diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 35a5d31..5bea14c 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -26,29 +26,22 @@
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   <component name="ChangeListManager">
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-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/.idea/libraries/avoscloud_sdk_v3_14_4.xml" />
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/.idea/libraries/fastjson_1_1_39_leancloud.xml" />
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/.idea/libraries/okhttp_2_6_0_leancloud.xml" />
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/.idea/libraries/okio_1_6_0_leancloud.xml" />
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java" />
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/app/src/main/res/layout/activity_login.xml" />
+      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/RankActivity.java" />
+      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/app/src/main/res/layout/activity_rank.xml" />
+      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/app/src/main/res/layout/ranklist.xml" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
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       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/build.gradle" afterPath="$PROJECT_DIR$/app/build.gradle" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/AndroidManifest.xml" afterPath="$PROJECT_DIR$/app/src/main/AndroidManifest.xml" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/AcidActivity.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/AcidActivity.java" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/App.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/App.java" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/CardLayoutFragment.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/CardLayoutFragment.java" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MainActivity.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MainActivity.java" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MassActivity.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MassActivity.java" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java" afterPath="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java" />
+      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/res/layout/fragment_card_layout.xml" afterPath="$PROJECT_DIR$/app/src/main/res/layout/fragment_card_layout.xml" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/res/values-en/strings.xml" afterPath="$PROJECT_DIR$/app/src/main/res/values-en/strings.xml" />
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       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/app/src/main/res/xml/settings_general.xml" afterPath="$PROJECT_DIR$/app/src/main/res/xml/settings_general.xml" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/build.gradle" afterPath="$PROJECT_DIR$/build.gradle" />
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     <ignored path="Chemical-Tools-for-Android.iws" />
     <ignored path=".idea/workspace.xml" />
@@ -86,107 +79,158 @@
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                 <element signature="imports" expanded="true" />
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-        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java">
+      <file leaf-file-name="AndroidManifest.xml" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/app/src/main/AndroidManifest.xml">
+          <provider editor-type-id="android-manifest">
+            <state />
+          </provider>
           <provider selected="true" editor-type-id="text-editor">
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-        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MainActivity.java">
+      <file leaf-file-name="build.gradle" pinned="false" current-in-tab="false">
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-        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/AcidActivity.java">
+      <file leaf-file-name="activity_rank.xml" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_rank.xml">
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-        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java">
+      <file leaf-file-name="mainmenu.xml" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/res/menu/mainmenu.xml">
+          <provider editor-type-id="android-designer2">
+            <state />
+          </provider>
           <provider selected="true" editor-type-id="text-editor">
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+              <folding />
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-      <file leaf-file-name="SettingsActivity.java" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java">
+      <file leaf-file-name="ExamActivity.java" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java">
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-      <file leaf-file-name="build.gradle" pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/app/build.gradle">
+      <file leaf-file-name="ranklist.xml" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/ranklist.xml">
+          <provider editor-type-id="android-designer2">
+            <state />
+          </provider>
           <provider selected="true" editor-type-id="text-editor">
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-        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MassActivity.java">
+      <file leaf-file-name="RankActivity.java" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/RankActivity.java">
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+      </file>
+      <file leaf-file-name="MainActivity.java" pinned="false" current-in-tab="false">
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+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="SettingsActivity.java" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="209">
+              <caret line="308" column="5" selection-start-line="296" selection-start-column="4" selection-end-line="308" selection-end-column="5" />
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+                <element signature="imports" expanded="true" />
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+                <element signature="e#9350#10604#0" expanded="true" />
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@@ -199,8 +243,8 @@
       <list>
         <option value="resourceFile" />
         <option value="valueResourceFile" />
-        <option value="layoutResourceFile_vertical" />
         <option value="ASClass" />
+        <option value="layoutResourceFile_vertical" />
       </list>
     </option>
   </component>
@@ -1582,7 +1626,7 @@
     <option name="modificationStamps">
       <map>
         <entry key="$PROJECT_DIR$" value="4409885162417" />
-        <entry key="F:\GitHub\Chemical-Tools-for-Android" value="4412467743294" />
+        <entry key="F:\GitHub\Chemical-Tools-for-Android" value="4412748050758" />
       </map>
     </option>
     <option name="projectBuildClasspath">
@@ -1848,9 +1892,6 @@
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
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-        <option value="$PROJECT_DIR$/app/src/main/res/layout/activity_settings.xml" />
-        <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/PreferenceUtils.java" />
-        <option value="$PROJECT_DIR$/app/src/main/res/values/aboutlibraries_description.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/values-en/strings.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/values/settings_pref.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/values/colors.xml" />
@@ -1860,13 +1901,11 @@
         <option value="$PROJECT_DIR$/app/build/intermediates/res/merged/debug/values/values.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/drawable/card_background_selector.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/drawable/card_state_pressed.xml" />
-        <option value="$PROJECT_DIR$/app/src/main/res/layout/fragment_card_layout.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/drawable/card_background.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/drawable/selectable_background.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/drawable/shadow_drawable.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/layout/list_item_card.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/layout/activity_mass.xml" />
-        <option value="$PROJECT_DIR$/app/src/main/res/menu/mainmenu.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/values/doyouknow.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/values/array.xml" />
