diff --git a/Notes-master2/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java b/Notes-master2/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java
index 9b3128f..a954fa4 100644
--- a/Notes-master2/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java
+++ b/Notes-master2/app/src/main/java/net/micode/notes/ui/NotesPreferenceActivity.java
@@ -326,6 +326,10 @@ public class NotesPreferenceActivity extends PreferenceActivity {
         return accountManager.getAccountsByType("com.google");
     }
 
+    /**
+     * 设置同步用户
+     * @param account 同步用户参数
+     */
     private void setSyncAccount(String account) {
         if (!getSyncAccountName(this).equals(account)) {
             SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
@@ -356,16 +360,23 @@ public class NotesPreferenceActivity extends PreferenceActivity {
         }
     }
 
+    /**
+     * 删除同步用户
+     */
     private void removeSyncAccount() {
+        //设置共享首选项
         SharedPreferences settings = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
         SharedPreferences.Editor editor = settings.edit();
+        //假如当前首选项有账户就删除
         if (settings.contains(PREFERENCE_SYNC_ACCOUNT_NAME)) {
             editor.remove(PREFERENCE_SYNC_ACCOUNT_NAME);
         }
+        //删除当前首选项中有账户时间
         if (settings.contains(PREFERENCE_LAST_SYNC_TIME)) {
             editor.remove(PREFERENCE_LAST_SYNC_TIME);
         }
-        editor.commit();
+        //提交数据
+        editor.apply();
 
         // clean up local gtask related info
         new Thread(new Runnable() {