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@ -56,60 +56,62 @@ public class Note {
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values.put(NoteColumns.LOCAL_MODIFIED, 1);//把LOCAL_MODIFIED 本地修改 的值赋为1
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values.put(NoteColumns.PARENT_ID, folderId);//把文件夹id赋给PARENT_ID 父类id
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Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values);
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//getContentResolver()函数是实现外部应用对于ContentProvider中的数据进行增删查改的操作
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long noteId = 0;
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long noteId = 0;//用于标记错误信息
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try {
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noteId = Long.valueOf(uri.getPathSegments().get(1));
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}
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catch (NumberFormatException e) {
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Log.e(TAG, "Get note id error :" + e.toString());
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noteId = 0;
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}
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}//异常处理
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if (noteId == -1) {
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throw new IllegalStateException("Wrong note id:" + noteId);
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}
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} // 如果发生错误,输出错误ID
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return noteId;
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}
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public Note() {
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mNoteDiffValues = new ContentValues();
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mNoteData = new NoteData();
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mNoteDiffValues = new ContentValues(); //定义一个新变量,存储便签属性
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mNoteData = new NoteData();//定义一个新变量,存出便签内容
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}
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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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mNoteDiffValues.put(key, value); //设置便签属性传入ket和value
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); //设置新创建的便签更改次数为1
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); //设置新创建的更改日期为系统当前时间
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}
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public void setTextData(String key, String value) {
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mNoteData.setTextData(key, value);
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mNoteData.setTextData(key, value); //设置便签的内容和数据
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}
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public void setTextDataId(long id) {
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mNoteData.setTextDataId(id);
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mNoteData.setTextDataId(id); //设置便签数据的ID
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}
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public long getTextDataId() {
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return mNoteData.mTextDataId;
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return mNoteData.mTextDataId; //获取便签数据的ID
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}
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public void setCallDataId(long id) {
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mNoteData.setCallDataId(id);
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mNoteData.setCallDataId(id); //设置电话的数据的ID
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}
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public void setCallData(String key, String value) {
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mNoteData.setCallData(key, value);
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mNoteData.setCallData(key, value); //设置电话的内容和数据
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}
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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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return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified(); //
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}//判断是否为本地产生的修改
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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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}
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} //报告错误信息
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if (!isLocalModified()) {
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return true;
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@ -120,6 +122,13 @@ public class Note {
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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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*/
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/*
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理论上,一旦数据发生变化,应在{@link NoteColumns#LOCAL_MODIFIED}和
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{@link NotesColumns#MODIFIED_DATE}上更新注释。为了数据安全,
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虽然更新笔记失败,但我们也会更新笔记数据信息
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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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@ -134,16 +143,16 @@ public class Note {
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}
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return true;
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}
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}//用于判断便签是否正确同步
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private class NoteData {
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private long mTextDataId;
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private long mTextDataId; //定义便签数据的文件数据ID
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private ContentValues mTextDataValues;
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private ContentValues mTextDataValues; //定义文件数据
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private long mCallDataId;
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private long mCallDataId;//定义便签电话ID
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private ContentValues mCallDataValues;
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private ContentValues mCallDataValues;//定义便签电话数据
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private static final String TAG = "NoteData";
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@ -152,57 +161,62 @@ public class Note {
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mCallDataValues = new ContentValues();
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mTextDataId = 0;
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mCallDataId = 0;
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}
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} //构造函数,定义文件数据ID和电话数据ID为0,创建便签电话数据和文件数据类
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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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}//判断是否被本地修改,返回是否修改文本数据或者电话数据
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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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}
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mTextDataId = id;
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} //为文本数据ID的定义提供错误判断
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mTextDataId = id; //设置文本数据ID
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}
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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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}
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mCallDataId = id;
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}//为电话数据ID的定义提供错误判断
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mCallDataId = id;//设置电话数据ID
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}
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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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mCallDataValues.put(key, value); //设置电话数据的数据和内容
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); //设置电话数据的本地修改为1
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); //设置修改时间为本地时间
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}
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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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mTextDataValues.put(key, value); //设置文本数据
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mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);//设置文本数据的本地修改为1
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mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());//设置修改时间为本地时间
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}
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Uri pushIntoContentResolver(Context context, long noteId) {
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/*
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*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
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*/
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/**
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* Check for safety
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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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}
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}//显示错误代码
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ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>();
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ContentProviderOperation.Builder builder = null;
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ArrayList<ContentProviderOperation> operationList = new ArrayList<ContentProviderOperation>(); //定义一个新的可变数组
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ContentProviderOperation.Builder builder = null; //数据库的操作列表设置为空
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if (mTextDataValues.size() > 0) {
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mTextDataValues.put(DataColumns.NOTE_ID, noteId);
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if (mTextDataValues.size() > 0) { //如果文本数据的值不为0
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mTextDataValues.put(DataColumns.NOTE_ID, noteId); //存入note数据ID
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if (mTextDataId == 0) {
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mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE);
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Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
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mTextDataValues);
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try {
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setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));
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setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));
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}
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catch (NumberFormatException e) {
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Log.e(TAG, "Insert new text data fail with noteId" + noteId);
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@ -217,7 +231,7 @@ public class Note {
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operationList.add(builder.build());
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}
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mTextDataValues.clear();
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}
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}//把文本数据存入到DataColumns
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if (mCallDataValues.size() > 0) {
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mCallDataValues.put(DataColumns.NOTE_ID, noteId);
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@ -241,7 +255,7 @@ public class Note {
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operationList.add(builder.build());
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}
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mCallDataValues.clear();
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}
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}//把电话数据存入到DataColumns
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if (operationList.size() > 0) {
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try {
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@ -260,6 +274,6 @@ public class Note {
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}
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}
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return null;
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}
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}//存储过程中对于异常情况的处理
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}
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}
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