         <option value="$PROJECT_DIR$/app/src/main/res/layout/activity_main.xml" />
@@ -1886,25 +1925,30 @@
         <option value="$PROJECT_DIR$/gradle.properties" />
         <option value="$PROJECT_DIR$/app/src/main/res/values-zh/strings.xml" />
         <option value="$PROJECT_DIR$/build.gradle" />
-        <option value="$PROJECT_DIR$/app/src/main/AndroidManifest.xml" />
-        <option value="$PROJECT_DIR$/app/src/main/res/xml/settings_general.xml" />
-        <option value="$PROJECT_DIR$/app/src/main/res/values/strings.xml" />
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         <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/AcidActivity.java" />
-        <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java" />
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         <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MassActivity.java" />
+        <option value="$PROJECT_DIR$/app/src/main/res/values/strings.xml" />
         <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java" />
+        <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java" />
+        <option value="$PROJECT_DIR$/app/src/main/res/xml/settings_general.xml" />
         <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java" />
+        <option value="$PROJECT_DIR$/app/src/main/res/layout/fragment_card_layout.xml" />
+        <option value="$PROJECT_DIR$/app/src/main/res/layout/activity_rank.xml" />
+        <option value="$PROJECT_DIR$/app/src/main/res/menu/mainmenu.xml" />
+        <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java" />
+        <option value="$PROJECT_DIR$/app/src/main/res/layout/ranklist.xml" />
+        <option value="$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/RankActivity.java" />
+        <option value="$PROJECT_DIR$/app/src/main/AndroidManifest.xml" />
         <option value="$PROJECT_DIR$/app/build.gradle" />
       </list>
     </option>
   </component>
   <component name="ProjectFrameBounds">
-    <option name="x" value="-8" />
-    <option name="width" value="1378" />
+    <option name="x" value="-7" />
+    <option name="width" value="1370" />
     <option name="height" value="735" />
   </component>
   <component name="ProjectInspectionProfilesVisibleTreeState">
@@ -1966,10 +2010,10 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
+      <pane id="AndroidView" />
+      <pane id="Scratches" />
       <pane id="Scope" />
       <pane id="PackagesPane" />
-      <pane id="Scratches" />
-      <pane id="AndroidView" />
       <pane id="ProjectPane">
         <subPane>
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@@ -2154,7 +2198,7 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="values" />
+              <option name="myItemId" value="menu" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
           </PATH>
@@ -2180,11 +2224,11 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="java" />
+              <option name="myItemId" value="res" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="chemicaltools" />
+              <option name="myItemId" value="layout" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
           </PATH>
@@ -2217,10 +2261,6 @@
               <option name="myItemId" value="chemicaltools" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="wxapi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
           </PATH>
           <PATH>
             <PATH_ELEMENT>
@@ -2236,7 +2276,23 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="libs" />
+              <option name="myItemId" value="src" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="main" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="java" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="chemicaltools" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="wxapi" />
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
             </PATH_ELEMENT>
           </PATH>
@@ -2260,10 +2316,11 @@
     <property name="UI_DESIGNER_EDITOR_MODE.NlPaletteManager-NlEditorPanel.WIDTH" value="297" />
   </component>
   <component name="RecentsManager">
-    <key name="CopyFile.RECENT_KEYS">
-      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res\layout" />
-      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res\raw" />
-      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res\values-zh" />
+    <key name="MoveFile.RECENT_KEYS">
+      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\java" />
+      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res\values-en" />
+      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res" />
+      <recent name="F:\GitHub\Chemical-Tools-for-Android\app" />
     </key>
     <key name="MoveClassesOrPackagesDialog.RECENTS_KEY">
       <recent name="com.njzjz.chemicaltools" />
@@ -2276,11 +2333,10 @@
     <key name="android.template.parentActivityClass">
       <recent name="" />
     </key>
-    <key name="MoveFile.RECENT_KEYS">
-      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\java" />
-      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res\values-en" />
-      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res" />
-      <recent name="F:\GitHub\Chemical-Tools-for-Android\app" />
+    <key name="CopyFile.RECENT_KEYS">
+      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res\layout" />
+      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res\raw" />
+      <recent name="F:\GitHub\Chemical-Tools-for-Android\app\src\main\res\values-zh" />
     </key>
   </component>
   <component name="RunManager" selected="Android App.app">
@@ -2876,35 +2932,42 @@
       <option name="project" value="LOCAL" />
       <updated>1475599115708</updated>
     </task>
-    <option name="localTasksCounter" value="22" />
+    <task id="LOCAL-00022" summary="v1.64 云同步：在任意一台设备上查看结果">
+      <created>1475677616144</created>
+      <option name="number" value="00022" />
+      <option name="presentableId" value="LOCAL-00022" />
+      <option name="project" value="LOCAL" />
+      <updated>1475677616144</updated>
+    </task>
+    <option name="localTasksCounter" value="23" />
     <servers />
   </component>
   <component name="ToolWindowManager">
-    <frame x="-8" y="0" width="1378" height="735" extended-state="0" />
+    <frame x="-7" y="0" width="1370" height="735" extended-state="0" />
     <editor active="true" />
     <layout>
       <window_info id="Nl-Palette" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="Build Variants" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32980332" sideWeight="0.5" order="5" side_tool="true" content_ui="tabs" />
-      <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.114583336" sideWeight="0.5060698" order="11" side_tool="true" content_ui="tabs" />
-      <window_info id="Android Monitor" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.3298611" sideWeight="0.4757208" order="12" side_tool="false" content_ui="tabs" />
+      <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.30208334" sideWeight="0.570229" order="11" side_tool="true" content_ui="tabs" />
+      <window_info id="Android Monitor" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.3298611" sideWeight="0.46946564" order="12" side_tool="false" content_ui="tabs" />
       <window_info id="Properties" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
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+      <window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.3125" sideWeight="0.44656488" order="8" side_tool="false" content_ui="tabs" />
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+      <window_info id="Messages" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.30208334" sideWeight="0.429771" order="13" side_tool="false" content_ui="tabs" />
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+      <window_info id="Preview" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32980332" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
+      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.3263889" sideWeight="0.3908397" order="7" side_tool="false" content_ui="tabs" />
+      <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.3263889" sideWeight="0.49092284" order="15" side_tool="false" content_ui="tabs" />
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       <window_info id="Captures" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.24962178" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" />
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-      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.24127465" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
-      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.114583336" sideWeight="0.4939302" order="6" side_tool="false" content_ui="tabs" />
