diff --git a/src/.gradle/5.4.1/executionHistory/executionHistory.lock b/src/.gradle/5.4.1/executionHistory/executionHistory.lock
index 0a249ac..fd24591 100644
Binary files a/src/.gradle/5.4.1/executionHistory/executionHistory.lock and b/src/.gradle/5.4.1/executionHistory/executionHistory.lock differ
diff --git a/src/.gradle/5.4.1/fileHashes/fileHashes.lock b/src/.gradle/5.4.1/fileHashes/fileHashes.lock
index fa80030..6dbc64f 100644
Binary files a/src/.gradle/5.4.1/fileHashes/fileHashes.lock and b/src/.gradle/5.4.1/fileHashes/fileHashes.lock differ
diff --git a/src/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/src/.gradle/buildOutputCleanup/buildOutputCleanup.lock
index 50764ea..3c602af 100644
Binary files a/src/.gradle/buildOutputCleanup/buildOutputCleanup.lock and b/src/.gradle/buildOutputCleanup/buildOutputCleanup.lock differ
diff --git a/src/app/src/main/java/net/micode/notes/model/Note.java b/src/app/src/main/java/net/micode/notes/model/Note.java
index d79a353..0aa447d 100644
--- a/src/app/src/main/java/net/micode/notes/model/Note.java
+++ b/src/app/src/main/java/net/micode/notes/model/Note.java
@@ -200,13 +200,14 @@ public class Note {
             mCallDataId = id;
         }
 
-        //
+        //插入通话记录数据
         void setCallData(String key, String value) {
             mCallDataValues.put(key, value);
             mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
             mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis());
         }
 
+        //插入文本数据
         void setTextData(String key, String value) {
             mTextDataValues.put(key, value);
             mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1);
@@ -215,7 +216,7 @@ public class Note {
 
         Uri pushIntoContentResolver(Context context, long noteId) {
             /**
-             * Check for safety
+             * 防止无效的id
              */
             if (noteId <= 0) {
                 throw new IllegalArgumentException(WRONGNOTEID + noteId);
@@ -224,42 +225,57 @@ public class Note {
             ArrayList<ContentProviderOperation> operationList = new ArrayList<>();
             ContentProviderOperation.Builder builder = null;
 
+            //文本内容发生改变
             if(mTextDataValues.size() > 0) {
                 mTextDataValues.put(DataColumns.NOTE_ID, noteId);
+                //如果没有分配id号
                 if (mTextDataId == 0) {
                     mTextDataValues.put(DataColumns.MIME_TYPE, TextNote.CONTENT_ITEM_TYPE);
                     Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
                             mTextDataValues);
                     try {
+                        //尝试分配id
                         setTextDataId(Long.valueOf(uri.getPathSegments().get(1)));
                     } catch (NumberFormatException e) {
+                        //分配失败
                         Log.e(TAG, "Insert new text data fail with noteId" + noteId);
+                        //清除内容
                         mTextDataValues.clear();
                         return null;
                     }
                 } else {
+                    //已经有id号，执行下列操作
                     builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
                             Notes.CONTENT_DATA_URI, mTextDataId));
                     builder.withValues(mTextDataValues);
+                    //加入修改内容
                     operationList.add(builder.build());
                 }
+                //清除已修改
                 mTextDataValues.clear();
             }
 
+            //如果数据内容发生改变
             if(mCallDataValues.size() > 0) {
                 mCallDataValues.put(DataColumns.NOTE_ID, noteId);
+
                 if (mCallDataId == 0) {
+                    //如果没有id号，执行下列操作
                     mCallDataValues.put(DataColumns.MIME_TYPE, CallNote.CONTENT_ITEM_TYPE);
                     Uri uri = context.getContentResolver().insert(Notes.CONTENT_DATA_URI,
                             mCallDataValues);
+                    //尝试分配id
                     try {
                         setCallDataId(Long.valueOf(uri.getPathSegments().get(1)));
                     } catch (NumberFormatException e) {
+                        //失败，错误信息加入日志
                         Log.e(TAG, "Insert new call data fail with noteId" + noteId);
+                        //清除已修改内容
                         mCallDataValues.clear();
                         return null;
                     }
                 } else {
+                    //有id号，执行下列操作
                     builder = ContentProviderOperation.newUpdate(ContentUris.withAppendedId(
                             Notes.CONTENT_DATA_URI, mCallDataId));
                     builder.withValues(mCallDataValues);
@@ -269,9 +285,12 @@ public class Note {
             }
 
             if (!operationList.isEmpty()) {
+                //当前操作的便签不空，执行
                 try {
                     ContentProviderResult[] results = context.getContentResolver().applyBatch(
                             Notes.AUTHORITY, operationList);
+                    //如果res无效，插入失败，返回null值
+                    //否则返回uri
                     return (results == null || results.length == 0 || results[0] == null) ? null
                             : ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId);
                 } catch (RemoteException|OperationApplicationException e) {
diff --git a/src/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java b/src/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java
index de47ddb..20f23ff 100644
--- a/src/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java
+++ b/src/app/src/main/java/net/micode/notes/ui/NoteEditActivity.java
@@ -77,7 +77,7 @@ import java.util.regex.Pattern;
 public class NoteEditActivity extends Activity implements OnClickListener,
         NoteSettingChangedListener, OnTextViewChangeListener {
     private class HeadViewHolder {
-        //
+
         public TextView tvModified;
 
         public ImageView ivAlertIcon;