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diff --git a/doc/阅读和维护开源软件的考评表——刘桓希、张括.xlsx b/doc/阅读和维护开源软件的考评表——刘桓希、张括.xlsx
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diff --git a/src/.idea/sonarlint/issuestore/5/7/577f30d26378ec8a2bd2e4a43f3c79b3f04c402c b/src/.idea/sonarlint/issuestore/5/7/577f30d26378ec8a2bd2e4a43f3c79b3f04c402c
index aba08ef..e84df14 100644
--- a/src/.idea/sonarlint/issuestore/5/7/577f30d26378ec8a2bd2e4a43f3c79b3f04c402c
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@@ -1,84 +1,84 @@
 
-d	java:S899�	"BDo something with the "boolean" value returned by "createNewFile".(���������
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-"*Change this "try" to a try-with-resources.(���������
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-"2Complete the task associated to this TODO comment.(�̐������
8�����.
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"QRename this local variable to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(�ӏ������
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"YReplace the type specification in this constructor call with the diamond operator ("<>").(���������
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"OMake mId a static final constant or non-public and provide accessors if needed.(���������
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"YReplace the type specification in this constructor call with the diamond operator ("<>").(����8�����.
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8�����.
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-java:S1104n"VMake tvModified a static final constant or non-public and provide accessors if needed.(��ԣ�����
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"OMake mId a static final constant or non-public and provide accessors if needed.(���������
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"QRename this local variable to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(��������
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"NRename this method name to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(���������
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diff --git a/src/.idea/sonarlint/issuestore/7/e/7e95080e97eb945562bad95d376a9dbe3224954d b/src/.idea/sonarlint/issuestore/7/e/7e95080e97eb945562bad95d376a9dbe3224954d
index 0007dc9..54a4739 100644
--- a/src/.idea/sonarlint/issuestore/7/e/7e95080e97eb945562bad95d376a9dbe3224954d
+++ b/src/.idea/sonarlint/issuestore/7/e/7e95080e97eb945562bad95d376a9dbe3224954d
@@ -1,24 +1,24 @@
 
 M
 java:S1854!"7Remove this useless assignment to local variable "dim".(����
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"NUse "java.nio.file.Files#delete" here for better messages on error conditions.(���������

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"7Remove this expression which always evaluates to "true"(����
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"<This block of commented-out lines of code should be removed.(����
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"NUse "java.nio.file.Files#delete" here for better messages on error conditions.(���������

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-R	java:S125�
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diff --git a/src/.idea/sonarlint/issuestore/a/4/a446c87b1013132f8adaf83656b582028e8809af b/src/.idea/sonarlint/issuestore/a/4/a446c87b1013132f8adaf83656b582028e8809af
index ca78d93..c01b275 100644
--- a/src/.idea/sonarlint/issuestore/a/4/a446c87b1013132f8adaf83656b582028e8809af
+++ b/src/.idea/sonarlint/issuestore/a/4/a446c87b1013132f8adaf83656b582028e8809af
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diff --git a/src/.idea/sonarlint/issuestore/a/7/a7641cfac724321d508c2a284223a711011a93f5 b/src/.idea/sonarlint/issuestore/a/7/a7641cfac724321d508c2a284223a711011a93f5
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--- a/src/.idea/sonarlint/issuestore/a/7/a7641cfac724321d508c2a284223a711011a93f5
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@@ -1,12 +1,12 @@
 