+      <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.2389313" sideWeight="0.5" order="0" side_tool="false" content_ui="combo" />
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       <window_info id="Theme Preview" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
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@@ -2917,9 +2980,9 @@
       <window_info id="Ant Build" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="5" side_tool="false" content_ui="tabs" />
       <window_info id="调试" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.34358975" sideWeight="0.4969743" order="1" side_tool="false" content_ui="tabs" />
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-      <window_info id="Preview" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32980332" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="消息" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32991454" sideWeight="0.49092284" order="2" side_tool="false" content_ui="tabs" />
       <window_info id="运行" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32991454" sideWeight="0.4924357" order="3" side_tool="false" content_ui="tabs" />
+      <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.114583336" sideWeight="0.4939302" order="6" side_tool="false" content_ui="tabs" />
       <window_info id="找到" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32991454" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
     </layout>
     <layout-to-restore>
@@ -2995,11 +3058,12 @@
     <MESSAGE value="v1.61 酸碱计算功能①录入了一些常见物质的pKa/pKb，再也不用自己记了 ②修复了未考虑水的拉平效应的bug" />
     <MESSAGE value="v1.62 ①元素查询功能加入维基百科链接②质量计算和酸碱计算功能中的化学式可以显示上标和下标了" />
     <MESSAGE value="v1.63 重构分享功能" />
-    <option name="LAST_COMMIT_MESSAGE" value="v1.63 重构分享功能" />
+    <MESSAGE value="v1.64 云同步：在任意一台设备上查看结果" />
+    <option name="LAST_COMMIT_MESSAGE" value="v1.64 云同步：在任意一台设备上查看结果" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
-      <option name="time" value="370" />
+      <option name="time" value="470" />
     </breakpoint-manager>
     <watches-manager>
       <configuration name="app">
@@ -3029,6 +3093,9 @@
         <watch expression="mPassword" />
         <watch expression="e1" />
         <watch expression="loginsuccess[0]" />
+        <watch expression="data" />
+        <watch expression="userlist" />
+        <watch expression="name" />
       </configuration>
       <configuration name="MainActivity">
         <watch expression="elementInput" />
@@ -3036,55 +3103,6 @@
     </watches-manager>
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/drawable/ic_menu_share.png">
-      <provider selected="true" editor-type-id="images">
-        <state />
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/mipmap-hdpi/ic_launcher.png" />
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/menu/mainmenu.xml">
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-    <entry file="file://$PROJECT_DIR$/app/src/main/res/values/doyouknow.xml">
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-    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/fragment_card_layout.xml">
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-      <provider editor-type-id="android-designer2">
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-    <entry file="file://$PROJECT_DIR$/app/build/intermediates/res/merged/debug/values/values.xml">
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-    <entry file="file://$PROJECT_DIR$/app/src/main/res/values-en/strings.xml">
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     <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/PreferenceUtils.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
@@ -3109,25 +3127,24 @@
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_exam.xml">
+      <provider editor-type-id="android-designer2">
+        <state />
+      </provider>
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="209">
           <caret line="21" column="39" selection-start-line="21" selection-start-column="39" selection-end-line="21" selection-end-column="39" />
-          <folding />
         </state>
       </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_settings.xml">
       <provider editor-type-id="android-designer2">
         <state />
       </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_settings.xml">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
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-      <provider editor-type-id="android-designer2">
-        <state />
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     </entry>
     <entry file="file://$PROJECT_DIR$/README.md">
       <provider selected="true" editor-type-id="text-editor">
@@ -3136,46 +3153,26 @@
         </state>
       </provider>
     </entry>
-    <entry file="jar://E:/Android/sdk1/extras/android/m2repository/com/android/support/appcompat-v7/23.4.0/appcompat-v7-23.4.0-sources.jar!/android/support/v7/app/AppCompatActivity.java">
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-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/list_item_card.xml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="41">
-          <caret line="66" column="8" selection-start-line="66" selection-start-column="8" selection-end-line="68" selection-end-column="46" />
-        </state>
-      </provider>
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_title.xml">
       <provider editor-type-id="android-designer2">
         <state />
       </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_title.xml">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="197">
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           <folding />
         </state>
       </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_mass.xml">
       <provider editor-type-id="android-designer2">
         <state />
       </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_mass.xml">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="152">
           <caret line="25" column="17" selection-start-line="25" selection-start-column="17" selection-end-line="25" selection-end-column="17" />
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-          </folding>
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-      <provider editor-type-id="android-designer2">
-        <state />
-      </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/app/src/main/res/values/acid.xml">
       <provider selected="true" editor-type-id="text-editor">
@@ -3186,26 +3183,14 @@
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_acid.xml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="340">
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       <provider editor-type-id="android-designer2">
         <state />
       </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_main.xml">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="1330">
-          <caret line="70" column="0" selection-start-line="70" selection-start-column="0" selection-end-line="70" selection-end-column="0" />
-          <folding />
+        <state relative-caret-position="340">
+          <caret line="47" column="15" selection-start-line="47" selection-start-column="15" selection-end-line="47" selection-end-column="15" />
         </state>
       </provider>
-      <provider editor-type-id="android-designer2">
-        <state />
-      </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_share_all.xml" />
     <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/app/BaseActivity.java" />
@@ -3233,7 +3218,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="19">
           <caret line="71" column="0" selection-start-line="71" selection-start-column="0" selection-end-line="71" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -3264,10 +3248,7 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-          <folding>
-            <element signature="e#12077#15782#0" expanded="true" />
-            <element signature="e#15781#15782#0" expanded="true" />
-          </folding>
+          <folding />
         </state>
       </provider>
     </entry>
@@ -3286,14 +3267,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/values/strings.xml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="249">
-          <caret line="90" column="52" selection-start-line="90" selection-start-column="52" selection-end-line="90" selection-end-column="52" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/CardLayoutFragment.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="323">
@@ -3304,142 +3277,267 @@
         </state>
       </provider>
     </entry>
-    <entry file="android-dummy://F:/GitHub/Chemical-Tools-for-Android//app/Translations Editor">
-      <provider selected="true" editor-type-id="string-resource-editor">
