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Note.java注释

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ruiguifeng 8 months ago
parent e539821cd0
commit dd36a8082c
1 changed files with 42 additions and 51 deletions
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93
src/model/Note.java
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@ -5,7 +5,7 @@
* 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
* 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,
@ -33,27 +33,36 @@ import net.micode.notes.data.Notes.TextNote;
import java.util.ArrayList;
// Note类表示一个便签，包含便签的数据和与数据库交互的方法
public class Note {
// 存储便签变化的ContentValues对象
private ContentValues mNoteDiffValues;
// 存储便签数据的NoteData对象
private NoteData mNoteData;
// 日志标签
private static final String TAG = "Note";
/**
* Create a new note id for adding a new note to databases
* 创建一个新的便签ID，用于将新便签添加到数据库中
* @param context 上下文对象
* @param folderId 便签所属文件夹的ID
* @return 新创建的便签ID
*/
public static synchronized long getNewNoteId(Context context, long folderId) {
// Create a new note in the database
// 创建一个新的ContentValues对象，用于存储便签数据
ContentValues values = new ContentValues();
long createdTime = System.currentTimeMillis();
values.put(NoteColumns.CREATED_DATE, createdTime);
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.CREATED_DATE, createdTime); // 创建时间
values.put(NoteColumns.MODIFIED_DATE, createdTime); // 修改时间
values.put(NoteColumns.TYPE, Notes.TYPE_NOTE); // 便签类型
values.put(NoteColumns.LOCAL_MODIFIED, 1); // 本地修改标志
values.put(NoteColumns.PARENT_ID, folderId); // 父ID，即文件夹ID
// 将新便签插入数据库
Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);
long noteId = 0;
try {
// 从URI中获取新创建的便签ID
noteId = Long.valueOf(uri.getPathSegments().get(1));
} catch (NumberFormatException e) {
Log.e(TAG, "Get note id error :" + e.toString());
@ -65,41 +74,50 @@ public class Note {
return noteId;
}
// Note类的构造函数
public Note() {
mNoteDiffValues = new ContentValues();
mNoteData = new NoteData();
}
// 设置便签的值
public void setNoteValue(String key, String value) {
mNoteDiffValues.put(key, value);
mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); // 设置本地修改标志
mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); // 设置修改时间
}
// 设置文本数据
public void setTextData(String key, String value) {
mNoteData.setTextData(key, value);
}
// 设置文本数据ID
public void setTextDataId(long id) {
mNoteData.setTextDataId(id);
}
// 获取文本数据ID
public long getTextDataId() {
return mNoteData.mTextDataId;
}
// 设置通话数据ID
public void setCallDataId(long id) {
mNoteData.setCallDataId(id);
}
// 设置通话数据
public void setCallData(String key, String value) {
mNoteData.setCallData(key, value);
}
// 检查便签是否本地修改过
public boolean isLocalModified() {
return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified();
}
// 同步便签到数据库
public boolean syncNote(Context context, long noteId) {
if (noteId <= 0) {
throw new IllegalArgumentException("Wrong note id:" + noteId);
@ -110,15 +128,15 @@ public class Note {
}
/**
* In theory, once data changed, the note should be updated on {@link NoteColumns#LOCAL_MODIFIED} and
* {@link NoteColumns#MODIFIED_DATE}. For data safety, though update note fails, we also update the
* note data info
* 理论上，一旦数据变化，便签应该在{@link NoteColumns#LOCAL_MODIFIED}和
* {@link NoteColumns#MODIFIED_DATE}上更新。为了数据安全，即使更新便签失败，我们也应该更新
* 便签数据信息
*/
if (context.getContentResolver().update(
ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), mNoteDiffValues, null,
null) == 0) {
Log.e(TAG, "Update note error, should not happen");
// Do not return, fall through
// 不返回，继续执行
}
mNoteDiffValues.clear();
@ -130,15 +148,12 @@ public class Note {
return true;
}
// NoteData内部类，存储便签的数据
private class NoteData {
private long mTextDataId;
private ContentValues mTextDataValues;
private long mCallDataId;
private ContentValues mCallDataValues;
private static final String TAG = "NoteData";
public NoteData() {
@ -148,10 +163,12 @@ public class Note {
mCallDataId = 0;
}
// 检查便签数据是否本地修改过
boolean isLocalModified() {
return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;
}
// 设置文本数据ID
void setTextDataId(long id) {
if(id <= 0) {
throw new IllegalArgumentException("Text data id should larger than 0");
@ -159,6 +176,7 @@ public class Note {
mTextDataId = id;
}
// 设置通话数据ID
void setCallDataId(long id) {
if (id <= 0) {
throw new IllegalArgumentException("Call data id should larger than 0");
@ -166,21 +184,24 @@ public class Note {
mCallDataId = id;
}
// 设置通话数据
void setCallData(String key, String value) {
mCallDataValues.put(key, value);
mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
}
// 设置文本数据
void setTextData(String key, String value) {
mTextDataValues.put(key, value);
mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
}
// 将便签数据推送到内容解析器
Uri pushIntoContentResolver(Context context, long noteId) {
/**
* Check for safety
* 安全检查
*/
if (noteId <= 0) {
throw new IllegalArgumentException("Wrong note id:" + noteId);
@ -220,34 +241,4 @@ public class Note {
try {
setCallDataId(Long.valueOf(uri.getPathSegments().get(1)));
} catch (NumberFormatException e) {
Log.e(TAG, "Insert new call data fail with noteId" + noteId);
mCallDataValues.clear();
return null;
}
} else {
builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
Notes.CONTENT_DATA_URI, mCallDataId));
builder.withValues(mCallDataValues);
operationList.add(builder.build());
}
mCallDataValues.clear();
}
if (operationList.size() > 0) {
try {
ContentProviderResult[] results = context.getContentResolver().applyBatch(
Notes.AUTHORITY, operationList);
return (results == null || results.length == 0 || results[0] == null) ? null
: ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId);
} catch (RemoteException e) {
Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
return null;
} catch (OperationApplicationException e) {
Log.e(TAG, String.format("%s: %s", e.toString(), e.getMessage()));
return null;
}
}
return null;
}
}
}
Log.e(TAG, "Insert new call data fail with noteId" + noteId);
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