equals(type)) { mContent = cursor.getString(DATA_CONTENT_COLUMN); mMode = cursor.getInt(DATA_MODE_COLUMN); mNote.setTextDataId(cursor.getLong(DATA_ID_COLUMN)); } else if (DataConstants.CALL_NOTE.equals(type)) { mNote.setCallDataId(cursor.getLong(DATA_ID_COLUMN)); } else { Log.d(TAG, "Wrong note type with type:" + type); } } while (cursor.moveToNext()); } cursor.close(); } else { Log.e(TAG, "No data with id:" + mNoteId); throw new IllegalArgumentException("Unable to find note's data with id " + mNoteId); } } //简单的初始化函数,一会看一下用法 public static WorkingNote createEmptyNote(Context context, long folderId, int widgetId, int widgetType, int defaultBgColorId) { WorkingNote note = new WorkingNote(context, folderId); note.setBgColorId(defaultBgColorId); note.setWidgetId(widgetId); note.setWidgetType(widgetType); return note; } public static WorkingNote load(Context context, long id) { return new WorkingNote(context, id, 0); } //这里涉及了多线程的操作。 public synchronized boolean saveNote() { if (isWorthSaving()) { if (!existInDatabase()) { if ((mNoteId = Note.getNewNoteId(mContext, mFolderId)) == 0) { Log.e(TAG, "Create new note fail with id:" + mNoteId); return false; } } //由于没有这个便签,所以报错,并返回false mNote.syncNote(mContext, mNoteId);//这一行是同步信息的操作 /** * Update widget content if there exist any widget of this note */ //对小组件的各种属性进行判断,来确定是否有组件,进行保存 if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID && mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) { mNoteSettingStatusListener.onWidgetChanged(); } return true; } else { return false; } } /** * 以下定义、封装了一系列的实用函数,用于一些私有量的设置与判断 * */ public boolean existInDatabase() { return mNoteId > 0; } private boolean isWorthSaving() { if (mIsDeleted || (!existInDatabase() && TextUtils.isEmpty(mContent)) || (existInDatabase() && !mNote.isLocalModified())) { return false; } else { return true; } } //这个变量设置是用来记录状态设定是否有发生过更改。 public void setOnSettingStatusChangedListener(NoteSettingChangedListener l) { mNoteSettingStatusListener = l; } public void setAlertDate(long date, boolean set) { if (date != mAlertDate) { mAlertDate = date; mNote.setNoteValue(NoteColumns.ALERTED_DATE, String.valueOf(mAlertDate)); } if (mNoteSettingStatusListener != null) { mNoteSettingStatusListener.onClockAlertChanged(date, set); } } public void markDeleted(boolean mark) { mIsDeleted = mark; if (mWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID && mWidgetType != Notes.TYPE_WIDGET_INVALIDE && mNoteSettingStatusListener != null) { mNoteSettingStatusListener.onWidgetChanged(); } } public void setBgColorId(int id) { if (id != mBgColorId) { mBgColorId = id; if (mNoteSettingStatusListener != null) { mNoteSettingStatusListener.onBackgroundColorChanged(); } mNote.setNoteValue(NoteColumns.BG_COLOR_ID, String.valueOf(id)); } } //在EditActivities中使用,用来设定在list时的状态 public void setCheckListMode(int mode) { if (mMode != mode) { if (mNoteSettingStatusListener != null) { mNoteSettingStatusListener.onCheckListModeChanged(mMode, mode); } mMode = mode; mNote.setTextData(TextNote.MODE, String.valueOf(mMode)); } } public void setWidgetType(int type) { if (type != mWidgetType) { mWidgetType = type; mNote.setNoteValue(NoteColumns.WIDGET_TYPE, String.valueOf(mWidgetType)); } } public void setWidgetId(int id) { if (id != mWidgetId) { mWidgetId = id; mNote.setNoteValue(NoteColumns.WIDGET_ID, String.valueOf(mWidgetId)); } } public void setWorkingText(String text) { if (!TextUtils.equals(mContent, text)) { mContent = text; mNote.setTextData(DataColumns.CONTENT, mContent); } } /** * 从这里一直向上大概的都是一些设置状态的函数。 * 原因是设置的私有量,保证数据的可靠性 * 具体使用在onOptionsItemSelected NoteEditActivities类,中调用 */ //这里的callNote我没有搞懂 public void convertToCallNote(String phoneNumber, long callDate) { mNote.setCallData(CallNote.CALL_DATE, String.valueOf(callDate)); mNote.setCallData(CallNote.PHONE_NUMBER, phoneNumber); mNote.setNoteValue(NoteColumns.PARENT_ID, String.valueOf(Notes.ID_CALL_RECORD_FOLDER)); } public void setPassword(String password){ // mPassword=password; mNote.setNoteValue(NoteColumns.PASSWORD,password); } public boolean hasClockAlert() { return (mAlertDate > 0 ? true : false); } public String getContent() { return mContent; } public long getAlertDate() { return mAlertDate; } public long getModifiedDate() { return mModifiedDate; } public int getBgColorResId() { return NoteBgResources.getNoteBgResource(mBgColorId); } public int getBgColorId() { return mBgColorId; } public int getTitleBgResId() { return NoteBgResources.getNoteTitleBgResource(mBgColorId); } public int getCheckListMode() { return mMode; } public long getNoteId() { return mNoteId; } public long getFolderId() { return mFolderId; } public int getWidgetId() { return mWidgetId; } public int getWidgetType() { return mWidgetType; } public String getPassword() { return mPassword; } //声明了一个接口,具体都在EditActivies中进行实现。主要是一个监听(listener),来设置各个量的改变 public interface NoteSettingChangedListener { /** * Called when the background color of current note has just changed */ void onBackgroundColorChanged(); /** * Called when user set clock */ void onClockAlertChanged(long date, boolean set); /** * Call when user create note from widget */ void onWidgetChanged(); /** * Call when switch between check list mode and normal mode * @param oldMode is previous mode before change * @param newMode is new mode */ void onCheckListModeChanged(int oldMode, int newMode); } }