-        <state />
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/AcidActivity.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="2793">
+          <caret line="180" column="53" selection-start-line="180" selection-start-column="53" selection-end-line="180" selection-end-column="53" />
+          <folding>
+            <element signature="imports" expanded="true" />
+            <marker date="1475675569451" expanded="false" signature="17138:17166" ph="&quot;Chemical Tools&quot;" />
+          </folding>
+        </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/AndroidManifest.xml">
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MassActivity.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="228">
-          <caret line="106" column="11" selection-start-line="106" selection-start-column="11" selection-end-line="106" selection-end-column="11" />
+        <state relative-caret-position="3857">
+          <caret line="231" column="53" selection-start-line="231" selection-start-column="53" selection-end-line="231" selection-end-column="53" />
           <folding>
-            <marker date="1475656370825" expanded="true" signature="4616:4635" ph="..." />
+            <marker date="1475675569419" expanded="false" signature="15101:15129" ph="&quot;Chemical Tools&quot;" />
           </folding>
         </state>
       </provider>
-      <provider editor-type-id="android-manifest">
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/values/umeng_socialize_strings.xml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="141">
+          <caret line="48" column="50" selection-start-line="48" selection-start-column="48" selection-end-line="48" selection-end-column="50" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="android-dummy://F:/GitHub/Chemical-Tools-for-Android//app/Translations Editor">
+      <provider selected="true" editor-type-id="string-resource-editor">
         <state />
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/xml/settings_general.xml">
+    <entry file="jar://E:/Android/sdk1/extras/android/m2repository/com/android/support/appcompat-v7/23.4.0/appcompat-v7-23.4.0-sources.jar!/android/support/v7/app/AppCompatActivity.java">
       <provider selected="true" editor-type-id="text-editor">
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-            <element signature="e#218#240#0" expanded="false" />
-            <element signature="e#388#410#0" expanded="false" />
-            <element signature="e#658#695#0" expanded="false" />
-          </folding>
+        <state relative-caret-position="133">
+          <caret line="69" column="19" selection-start-line="69" selection-start-column="19" selection-end-line="69" selection-end-column="19" />
+          <folding />
         </state>
       </provider>
-      <provider editor-type-id="android-designer2">
-        <state />
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="437">
+          <caret line="254" column="66" selection-start-line="254" selection-start-column="66" selection-end-line="254" selection-end-column="66" />
+          <folding />
+        </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/App.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="304">
-          <caret line="29" column="0" selection-start-line="29" selection-start-column="0" selection-end-line="29" selection-end-column="0" />
+        <state relative-caret-position="96">
+          <caret line="28" column="0" selection-start-line="28" selection-start-column="0" selection-end-line="28" selection-end-column="0" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java">
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/values/strings.xml">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="399">
-          <caret line="95" column="57" selection-start-line="95" selection-start-column="57" selection-end-line="95" selection-end-column="57" />
-          <folding>
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-            <element signature="e#3508#6769#0" expanded="true" />
-            <element signature="e#6768#6769#0" expanded="true" />
-          </folding>
+        <state relative-caret-position="171">
+          <caret line="86" column="46" selection-start-line="86" selection-start-column="46" selection-end-line="86" selection-end-column="46" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java">
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/xml/settings_general.xml">
+      <provider editor-type-id="android-designer2">
+        <state />
+      </provider>
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="39">
-          <caret line="52" column="53" selection-start-line="52" selection-start-column="53" selection-end-line="52" selection-end-column="53" />
+        <state relative-caret-position="133">
+          <caret line="7" column="11" selection-start-line="7" selection-start-column="11" selection-end-line="7" selection-end-column="11" />
           <folding>
-            <element signature="e#1603#3185#0" expanded="true" />
-            <element signature="e#3184#3185#0" expanded="true" />
-            <element signature="e#7776#7831#0" expanded="true" />
-            <marker date="1475675569466" expanded="false" signature="15628:15656" ph="&quot;Chemical Tools&quot;" />
-            <marker date="1475675569466" expanded="true" signature="16376:16404" ph="&quot;Chemical Tools&quot;" />
+            <element signature="e#322#342#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MainActivity.java">
+    <entry file="jar://$PROJECT_DIR$/app/libs/umeng_social_apiv6.0.0.jar!/com/umeng/socialize/UMAuthListener.class">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="144">
+          <caret line="25" column="9" selection-start-line="25" selection-start-column="9" selection-end-line="25" selection-end-column="9" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="226">
-          <caret line="122" column="50" selection-start-line="122" selection-start-column="50" selection-end-line="122" selection-end-column="50" />
+        <state relative-caret-position="209">
+          <caret line="308" column="5" selection-start-line="296" selection-start-column="4" selection-end-line="308" selection-end-column="5" />
           <folding>
             <element signature="imports" expanded="true" />
-            <element signature="e#6469#7610#0" expanded="true" />
-            <element signature="e#7609#7610#0" expanded="true" />
+            <element signature="e#1784#3567#0" expanded="true" />
+            <element signature="e#3566#3567#0" expanded="true" />
+            <element signature="e#4295#5073#0" expanded="true" />
+            <element signature="e#5072#5073#0" expanded="true" />
+            <element signature="e#5325#5360#0" expanded="true" />
+            <element signature="e#6251#6285#0" expanded="true" />
+            <element signature="e#6669#7147#0" expanded="true" />
+            <element signature="e#7146#7147#0" expanded="true" />
+            <element signature="e#7879#8286#0" expanded="true" />
+            <element signature="e#8090#8122#0" expanded="true" />
+            <element signature="e#8285#8286#0" expanded="true" />
+            <element signature="e#8391#8694#0" expanded="true" />
+            <element signature="e#8693#8694#0" expanded="true" />
+            <element signature="e#8792#9238#0" expanded="true" />
+            <element signature="e#9237#9238#0" expanded="true" />
+            <element signature="e#9350#10604#0" expanded="true" />
+            <element signature="e#10603#10604#0" expanded="true" />
+            <element signature="e#11740#12940#0" expanded="true" />
+            <element signature="e#12939#12940#0" expanded="true" />
+            <element signature="e#13400#14471#0" expanded="true" />
+            <element signature="e#14470#14471#0" expanded="true" />
+            <element signature="e#14903#15850#0" expanded="true" />
+            <element signature="e#15849#15850#0" expanded="true" />
+            <element signature="e#17296#17326#0" expanded="true" />
+            <element signature="e#17356#17380#0" expanded="true" />
+            <element signature="e#17443#17466#0" expanded="true" />
+            <element signature="e#17468#21324#0" expanded="true" />
+            <element signature="e#21323#21324#0" expanded="true" />
+            <element signature="e#21361#21385#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/AcidActivity.java">
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/list_item_card.xml">
+      <provider editor-type-id="android-designer2">
+        <state />
+      </provider>
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="240">
