From 62840b26548ae95a315b244ee9402ca0e95f9a7e Mon Sep 17 00:00:00 2001 From: puavjn2x9 <3530152719@qq.com> Date: Thu, 7 Dec 2023 10:04:17 +0800 Subject: [PATCH] Update Note.java --- src/net/micode/notes/model/Note.java | 72 ++++++++++++++-------------- 1 file changed, 36 insertions(+), 36 deletions(-) diff --git a/src/net/micode/notes/model/Note.java b/src/net/micode/notes/model/Note.java index 6706cf6..3fa24ae 100644 --- a/src/net/micode/notes/model/Note.java +++ b/src/net/micode/notes/model/Note.java @@ -15,15 +15,15 @@ */ package net.micode.notes.model; -import android.content.ContentProviderOperation; -import android.content.ContentProviderResult; -import android.content.ContentUris; -import android.content.ContentValues; -import android.content.Context; -import android.content.OperationApplicationException; -import android.net.Uri; -import android.os.RemoteException; -import android.util.Log; +import android.content.ContentProviderOperation;//批量的更新、插入、删除数据。 +import android.content.ContentProviderResult;//操作的结果 +import android.content.ContentUris;//用于添加和获取Uri后面的ID +import android.content.ContentValues;//一种用来存储基本数据类型数据的存储机制 +import android.content.Context;//需要用该类来弄清楚调用者的实例 +import android.content.OperationApplicationException;//操作应用程序容错 +import android.net.Uri;//表示待操作的数据 +import android.os.RemoteException;//远程容错 +import android.util.Log;//输出日志,比如说出错、警告等 import net.micode.notes.data.Notes; import net.micode.notes.data.Notes.CallNote; @@ -49,16 +49,17 @@ public class Note { values.put(NoteColumns.MODIFIED_DATE, createdTime); values.put(NoteColumns.TYPE, Notes.TYPE_NOTE); values.put(NoteColumns.LOCAL_MODIFIED, 1); - values.put(NoteColumns.PARENT_ID, folderId); + values.put(NoteColumns.PARENT_ID, folderId);//将数据写入数据库表格 Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values); - + //ContentResolver()主要是实现外部应用对ContentProvider中的数据 + //进行添加、删除、修改和查询操作 long noteId = 0; try { noteId = Long.valueOf(uri.getPathSegments().get(1)); } catch (NumberFormatException e) { Log.e(TAG, "Get note id error :" + e.toString()); noteId = 0; - } + }//try-catch异常处理 if (noteId == -1) { throw new IllegalStateException("Wrong note id:" + noteId); } @@ -68,37 +69,37 @@ public class Note { public Note() { mNoteDiffValues = new ContentValues(); mNoteData = new NoteData(); - } + }//定义两个变量用来存储便签的数据,一个是存储便签属性、一个是存储便签内容 public void setNoteValue(String key, String value) { mNoteDiffValues.put(key, value); mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); - } + }//设置数据库表格的标签属性数据 public void setTextData(String key, String value) { mNoteData.setTextData(key, value); - } + }//设置数据库表格的标签文本内容的数据 public void setTextDataId(long id) { mNoteData.setTextDataId(id); - } + }//设置文本数据的ID public long getTextDataId() { return mNoteData.mTextDataId; - } + }//得到文本数据的ID public void setCallDataId(long id) { mNoteData.setCallDataId(id); - } + }//设置电话号码数据的ID public void setCallData(String key, String value) { mNoteData.setCallData(key, value); - } + }//得到电话号码数据的ID public boolean isLocalModified() { return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified(); - } + }//判断是否是本地修改 public boolean syncNote(Context context, long noteId) { if (noteId <= 0) { @@ -128,16 +129,16 @@ public class Note { } return true; - } + }//判断数据是否同步 - private class NoteData { + private class NoteData {//定义一个基本的便签内容的数据类,主要包含文本数据和电话号码数据 private long mTextDataId; - private ContentValues mTextDataValues; + private ContentValues mTextDataValues;//文本数据 private long mCallDataId; - private ContentValues mCallDataValues; + private ContentValues mCallDataValues;//电话号码数据 private static final String TAG = "NoteData"; @@ -147,26 +148,25 @@ public class Note { mTextDataId = 0; mCallDataId = 0; } - - boolean isLocalModified() { + boolean isLocalModified() {//判断当前对象是否有本地修改 return mTextDataValues.size() > 0 || mCallDataValues.size() > 0; } - void setTextDataId(long id) { + void setTextDataId(long id) {//设置文本数据的ID if(id <= 0) { throw new IllegalArgumentException("Text data id should larger than 0"); } mTextDataId = id; } - void setCallDataId(long id) { + void setCallDataId(long id) {//设置电话号码数据的ID if (id <= 0) { throw new IllegalArgumentException("Call data id should larger than 0"); } mCallDataId = id; } - void setCallData(String key, String value) { + void setCallData(String key, String value) {////得到电话号码数据的ID mCallDataValues.put(key, value); mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); @@ -177,17 +177,17 @@ public class Note { mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); } - + //下面函数的作用是将新的数据通过Uri的操作存储到数据库 Uri pushIntoContentResolver(Context context, long noteId) { /** * Check for safety */ if (noteId <= 0) { throw new IllegalArgumentException("Wrong note id:" + noteId); - } + }//判断数据是否合法 ArrayList operationList = new ArrayList(); - ContentProviderOperation.Builder builder = null; + ContentProviderOperation.Builder builder = null;//数据库的操作列表 if(mTextDataValues.size() > 0) { mTextDataValues.put(DataColumns.NOTE_ID, noteId); @@ -197,7 +197,7 @@ public class Note { mTextDataValues); try { setTextDataId(Long.valueOf(uri.getPathSegments().get(1))); - } catch (NumberFormatException e) { + } catch (NumberFormatException e) {//出错则清空 Log.e(TAG, "Insert new text data fail with noteId" + noteId); mTextDataValues.clear(); return null; @@ -209,7 +209,7 @@ public class Note { operationList.add(builder.build()); } mTextDataValues.clear(); - } + }//把文本数据存入DataColumns if(mCallDataValues.size() > 0) { mCallDataValues.put(DataColumns.NOTE_ID, noteId); @@ -231,7 +231,7 @@ public class Note { operationList.add(builder.build()); } mCallDataValues.clear(); - } + }//把电话号码数据存入DataColumns if (operationList.size() > 0) { try { @@ -246,7 +246,7 @@ public class Note { Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage())); return null; } - } + }//存储过程中的异常处理 return null; } }