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"CMove constants defined in this interfaces to another class or enum.(����
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diff --git a/src/.idea/sonarlint/issuestore/a/d/ad590109436b2eb4769f3f458b66ad7751784d6d b/src/.idea/sonarlint/issuestore/a/d/ad590109436b2eb4769f3f458b66ad7751784d6d
index e8e4ee1..b223d00 100644
--- a/src/.idea/sonarlint/issuestore/a/d/ad590109436b2eb4769f3f458b66ad7751784d6d
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-O
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-java:S1874C"9Remove this use of "buildDrawingCache"; it is deprecated.(ݛ��
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-Q
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+M
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diff --git a/src/.idea/sonarlint/issuestore/a/d/ad72331a1bed265bb9c0fe838faa74dbf69fce32 b/src/.idea/sonarlint/issuestore/a/d/ad72331a1bed265bb9c0fe838faa74dbf69fce32
index ca56fed..f224bde 100644
--- a/src/.idea/sonarlint/issuestore/a/d/ad72331a1bed265bb9c0fe838faa74dbf69fce32
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8�����.
-H
-java:S3398�	"%Move this method into "ModeCallback".(LjԔ�����
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+java:S1135�"2Complete the task associated to this TODO comment.(��������
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 P
 java:S1199�"-Extract this nested code block into a method.(��������
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-U
-java:S1135�"2Complete the task associated to this TODO comment.(��������
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+p	java:S100�
"NRename this method name to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(��������
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+P
+java:S1199�"-Extract this nested code block into a method.(��������
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 u
 java:S3252�"RUse static access with "android.widget.AbsListView" for "MultiChoiceModeListener".(���������
8�����.
-U
-java:S1135�"2Complete the task associated to this TODO comment.(��������
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-^	java:S125�"<This block of commented-out lines of code should be removed.(���������
8�����.
-p	java:S100�
"NRename this method name to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(��������
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-k	java:S100�"NRename this method name to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(����8�����.
-U
-java:S1874�"7Remove this use of "GestureDetector"; it is deprecated.(����8�����.
+H
+java:S3398�	"%Move this method into "ModeCallback".(LjԔ�����
8�����.
+u
+java:S1450�"XRemove the "mMoveMenu" field and declare it as a local variable in the relevant methods.(���`8�����.
+9
+java:S3626�"Remove this redundant jump.(��݅
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 U
 java:S1135�"2Complete the task associated to this TODO comment.(��������
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-P
-java:S1199�"-Extract this nested code block into a method.(���������
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-o	java:S101�"MRename this class name to match the regular expression '^[A-Z][a-zA-Z0-9]*$'.(���������
8�����.
-P
-java:S1199�"-Extract this nested code block into a method.(ڿ�������
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-java:S1124�
"EReorder the modifiers to comply with the Java Language Specification.(�я������
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 K
 java:S1199�"-Extract this nested code block into a method.(տ��8�����.
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-java:S1874�"1Remove this use of "getHeight"; it is deprecated.(�Á�
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-java:S1199�"-Extract this nested code block into a method.(��ȓ8�����.
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 java:S1135�"2Complete the task associated to this TODO comment.(��������
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+java:S3626�
"Remove this redundant jump.(��݅
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-java:S1135�	"2Complete the task associated to this TODO comment.(��������
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-F	java:S108�")Either remove or fill this block of code.(��ʥ8�����.
+java:S1135�	"2Complete the task associated to this TODO comment.(��������
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 U
-java:S1135�"2Complete the task associated to this TODO comment.(��������
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+java:S1874�"7Remove this use of "GestureDetector"; it is deprecated.(����8�����.
 U
-java:S1135�"2Complete the task associated to this TODO comment.(��������
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-p
-java:S3776�"RRefactor this method to reduce its Cognitive Complexity from 18 to the 15 allowed.(�Թ�
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+java:S1135�"2Complete the task associated to this TODO comment.(��������
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+U
+java:S1135�"2Complete the task associated to this TODO comment.(��������
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-java:S1450�"XRemove the "mMoveMenu" field and declare it as a local variable in the relevant methods.(���`8�����.
-9
-java:S3626�"Remove this redundant jump.(��݅
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-x	java:S116�
"VRename this field "GestureMode" to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(���������
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+java:S3776�"RRefactor this method to reduce its Cognitive Complexity from 17 to the 15 allowed.(���������
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+w
+java:S2293�"YReplace the type specification in this constructor call with the diamond operator ("<>").(艥�8�����.
 P
-java:S1199�"-Extract this nested code block into a method.(��������
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-`
-java:S1126�"BReplace this if-then-else statement by a single method invocation.(����8�����.
-H
-java:S3398�"%Move this method into "ModeCallback".(�핺�����
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-x	java:S116�
"[Rename this field "gestures_overlay" to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(����
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-9
-java:S3626�
"Remove this redundant jump.(��݅
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-u
-java:S3776�"RRefactor this method to reduce its Cognitive Complexity from 20 to the 15 allowed.(�핺�����
8�����.
-\
-java:S1124�
"EReorder the modifiers to comply with the Java Language Specification.(۞ƣ
+java:S1199�"-Extract this nested code block into a method.(�̀������
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 U
-java:S1135�"2Complete the task associated to this TODO comment.(��������
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+java:S1135�"2Complete the task associated to this TODO comment.(��������
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+o	java:S101�"MRename this class name to match the regular expression '^[A-Z][a-zA-Z0-9]*$'.(���������
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+R
+java:S3398�"/Move this method into "BackgroundQueryHandler".(���������
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+P
+java:S1199�"-Extract this nested code block into a method.(���������
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+P
+java:S1199�"-Extract this nested code block into a method.(ڿ�������
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+O
+java:S1874�"1Remove this use of "getHeight"; it is deprecated.(�Á�
8�����.
+K
+java:S1199�"-Extract this nested code block into a method.(����8�����.
+s	java:S117�	"QRename this local variable to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(���������
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+o	java:S101�"MRename this class name to match the regular expression '^[A-Z][a-zA-Z0-9]*$'.(���������
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 P
 java:S1199�"-Extract this nested code block into a method.(���������
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+h
+java:S1124�
"EReorder the modifiers to comply with the Java Language Specification.(�я������
8�����.
+K
+java:S1199�"-Extract this nested code block into a method.(��ȓ8�����.
+`
+java:S1126�"BReplace this if-then-else statement by a single method invocation.(����8�����.
 n
 java:S1301�"KReplace this "switch" statement by "if" statements to increase readability.(ד�������
8�����.
-K
-java:S1199�"-Extract this nested code block into a method.(����8�����.
+H
+java:S3398�"%Move this method into "ModeCallback".(�핺�����
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 e
 java:S1126�	"BReplace this if-then-else statement by a single method invocation.(���������
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-R
-java:S3398�"/Move this method into "BackgroundQueryHandler".(���������
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-U
-java:S1135�"2Complete the task associated to this TODO comment.(��������
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+x	java:S116�
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-java:S1199�"-Extract this nested code block into a method.(Փ�58�����.
-u
-java:S3776�"RRefactor this method to reduce its Cognitive Complexity from 17 to the 15 allowed.(���������
8�����.
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+java:S1135�	"2Complete the task associated to this TODO comment.(��������
8�����.
+o
+java:S3776�	"RRefactor this method to reduce its Cognitive Complexity from 16 to the 15 allowed.(���-8�����.
+k	java:S100�"NRename this method name to match the regular expression '^[a-z][a-zA-Z0-9]*$'.(����8�����.
\ No newline at end of file
diff --git a/src/.idea/sonarlint/issuestore/d/1/d187f1271655c3d91661a39fe6de395b6a9f290a b/src/.idea/sonarlint/issuestore/d/1/d187f1271655c3d91661a39fe6de395b6a9f290a
index 06d7f85..2d5f494 100644
--- a/src/.idea/sonarlint/issuestore/d/1/d187f1271655c3d91661a39fe6de395b6a9f290a
+++ b/src/.idea/sonarlint/issuestore/d/1/d187f1271655c3d91661a39fe6de395b6a9f290a
@@ -1,9 +1,9 @@
 
-Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
-Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
 i
 java:S3776�"RRefactor this method to reduce its Cognitive Complexity from 16 to the 15 allowed.(�ǎ�
+Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
+Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
 X	java:S125c"<This block of commented-out lines of code should be removed.(���8�����.
 Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
-Y	java:S125�"<This block of commented-out lines of code should be removed.(���8�Ї��.
-Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
\ No newline at end of file
+Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
+Y	java:S125�"<This block of commented-out lines of code should be removed.(���8�Ї��.
\ No newline at end of file
diff --git a/src/.idea/sonarlint/issuestore/e/0/e094aec5c3e1b6f44539adff3114f5a1ad603ddc b/src/.idea/sonarlint/issuestore/e/0/e094aec5c3e1b6f44539adff3114f5a1ad603ddc
index 3705f5e..4588801 100644
--- a/src/.idea/sonarlint/issuestore/e/0/e094aec5c3e1b6f44539adff3114f5a1ad603ddc
+++ b/src/.idea/sonarlint/issuestore/e/0/e094aec5c3e1b6f44539adff3114f5a1ad603ddc
@@ -1,11 +1,11 @@
 
+X	java:S125~"<This block of commented-out lines of code should be removed.(���8�����.
 Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
 �

 java:S1319�"pThe return type of this method should be an interface such as "List" rather than the implementation "ArrayList".(�ﷺ�����

-Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
-X	java:S125F"<This block of commented-out lines of code should be removed.(���8�����.
+Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
 t
 java:S2293*"YReplace the type specification in this constructor call with the diamond operator ("<>").(�ʩ������

-X	java:S125~"<This block of commented-out lines of code should be removed.(���8�����.
-Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
-X	java:S125c"<This block of commented-out lines of code should be removed.(���8�����.
\ No newline at end of file
+X	java:S125F"<This block of commented-out lines of code should be removed.(���8�����.
+X	java:S125c"<This block of commented-out lines of code should be removed.(���8�����.
+Y	java:S125�
"<This block of commented-out lines of code should be removed.(���8�����.
\ No newline at end of file
diff --git a/src/app/src/main/java/net/micode/notes/tool/BackupUtils.java b/src/app/src/main/java/net/micode/notes/tool/BackupUtils.java
index c401896..05d3722 100644
--- a/src/app/src/main/java/net/micode/notes/tool/BackupUtils.java
+++ b/src/app/src/main/java/net/micode/notes/tool/BackupUtils.java
@@ -301,17 +301,13 @@ public class BackupUtils {
 
             try(FileOutputStream fos = new FileOutputStream(file);) {
                 ps = new PrintStream(fos);
-
             } catch (FileNotFoundException e) {
-                //e.printStackTrace();
                 Log.e(TAG, "getExportToTextPrintStream: " + e.toString() );
                 return null;
             } catch (NullPointerException e) {
-                //e.printStackTrace();
                 Log.e(TAG, "getExportToTextPrintStream: " + e.toString() );
                 return null;
             } catch (IOException e) {
-                //e.printStackTrace();
                 Log.e(TAG, "getExportToTextPrintStream: " + e.toString() );
                 return null;
             }