-          <caret line="180" column="53" selection-start-line="180" selection-start-column="53" selection-end-line="180" selection-end-column="53" />
+        <state relative-caret-position="190">
+          <caret line="52" column="43" selection-start-line="52" selection-start-column="43" selection-end-line="52" selection-end-column="43" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/fragment_card_layout.xml">
+      <provider editor-type-id="android-designer2">
+        <state />
+      </provider>
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="114">
+          <caret line="6" column="3" selection-start-line="6" selection-start-column="3" selection-end-line="15" selection-end-column="50" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/menu/mainmenu.xml">
+      <provider editor-type-id="android-designer2">
+        <state />
+      </provider>
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="181">
+          <caret line="23" column="35" selection-start-line="23" selection-start-column="35" selection-end-line="23" selection-end-column="35" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_rank.xml">
+      <provider editor-type-id="android-designer2">
+        <state />
+      </provider>
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="114">
+          <caret line="6" column="18" selection-start-line="6" selection-start-column="18" selection-end-line="6" selection-end-column="18" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/ranklist.xml">
+      <provider editor-type-id="android-designer2">
+        <state />
+      </provider>
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="190">
+          <caret line="19" column="46" selection-start-line="19" selection-start-column="46" selection-end-line="19" selection-end-column="46" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="209">
+          <caret line="62" column="92" selection-start-line="62" selection-start-column="75" selection-end-line="62" selection-end-column="92" />
           <folding>
-            <element signature="imports" expanded="true" />
-            <element signature="e#9292#9861#0" expanded="true" />
-            <element signature="e#9860#9861#0" expanded="true" />
-            <marker date="1475675569451" expanded="false" signature="17138:17166" ph="&quot;Chemical Tools&quot;" />
+            <element signature="e#14970#15001#0" expanded="true" />
+            <marker date="1475951968558" expanded="false" signature="15754:15782" ph="&quot;Chemical Tools&quot;" />
+            <marker date="1475951968558" expanded="true" signature="16502:16530" ph="&quot;Chemical Tools&quot;" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MassActivity.java">
+    <entry file="file://$PROJECT_DIR$/app/src/main/res/layout/activity_main.xml">
+      <provider editor-type-id="android-designer2">
+        <state />
+      </provider>
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="195">
+          <caret line="83" column="0" selection-start-line="83" selection-start-column="0" selection-end-line="83" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/MainActivity.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="114">
-          <caret line="231" column="53" selection-start-line="231" selection-start-column="53" selection-end-line="231" selection-end-column="53" />
+          <caret line="44" column="17" selection-start-line="44" selection-start-column="0" selection-end-line="45" selection-end-column="0" />
           <folding>
-            <element signature="e#11621#12222#0" expanded="true" />
-            <element signature="e#12221#12222#0" expanded="true" />
-            <marker date="1475675569419" expanded="false" signature="15101:15129" ph="&quot;Chemical Tools&quot;" />
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java">
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/RankActivity.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="418">
-          <caret line="351" column="51" selection-start-line="351" selection-start-column="51" selection-end-line="351" selection-end-column="51" />
+        <state relative-caret-position="133">
+          <caret line="42" column="39" selection-start-line="42" selection-start-column="39" selection-end-line="42" selection-end-column="39" />
           <folding>
-            <element signature="e#12077#15782#0" expanded="true" />
-            <element signature="e#15781#15782#0" expanded="true" />
+            <element signature="imports" expanded="true" />
+            <element signature="e#995#3442#0" expanded="true" />
+            <element signature="e#1291#1316#0" expanded="true" />
+            <element signature="e#1450#1466#0" expanded="true" />
+            <element signature="e#3441#3442#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java">
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="267">
-          <caret line="58" column="60" selection-start-line="58" selection-start-column="60" selection-end-line="58" selection-end-column="60" />
+        <state relative-caret-position="133">
+          <caret line="313" column="0" selection-start-line="313" selection-start-column="0" selection-end-line="313" selection-end-column="0" />
           <folding>
-            <element signature="e#1574#2791#0" expanded="true" />
-            <element signature="e#2790#2791#0" expanded="true" />
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/app/build.gradle">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="228">
-          <caret line="12" column="25" selection-start-line="12" selection-start-column="25" selection-end-line="12" selection-end-column="25" />
+        <state relative-caret-position="266">
+          <caret line="14" column="16" selection-start-line="14" selection-start-column="16" selection-end-line="14" selection-end-column="16" />
           <folding />
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/AndroidManifest.xml">
+      <provider editor-type-id="android-manifest">
+        <state />
+      </provider>
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="38">
+          <caret line="100" column="0" selection-start-line="100" selection-start-column="0" selection-end-line="100" selection-end-column="0" />
+          <folding>
+            <element signature="e#4660#4681#0" expanded="true" />
+            <marker date="1475956557948" expanded="true" signature="4692:4711" ph="..." />
+          </folding>
+        </state>
+      </provider>
+    </entry>
   </component>
 </project>
\ No newline at end of file
diff --git a/app/app.iml b/app/app.iml
index c209408..a153347 100644
--- a/app/app.iml
+++ b/app/app.iml
@@ -84,6 +84,7 @@
       <sourceFolder url="file://$MODULE_DIR$/src/androidTest/shaders" isTestSource="true" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/assets" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/blame" />
+      <excludeFolder url="file://$MODULE_DIR$/build/intermediates/builds" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/classes" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/dependency-cache" />
       <excludeFolder url="file://$MODULE_DIR$/build/intermediates/exploded-aar/com.android.support/animated-vector-drawable/23.4.0/jars" />
diff --git a/app/build.gradle b/app/build.gradle
index a7a335c..ea66694 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -9,8 +9,8 @@ android {
         applicationId "com.njzjz.chemicaltools"
         minSdkVersion 15
         targetSdkVersion 23
-        versionCode 22
-        versionName "1.64"
+        versionCode 23
+        versionName "1.66"
     }
     buildTypes {
         release {
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index dfbd191..19f1857 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -97,11 +97,12 @@
 
         <meta-data
             android:name="UMENG_APPKEY"
-            android:value="57f39f45e0f55a55be0043f3"></meta-data>
+            android:value="57f39f45e0f55a55be0043f3" />
 
         <activity
             android:name=".LoginActivity"
-            android:label="@string/title_activity_login"></activity>
+            android:label="@string/title_activity_login" />
+        <activity android:name=".RankActivity" android:label="@string/button_rank"></activity>
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java b/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java
index 9b32eca..7627dea 100644
--- a/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java
+++ b/app/src/main/java/com/njzjz/chemicaltools/ExamActivity.java
@@ -33,7 +33,7 @@
 import java.util.List;
 
 public class ExamActivity extends AppCompatActivity {
-
+    private static final int action_rank = Menu.FIRST;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -283,6 +283,7 @@ protected void onPause() {
