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@ -15,6 +15,7 @@
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*/
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package net.micode.notes.model;
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// 导入必要的Android类库
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import android.content.ContentProviderOperation;
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import android.content.ContentProviderResult;
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import android.content.ContentUris;
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@ -25,6 +26,7 @@ import android.net.Uri;
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import android.os.RemoteException;
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import android.util.Log;
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// 导入项目中定义的数据访问类库
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import net.micode.notes.data.Notes;
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import net.micode.notes.data.Notes.CallNote;
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import net.micode.notes.data.Notes.DataColumns;
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@ -33,16 +35,20 @@ import net.micode.notes.data.Notes.TextNote;
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import java.util.ArrayList;
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// 定义Note类,用于处理笔记数据的创建、更新和同步
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public class Note {
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// 用于存储笔记数据变化的ContentValues对象
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private ContentValues mNoteDiffValues;
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// 内部类NoteData的实例,用于存储笔记的文本和呼叫数据
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private NoteData mNoteData;
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// 用于日志记录的标签
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private static final String TAG = "Note";
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/**
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* Create a new note id for adding a new note to databases
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* 创建一个新的笔记ID,用于将新笔记添加到数据库
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*/
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public static synchronized long getNewNoteId(Context context, long folderId) {
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// Create a new note in the database
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// 创建一个新的笔记条目在数据库中
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ContentValues values = new ContentValues();
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long createdTime = System.currentTimeMillis();
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values.put(NoteColumns.CREATED_DATE, createdTime);
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@ -50,10 +56,12 @@ public class Note {
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values.put(NoteColumns.TYPE, Notes.TYPE_NOTE);
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values.put(NoteColumns.LOCAL_MODIFIED, 1);
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values.put(NoteColumns.PARENT_ID, folderId);
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// 将新笔记插入数据库,并获取返回的URI
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Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);
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long noteId = 0;
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try {
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// 从URI中解析出新创建的笔记ID
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noteId = Long.valueOf(uri.getPathSegments().get(1));
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} catch (NumberFormatException e) {
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Log.e(TAG, "Get note id error :" + e.toString());
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@ -65,41 +73,50 @@ public class Note {
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return noteId;
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}
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// Note类的构造函数
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public Note() {
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mNoteDiffValues = new ContentValues();
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mNoteData = new NoteData();
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}
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// 设置笔记的值
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public void setNoteValue(String key, String value) {
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mNoteDiffValues.put(key, value);
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
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}
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// 设置笔记的文本数据
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public void setTextData(String key, String value) {
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mNoteData.setTextData(key, value);
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}
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// 设置笔记的文本数据ID
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public void setTextDataId(long id) {
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mNoteData.setTextDataId(id);
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}
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// 获取笔记的文本数据ID
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public long getTextDataId() {
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return mNoteData.mTextDataId;
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}
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// 设置笔记的呼叫数据ID
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public void setCallDataId(long id) {
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mNoteData.setCallDataId(id);
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}
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// 设置笔记的呼叫数据
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public void setCallData(String key, String value) {
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mNoteData.setCallData(key, value);
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}
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// 检查笔记是否在本地被修改过
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public boolean isLocalModified() {
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return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();
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}
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// 同步笔记到数据库
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public boolean syncNote(Context context, long noteId) {
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if (noteId <= 0) {
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throw new IllegalArgumentException("Wrong note id:" + noteId);
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@ -110,15 +127,14 @@ public class Note {
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}
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/**
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* In theory, once data changed, the note should be updated on {@link NoteColumns#LOCAL_MODIFIED} and
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* {@link NoteColumns#MODIFIED_DATE}. For data safety, though update note fails, we also update the
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* note data info
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* 理论上,一旦数据发生变化,就应该更新笔记的LOCAL_MODIFIED和MODIFIED_DATE字段。
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* 为了数据安全,即使更新失败,也应该更新笔记数据信息。
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*/
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if (context.getContentResolver().update(
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ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), mNoteDiffValues, null,
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null) == 0) {
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Log.e(TAG, "Update note error, should not happen");
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// Do not return, fall through
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// 即使更新失败,也不返回,继续执行
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}
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mNoteDiffValues.clear();
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@ -130,15 +146,12 @@ public class Note {
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return true;
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}
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// 内部类NoteData,用于存储笔记的文本和呼叫数据
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private class NoteData {
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private long mTextDataId;
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private ContentValues mTextDataValues;
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private long mCallDataId;
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private ContentValues mCallDataValues;
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private static final String TAG = "NoteData";
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public NoteData() {
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@ -148,10 +161,12 @@ public class Note {
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mCallDataId = 0;
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}
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// 检查笔记数据是否在本地被修改过
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boolean isLocalModified() {
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return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;
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}
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// 设置笔记的文本数据ID
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void setTextDataId(long id) {
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if(id <= 0) {
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throw new IllegalArgumentException("Text data id should larger than 0");
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@ -159,6 +174,7 @@ public class Note {
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mTextDataId = id;
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}
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// 设置笔记的呼叫数据ID
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void setCallDataId(long id) {
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if (id <= 0) {
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throw new IllegalArgumentException("Call data id should larger than 0");
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@ -166,21 +182,24 @@ public class Note {
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mCallDataId = id;
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}
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// 设置笔记的呼叫数据
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void setCallData(String key, String value) {
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mCallDataValues.put(key, value);
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
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}
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// 设置笔记的文本数据
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void setTextData(String key, String value) {
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mTextDataValues.put(key, value);
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
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}
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// 将笔记数据推送到内容解析器
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Uri pushIntoContentResolver(Context context, long noteId) {
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/**
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* Check for safety
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* 检查参数安全
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*/
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if (noteId <= 0) {
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throw new IllegalArgumentException("Wrong note id:" + noteId);
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