@ -0,0 +1,233 @@
|
||||
Note.java
|
||||
package net.micode.notes.model;
|
||||
|
||||
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
|
||||
|
||||
public class Note {
|
||||
// private ContentValues mNoteDiffValues;
|
||||
ContentValues mNoteDiffValues;//
|
||||
private NoteData mNoteData;
|
||||
private static final String TAG = "Note";
|
||||
|
||||
/**
|
||||
* Create a new note id for adding a new note to databases
|
||||
*/
|
||||
public static synchronized long getNewNoteId(Context context, long folderId) {
|
||||
// Create a new note in the database
|
||||
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);//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);
|
||||
}
|
||||
return noteId;
|
||||
}
|
||||
|
||||
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) {
|
||||
throw new IllegalArgumentException("Wrong note id:" + noteId);
|
||||
}
|
||||
|
||||
if (!isLocalModified()) {
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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
|
||||
*/
|
||||
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
|
||||
}
|
||||
mNoteDiffValues.clear();
|
||||
|
||||
if (mNoteData.isLocalModified()
|
||||
&& (mNoteData.pushIntoContentResolver(context, noteId) == null)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}//判断数据是否同步
|
||||
|
||||
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;//文本数据
|
||||
|
||||
private long mCallDataId;
|
||||
|
||||
private ContentValues mCallDataValues;//电话号码数据
|
||||
|
||||
private static final String TAG = "NoteData";
|
||||
|
||||
public NoteData() {
|
||||
mTextDataValues = new ContentValues();
|
||||
mCallDataValues = new ContentValues();
|
||||
mTextDataId = 0;
|
||||
mCallDataId = 0;
|
||||
}
|
||||
//下面是上述几个函数的具体实现
|
||||
boolean isLocalModified() {
|
||||
return mTextDataValues.size() > 0 || mCallDataValues.size() > 0;
|
||||
}
|
||||
|
||||
void setTextDataId(long id) {
|
||||
if(id <= 0) {
|
||||
throw new IllegalArgumentException("Text data id should larger than 0");
|
||||
}
|
||||
mTextDataId = id;
|
||||
}
|
||||
|
||||
void setCallDataId(long id) {
|
||||
if (id <= 0) {
|
||||
throw new IllegalArgumentException("Call data id should larger than 0");
|
||||
}
|
||||
mCallDataId = id;
|
||||
}
|
||||
|
||||
void setCallData(String key, String value) {
|
||||
mCallDataValues.put(key, value);
|
||||
mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
|
||||
mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
|
||||
}
|
||||
|
||||
void setTextData(String key, String value) {
|
||||
mTextDataValues.put(key, value);
|
||||
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<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
|
||||
ContentProviderOperation.Builder builder = null;//数据库的操作列表
|
||||
|
||||
if(mTextDataValues.size() > 0) {
|
||||
mTextDataValues.put(DataColumns.NOTE_ID, noteId);
|
||||
if (mTextDataId == 0) {
|
||||
mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE);
|
||||
Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
|
||||
mTextDataValues);
|
||||
try {
|
||||
setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));
|
||||
} catch (NumberFormatException e) {
|
||||
Log.e(TAG, "Insert new text data fail with noteId" + noteId);
|
||||
mTextDataValues.clear();
|
||||
return null;
|
||||
}
|
||||
} else {
|
||||
builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
|
||||
Notes.CONTENT_DATA_URI, mTextDataId));
|
||||
builder.withValues(mTextDataValues);
|
||||
operationList.add(builder.build());
|
||||
}
|
||||
mTextDataValues.clear();
|
||||
}//把文本数据存入DataColumns
|
||||
|
||||
if(mCallDataValues.size() > 0) {
|
||||
mCallDataValues.put(DataColumns.NOTE_ID, noteId);
|
||||
if (mCallDataId == 0) {
|
||||
mCallDataValues.put(DataColumns.MIME_TYPE, CallNote.CONTENT_ITEM_TYPE);
|
||||
Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
|
||||
mCallDataValues);
|
||||
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();
|
||||
}//把电话号码数据存入DataColumns
|
||||
|
||||
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;
|
||||
}
|
||||
}//存储过程中的异常处理
|
||||
return null;
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in new issue