     public boolean onCreateOptionsMenu(Menu menu) {
         MenuInflater inflater = getMenuInflater();
         inflater.inflate(R.menu.mainmenu, menu);
+        menu.add(0, action_rank, 100, getString(R.string.button_rank));
         return super.onCreateOptionsMenu(menu);
     }
     @Override
@@ -327,6 +328,9 @@ public boolean onOptionsItemSelected(MenuItem item) {
             case R.id.action_About:
                 new Libs.Builder().withActivityTitle(getString(R.string.button_About)).withFields(R.string.class.getFields()).start(ExamActivity.this);
                 return true;
+            case action_rank:
+                openrank();
+                return true;
             default:
                 return super.onOptionsItemSelected(item);
         }
@@ -335,6 +339,10 @@ public void openSettings(){
         Intent intent =new Intent(this, SettingsActivity.class);
         startActivityForResult(intent,1000);
     }
+    public void openrank(){
+        Intent intent =new Intent(this, RankActivity.class);
+        startActivity(intent);
+    }
     @Override
     protected void onActivityResult(int requestCode,int resultCode,Intent data){
         super.onActivityResult(requestCode,resultCode,data);
diff --git a/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java b/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java
index cfbb033..7a83480 100644
--- a/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java
+++ b/app/src/main/java/com/njzjz/chemicaltools/LoginActivity.java
@@ -331,6 +331,10 @@ public void done(AVUser avUser, AVException e1) {
                             @Override
                             public void done(AVObject avObject, AVException e) {
                                 // 调用 fetchIfNeededInBackground 和 refreshInBackground 效果是一样的。
+                                String qqid=avObject.getString("qqid");
+                                String qqname=avObject.getString("qqname");
+                                //String wechatid=avObject.getString("wechatid");
+                                //String wechatname=avObject.getString("wechatname");
                                 String historyElementOutput=avObject.getString("historyElementOutput");
                                 String historyElementOutputHtml=avObject.getString("historyElementOutputHtml");
                                 String historyElementNumber=avObject.getString("historyElementNumber");
@@ -348,9 +352,12 @@ public void done(AVObject avObject, AVException e) {
                                 String examMode=avObject.getString("examMode");
                                 if(examMode==null)examMode="0";
                                 Boolean setting_examOptionMode=avObject.getBoolean("setting_examOptionMode");
-                                if(setting_examOptionMode==null)setting_examOptionMode=false;
                                 String pKw=avObject.getString("pKw");
                                 if(pKw==null)pKw="14";
+                                PreferenceUtils.setPrefString(getApplicationContext(),"qqid",qqid);
+                                PreferenceUtils.setPrefString(getApplicationContext(),"qqname",qqname);
+                                //PreferenceUtils.setPrefString(getApplicationContext(),"wechatid",wechatid);
+                                //PreferenceUtils.setPrefString(getApplicationContext(),"wechatname",wechatname);
                                 PreferenceUtils.setPrefString(getApplicationContext(),"historyElementOutput",historyElementOutput);
                                 PreferenceUtils.setPrefString(getApplicationContext(),"historyElementOutputHtml",historyElementOutputHtml);
                                 PreferenceUtils.setPrefString(getApplicationContext(),"historyElementNumber",historyElementNumber);
diff --git a/app/src/main/java/com/njzjz/chemicaltools/RankActivity.java b/app/src/main/java/com/njzjz/chemicaltools/RankActivity.java
new file mode 100644
index 0000000..624bf37
--- /dev/null
+++ b/app/src/main/java/com/njzjz/chemicaltools/RankActivity.java
@@ -0,0 +1,98 @@
+package com.njzjz.chemicaltools;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v7.app.ActionBar;
+import android.support.v7.app.AppCompatActivity;
+import android.view.MenuItem;
+import android.widget.ListView;
+import android.widget.SimpleAdapter;
+
+import com.avos.avoscloud.AVException;
+import com.avos.avoscloud.AVQuery;
+import com.avos.avoscloud.AVUser;
+import com.avos.avoscloud.FindCallback;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+public class RankActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_rank);
+        ActionBar ab = getSupportActionBar();
+        ab.setDisplayShowHomeEnabled(true);
+        ab.setDisplayHomeAsUpEnabled(true);
+        ab.setHomeButtonEnabled(true);
+
+        AVQuery<AVUser> userQuery = new AVQuery<>("_User");
+        userQuery.findInBackground(new FindCallback<AVUser>() {
+            @Override
+            public void done(List<AVUser> list, AVException e) {
+                List<AVUser> userlist = list;// 符合 priority = 0 的 Todo 数组
+
+                //生成动态数组，并且转载数据
+                ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
+                for(int i=0;i<userlist.size();i++)
+                {
+                    HashMap<String, String> map = new HashMap<String, String>();
+                    String score_str=userlist.get(i).getString("examCorrectNumber");
+                    int score=Integer.parseInt(userlist.get(i).getString("examCorrectNumber"));
+                    if(score>0) {
+                        String name=userlist.get(i).getString("qqname");
+                        if(name==null){
+                            name=userlist.get(i).getUsername();
+                            name=name.substring(0, name.indexOf("@"));
+                        }
+                        map.put("text1", name);
+                        map.put("text2", score_str);
+                        mylist.add(map);
+                    }
+                }
+
+                //冒泡排序
+                int i, j, len = mylist.size();
+                HashMap<String, String> temp;
+                for (i = 0; i < len - 1; i++)
+                    for (j = 0; j < len - 1 - i; j++)
+                        if (Integer.parseInt(mylist.get(j).get("text2")) < Integer.parseInt(mylist.get(j+1).get("text2"))) {
+                            temp = mylist.get(j);
+                            mylist.set(j,mylist.get(j+1));
+                            mylist.set(j+1, temp);
+                        }
+                for(i=0;i<len;i++) mylist.get(i).put("number", String.valueOf(i + 1));
+
+                //生成适配器，数组===》ListItem
+                SimpleAdapter mSchedule = new SimpleAdapter(RankActivity.this, //没什么解释
+                        mylist,//数据来源
+                        R.layout.ranklist,//ListItem的XML实现
+
+                        //动态数组与ListItem对应的子项
+                        new String[] {"number","text1", "text2"},
+
+                        //ListItem的XML文件里面的两个TextView ID
+                        new int[] {R.id.list_item_card_number,R.id.list_item_card_text1,R.id.list_item_card_text2});
+                //添加并且显示
+                ListView rank_list = (ListView) findViewById(R.id.rank_list);
+                rank_list.setAdapter(mSchedule);
+            }
+        });
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            //菜单栏返回键功能
+            case android.R.id.home:
+                Intent intent = new Intent(this, TitleActivity.class);
+                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+                this.finish();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+}
diff --git a/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java b/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java
index ac2707e..7a62039 100644
--- a/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java
+++ b/app/src/main/java/com/njzjz/chemicaltools/SettingsActivity.java
@@ -17,10 +17,12 @@
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AlertDialog;
 import android.support.v7.app.AppCompatActivity;
+import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.Toast;
 
 import com.avos.avoscloud.AVException;
 import com.avos.avoscloud.AVObject;
@@ -29,6 +31,11 @@
 import com.mikepenz.aboutlibraries.Libs;
 import com.sangbo.autoupdate.CheckVersion;
 import com.tencent.stat.StatService;
+import com.umeng.socialize.UMAuthListener;
+import com.umeng.socialize.UMShareAPI;
+import com.umeng.socialize.bean.SHARE_MEDIA;
+
+import java.util.Map;
 
 public class SettingsActivity extends AppCompatActivity {
     @Override
@@ -47,20 +54,27 @@ protected void onCreate(Bundle savedInstanceState) {
                 @Override
                 public void done(AVObject avObject, AVException e) {
                     // 调用 fetchIfNeededInBackground 和 refreshInBackground 效果是一样的。
+                    String qqid=avObject.getString("qqid");
+                    String qqname=avObject.getString("qqname");
+                   // String wechatid=avObject.getString("wechatid");
+                    //String wechatname=avObject.getString("wechatname");
                     String elementnumber_limit=avObject.getString("elementnumber_limit");
                     if(elementnumber_limit==null)elementnumber_limit="118";
                     String examMode=avObject.getString("examMode");
                     if(examMode==null)examMode="0";
                     Boolean setting_examOptionMode=avObject.getBoolean("setting_examOptionMode");
-                    if(setting_examOptionMode==null)setting_examOptionMode=false;
                     String pKw=avObject.getString("pKw");
                     if(pKw==null)pKw="14";
+                    PreferenceUtils.setPrefString(getApplicationContext(),"qqid",qqid);
+                    PreferenceUtils.setPrefString(getApplicationContext(),"qqname",qqname);
+                    //PreferenceUtils.setPrefString(getApplicationContext(),"wechatid",wechatid);
+                    //PreferenceUtils.setPrefString(getApplicationContext(),"wechatname",wechatname);
                     PreferenceUtils.setPrefString(getApplicationContext(),"elementnumber_limit",elementnumber_limit);
                     PreferenceUtils.setPrefString(getApplicationContext(),"examMode",examMode);
                     PreferenceUtils.setPrefBoolean(getApplicationContext(),"setting_examOptionMode",setting_examOptionMode);
                     PreferenceUtils.setPrefString(getApplicationContext(),"pKw",pKw);
-                }});
-
+                }}
+            );
         }
 
         PreferenceFragment fragment = new PreferenceFragment() {
@@ -95,10 +109,46 @@ public void done(AVObject avObject, AVException e) {
                     // 有
                     Login.setTitle(getString(R.string.action_sign_out));
                     Login.setSummary(currentUser.getUsername());
+                    String qqid=PreferenceUtils.getPrefString(getApplicationContext(),"qqid","");
+                    if(qqid!=""){
+                        String qqname=PreferenceUtils.getPrefString(getApplicationContext(),"qqname","");
+                        findPreference("qq").setSummary(qqname);
+                    }
+                    /*
+                    String wechatid=PreferenceUtils.getPrefString(getApplicationContext(),"wechatid","");
+                    if(wechatid!=""){
+                        String wechatname=PreferenceUtils.getPrefString(getApplicationContext(),"wechatname","");
+                        findPreference("qq").setSummary(wechatname);
+                    }
+                    */
                 } else {
                     //缓存用户对象为空时，可打开用户注册界面…
                     Login.setTitle(getString(R.string.action_sign_in));
+                    findPreference("qq").setEnabled(false);
+                   // ((PreferenceGroup)findPreference("user")).removePreference(findPreference("qq"));
+                    //((PreferenceGroup)findPreference("user")).removePreference(findPreference("wechat"));
                 }
+                findPreference("qq").setOnPreferenceClickListener(
+                        new Preference.OnPreferenceClickListener() {
+                            @Override
+                            public boolean onPreferenceClick(Preference preference) {
+                                UMShareAPI  mShareAPI = UMShareAPI.get( SettingsActivity.this );
+                                mShareAPI.doOauthVerify(SettingsActivity.this, SHARE_MEDIA.QQ, umAuthListener);
+                                return true;
+                            }
+                        }
+                );
+                /*
+                findPreference("wechat").setOnPreferenceClickListener(
+                        new Preference.OnPreferenceClickListener() {
+                            @Override
+                            public boolean onPreferenceClick(Preference preference) {
+                                UMShareAPI  mShareAPI = UMShareAPI.get( SettingsActivity.this );
+                                mShareAPI.doOauthVerify(SettingsActivity.this, SHARE_MEDIA.WEIXIN, umAuthListener);
+                                return true;
+                            }
+                        }
+                );*/
                 findPreference("about").setOnPreferenceClickListener(
                         new Preference.OnPreferenceClickListener() {
                             @Override public boolean onPreferenceClick(Preference preference) {
@@ -268,6 +318,10 @@ private void showSimpleDialog(View view) {
             @Override
             public void onClick(DialogInterface dialogInterface, int i) {
                 PreferenceUtils.clearPreference(getApplicationContext(), PreferenceManager.getDefaultSharedPreferences(getApplicationContext()));
+                String qqid=PreferenceUtils.getPrefString(getApplicationContext(),"qqid","");
+                String qqname=PreferenceUtils.getPrefString(getApplicationContext(),"qqname","");
+                //String wechatid=PreferenceUtils.getPrefString(getApplicationContext(),"wechatid","");
+                //String wechatname=PreferenceUtils.getPrefString(getApplicationContext(),"wechatname","");
                 String historyElementOutput = PreferenceUtils.getPrefString(getApplicationContext(), "historyElementOutput", "");
                 String historyElementOutputHtml = PreferenceUtils.getPrefString(getApplicationContext(), "historyElementOutputHtml", "");
                 String historyElementNumber = PreferenceUtils.getPrefString(getApplicationContext(), "historyElementNumber", "0");
@@ -281,6 +335,10 @@ public void onClick(DialogInterface dialogInterface, int i) {
                 String examMode=PreferenceUtils.getPrefString(getApplicationContext(),"examMode","0");
                 Boolean setting_examOptionMode=PreferenceUtils.getPrefBoolean(getApplicationContext(),"setting_examOptionMode",false);
                 String pKw=PreferenceUtils.getPrefString(getApplicationContext(),"pKw","14");
+                AVUser.getCurrentUser().put("qqid", qqid);
+                AVUser.getCurrentUser().put("qqname", qqname);
+                //AVUser.getCurrentUser().put("wechatid", wechatid);
+                //AVUser.getCurrentUser().put("wechatname", wechatname);
                 AVUser.getCurrentUser().put("historyElementOutput", historyElementOutput);
                 AVUser.getCurrentUser().put("historyElementOutputHtml", historyElementOutputHtml);
                 AVUser.getCurrentUser().put("historyElementNumber", historyElementNumber);
@@ -314,6 +372,7 @@ public void onClick(DialogInterface dialogInterface, int i) {
     @Override
     protected void onActivityResult(int requestCode,int resultCode,Intent data){
         super.onActivityResult(requestCode,resultCode,data);
+        UMShareAPI.get(this).onActivityResult(requestCode, resultCode, data);
         if(requestCode==1002 && resultCode==1003)
             if(data.getStringExtra("result").equals("1")){
                 finish();
@@ -325,4 +384,60 @@ public void openLogin(){
         Intent intent =new Intent(this, LoginActivity.class);
         startActivityForResult(intent,1002);
     }
+    private UMAuthListener umAuthListener = new UMAuthListener() {
+        @Override
+        public void onComplete(SHARE_MEDIA platform, int action, Map<String, String> data) {
+            Toast.makeText(getApplicationContext(), "授权成功", Toast.LENGTH_SHORT).show();
+            String uid = data.get("uid");
+            if (!TextUtils.isEmpty(uid)) {
+                // uid不为空，获取用户信息
+                UMShareAPI mShareAPI = UMShareAPI.get(SettingsActivity.this);
+                mShareAPI.getPlatformInfo(SettingsActivity.this, platform, umAuthListener2);
+            }
+        }
+
+        @Override
+        public void onError(SHARE_MEDIA platform, int action, Throwable t) {
+            Toast.makeText( getApplicationContext(), "Authorize fail", Toast.LENGTH_SHORT).show();
+        }
+
+        @Override
+        public void onCancel(SHARE_MEDIA platform, int action) {
+            Toast.makeText( getApplicationContext(), "Authorize cancel", Toast.LENGTH_SHORT).show();
+        }
+    };
+    private UMAuthListener umAuthListener2 = new UMAuthListener() {
+        @Override
+        public void onComplete(SHARE_MEDIA platform, int action, Map<String, String> data) {
+            String username=data.get("screen_name");
+            String openid=data.get("openid");
+            /*
+            if(platform==SHARE_MEDIA.WEIXIN){
+                PreferenceUtils.setPrefString(getApplicationContext(), "wechatid", openid);
+                PreferenceUtils.setPrefString(getApplicationContext(), "wechatname", username);
+                AVUser.getCurrentUser().put("wechatid", openid);
+                AVUser.getCurrentUser().put("wechatname", username);
+                AVUser.getCurrentUser().saveInBackground();
+            }else*/
+            if(platform==SHARE_MEDIA.QQ){
+                PreferenceUtils.setPrefString(getApplicationContext(), "qqid", openid);
+                PreferenceUtils.setPrefString(getApplicationContext(), "qqname", username);
+                AVUser.getCurrentUser().put("qqid", openid);
+                AVUser.getCurrentUser().put("qqname", username);
+                AVUser.getCurrentUser().saveInBackground();
+            }
+            finish();
+            startActivity(new Intent(SettingsActivity.this,SettingsActivity.class));
+        }
+
+        @Override
+        public void onError(SHARE_MEDIA share_media, int i, Throwable throwable) {
+
+        }
+
+        @Override
+        public void onCancel(SHARE_MEDIA share_media, int i) {
+
+        }
+    };
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java b/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java
index 0b1ebd7..861b4dc 100644
--- a/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java
+++ b/app/src/main/java/com/njzjz/chemicaltools/TitleActivity.java
@@ -75,6 +75,10 @@ protected void onCreate(Bundle savedInstanceState) {
                 @Override
                 public void done(AVObject avObject, AVException e) {
                     // 调用 fetchIfNeededInBackground 和 refreshInBackground 效果是一样的。
+                    String qqid=avObject.getString("qqid");
+                    String qqname=avObject.getString("qqname");
+                    //String wechatid=avObject.getString("wechatid");
+                    //String wechatname=avObject.getString("wechatname");
                     String historyElementOutput=avObject.getString("historyElementOutput");
                     String historyElementOutputHtml=avObject.getString("historyElementOutputHtml");
                     String historyElementNumber=avObject.getString("historyElementNumber");
@@ -95,6 +99,10 @@ public void done(AVObject avObject, AVException e) {
                     if(setting_examOptionMode==null)setting_examOptionMode=false;
                     String pKw=avObject.getString("pKw");
                     if(pKw==null)pKw="14";
+                    PreferenceUtils.setPrefString(getApplicationContext(),"qqid",qqid);
+                    PreferenceUtils.setPrefString(getApplicationContext(),"qqname",qqname);
+                    //PreferenceUtils.setPrefString(getApplicationContext(),"wechatid",wechatid);
+                    //PreferenceUtils.setPrefString(getApplicationContext(),"wechatname",wechatname);
                     PreferenceUtils.setPrefString(getApplicationContext(),"historyElementOutput",historyElementOutput);
                     PreferenceUtils.setPrefString(getApplicationContext(),"historyElementOutputHtml",historyElementOutputHtml);
                     PreferenceUtils.setPrefString(getApplicationContext(),"historyElementNumber",historyElementNumber);
diff --git a/app/src/main/res/layout/activity_rank.xml b/app/src/main/res/layout/activity_rank.xml
new file mode 100644
index 0000000..9244b13
--- /dev/null
+++ b/app/src/main/res/layout/activity_rank.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/activity_rank"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.njzjz.chemicaltools.RankActivity">
+    <ListView
+        android:id="@+id/rank_list"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:clipToPadding="false"
+        android:divider="@android:color/transparent"
+        android:dividerHeight="10dp"
+        android:padding="10dp"
+        android:scrollbarStyle="outsideOverlay"/>
+       <!-- tools:listitem="@layout/ranklist"-->
+</RelativeLayout>
diff --git a/app/src/main/res/layout/fragment_card_layout.xml b/app/src/main/res/layout/fragment_card_layout.xml
index e9c9c24..437113e 100644
--- a/app/src/main/res/layout/fragment_card_layout.xml
+++ b/app/src/main/res/layout/fragment_card_layout.xml
@@ -14,5 +14,4 @@
         android:padding="10dp"
         android:scrollbarStyle="outsideOverlay"
         tools:listitem="@layout/list_item_card" />
-
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/ranklist.xml b/app/src/main/res/layout/ranklist.xml
new file mode 100644
index 0000000..8abd873
--- /dev/null
+++ b/app/src/main/res/layout/ranklist.xml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/selectable_background"
+    android:orientation="vertical"
+    android:foreground="?attr/selectableItemBackground">
+    <LinearLayout
+        style="?android:attr/buttonBarStyle"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" >
+
+        <TextView
+            android:id="@+id/list_item_card_number"
+            style="@style/ListItemText"
+            android:layout_width="41dp"
+            android:layout_height="wrap_content"
+            android:layout_gravity="start|center_horizontal"
+            android:gravity="start|center_vertical" />
+        <TextView
+            android:id="@+id/list_item_card_text1"
+            style="@style/ListItemText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="start|center_horizontal"
+            android:gravity="start|center_vertical"
+            android:layout_weight="1" />
+
+        <TextView
+            android:id="@+id/list_item_card_text2"
+            style="@style/ListItemText"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="end|center_horizontal"
+            android:gravity="end|center_vertical"
+            android:layout_weight="1"
+            />
+    </LinearLayout>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values-en/strings.xml b/app/src/main/res/values-en/strings.xml
index 0f6980a..abb4ebd 100644
--- a/app/src/main/res/values-en/strings.xml
+++ b/app/src/main/res/values-en/strings.xml
@@ -82,4 +82,7 @@
     <string name="prompt_email">Email</string>
     <string name="prompt_password">Password (optional)</string>
     <string name="action_sign_out">Sign Out</string>
+    <string name="setting_QQ">Sign in QQ account</string>
+    <string name="setting_wechat">Sign in Wechat account</string>
+    <string name="button_rank">排行榜</string>
 </resources>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index b601297..2a2c809 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -83,4 +83,7 @@
     <string name="prompt_email">邮箱</string>
     <string name="prompt_password">密码</string>
     <string name="action_sign_out">注销</string>
+    <string name="setting_QQ">授权QQ账号</string>
+    <string name="setting_wechat">授权微信账号</string>
+    <string name="button_rank">排行榜</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index d2e6333..57b2379 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -65,6 +65,8 @@
     <string name="setting_examOptionModeOff">You need to answer questions by yourself.</string>
     <string name="setting_update">Update this app</string>
     <string name="setting_website">Visit the website</string>
+    <string name="setting_QQ">Sign in QQ account</string>
+    <string name="setting_wechat">Sign in Wechat account</string>
     <!--  测试模式  -->
     <string name="setting_mode">Exam Mode</string>
     <string name="setting_mode_0">Answer symbols for elements according to Chinese names</string>
@@ -96,4 +98,5 @@
     <string name="permission_rationale">"Contacts permissions are needed for providing email
         completions."
     </string>
+    <string name="button_rank">排行榜</string>
 </resources>
diff --git a/app/src/main/res/xml/settings_general.xml b/app/src/main/res/xml/settings_general.xml
index 5dc65b4..d30a1e0 100644
--- a/app/src/main/res/xml/settings_general.xml
+++ b/app/src/main/res/xml/settings_general.xml
@@ -1,7 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    <PreferenceCategory android:title="@string/button_user">
+    <PreferenceCategory android:title="@string/button_user" android:key="user">
         <PreferenceScreen android:title="@string/button_login" android:key="login"/>
+        <PreferenceScreen android:title="@string/setting_QQ" android:key="qq" />
+        <!--
+        <PreferenceScreen android:title="@string/setting_wechat" android:key="wechat" />
+        -->
     </PreferenceCategory>
     <PreferenceCategory android:title="@string/button_exam">
         <ListPreference android:title="@string/setting_mode"