diff --git a/src/.idea/workspace.xml b/src/.idea/workspace.xml
index a3d7115..2cc1e46 100644
--- a/src/.idea/workspace.xml
+++ b/src/.idea/workspace.xml
@@ -8,7 +8,9 @@
     </shared>
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="c8515555-ebbc-49d5-889b-0c59bd6c3b6d" name="默认更改列表" comment="" />
+    <list default="true" id="c8515555-ebbc-49d5-889b-0c59bd6c3b6d" name="默认更改列表" comment="">
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+    </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -50,7 +52,7 @@
           </provider>
         </entry>
       </file>
-      <file pinned="false" current-in-tab="true">
+      <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/ui/AlarmAlertActivity.java">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="340">
@@ -66,10 +68,74 @@
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/widget/NoteWidgetProvider_4x.java">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/tool/BackupUtils.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="-3507">
+              <caret line="38" column="13" selection-start-line="38" selection-start-column="13" selection-end-line="38" selection-end-column="13" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/model/Note.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="320">
+              <caret line="287" column="30" lean-forward="true" selection-start-line="287" selection-start-column="30" selection-end-line="287" selection-end-column="30" />
+              <folding>
+                <element signature="e#3356#3357#0" expanded="true" />
+                <element signature="e#3399#3400#0" expanded="true" />
+                <element signature="e#3434#3435#0" expanded="true" />
+                <element signature="e#3478#3479#0" expanded="true" />
+              </folding>
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/gtask/data/MetaData.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="-664">
+              <caret line="27" column="13" selection-start-line="27" selection-start-column="13" selection-end-line="27" selection-end-column="13" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/gtask/data/Node.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="-944">
+              <caret line="22" column="22" selection-start-line="22" selection-start-column="22" selection-end-line="22" selection-end-column="22" />
+              <folding>
+                <element signature="e#1923#1924#0" expanded="true" />
+                <element signature="e#1954#1955#0" expanded="true" />
+              </folding>
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/gtask/data/SqlData.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="-500">
+              <caret line="37" column="13" selection-start-line="37" selection-start-column="13" selection-end-line="37" selection-end-column="13" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/gtask/data/SqlNote.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="574">
+              <caret line="172" column="34" lean-forward="true" selection-start-line="172" selection-start-column="34" selection-end-line="172" selection-end-column="34" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/tool/DataUtils.java">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="140">
-              <caret line="26" column="13" selection-start-line="26" selection-start-column="13" selection-end-line="26" selection-end-column="13" />
+              <caret line="37" column="13" selection-start-line="37" selection-start-column="13" selection-end-line="37" selection-end-column="13" />
             </state>
           </provider>
         </entry>
@@ -377,6 +443,17 @@
               <item name="notes" type="462c0819:PsiDirectoryNode" />
               <item name="gtask" type="462c0819:PsiDirectoryNode" />
             </path>
+            <path>
+              <item name="src" type="b2602c69:ProjectViewProjectNode" />
+              <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="app" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="notes" type="462c0819:PsiDirectoryNode" />
+              <item name="gtask" type="462c0819:PsiDirectoryNode" />
+              <item name="data" type="462c0819:PsiDirectoryNode" />
+            </path>
             <path>
               <item name="src" type="b2602c69:ProjectViewProjectNode" />
               <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
@@ -388,6 +465,17 @@
               <item name="gtask" type="462c0819:PsiDirectoryNode" />
               <item name="exception" type="462c0819:PsiDirectoryNode" />
             </path>
+            <path>
+              <item name="src" type="b2602c69:ProjectViewProjectNode" />
+              <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="app" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="notes" type="462c0819:PsiDirectoryNode" />
+              <item name="gtask" type="462c0819:PsiDirectoryNode" />
+              <item name="remote" type="462c0819:PsiDirectoryNode" />
+            </path>
             <path>
               <item name="src" type="b2602c69:ProjectViewProjectNode" />
               <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
@@ -481,6 +569,51 @@
               <item name="res" type="462c0819:PsiDirectoryNode" />
               <item name="values-zh-rCN" type="462c0819:PsiDirectoryNode" />
             </path>
+            <path>
+              <item name="src" type="b2602c69:ProjectViewProjectNode" />
+              <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="src" type="b2602c69:ProjectViewProjectNode" />
+              <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="net" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="src" type="b2602c69:ProjectViewProjectNode" />
+              <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="net" type="462c0819:PsiDirectoryNode" />
+              <item name="micode" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="src" type="b2602c69:ProjectViewProjectNode" />
+              <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="net" type="462c0819:PsiDirectoryNode" />
+              <item name="micode" type="462c0819:PsiDirectoryNode" />
+              <item name="notes" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="src" type="b2602c69:ProjectViewProjectNode" />
+              <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="net" type="462c0819:PsiDirectoryNode" />
+              <item name="micode" type="462c0819:PsiDirectoryNode" />
+              <item name="notes" type="462c0819:PsiDirectoryNode" />
+              <item name="gtask" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="src" type="b2602c69:ProjectViewProjectNode" />
+              <item name="src" type="8a07ba80:GradleTreeStructureProvider$GradleModuleDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="net" type="462c0819:PsiDirectoryNode" />
+              <item name="micode" type="462c0819:PsiDirectoryNode" />
+              <item name="notes" type="462c0819:PsiDirectoryNode" />
+              <item name="gtask" type="462c0819:PsiDirectoryNode" />
+              <item name="data" type="462c0819:PsiDirectoryNode" />
+            </path>
           </expand>
           <select />
         </subPane>
@@ -810,7 +943,14 @@
       <option name="project" value="LOCAL" />
       <updated>1570807703651</updated>
     </task>
-    <option name="localTasksCounter" value="32" />
+    <task id="LOCAL-00032" summary="Merge remote-tracking branch 'origin/ziji_wu' into develop&#10;&#10;# Conflicts:&#10;#&#9;src/.gradle/5.4.1/executionHistory/executionHistory.bin&#10;#&#9;src/.gradle/5.4.1/executionHistory/executionHistory.lock&#10;#&#9;src/.gradle/5.4.1/fileHashes/fileHashes.bin&#10;#&#9;src/.gradle/5.4.1/fileHashes/fileHashes.lock&#10;#&#9;src/.gradle/5.4.1/fileHashes/resourceHashesCache.bin&#10;#&#9;src/.gradle/5.4.1/javaCompile/javaCompile.lock&#10;#&#9;src/.gradle/buildOutputCleanup/buildOutputCleanup.lock&#10;#&#9;src/.gradle/buildOutputCleanup/outputFiles.bin&#10;#&#9;src/.idea/caches/build_file_checksums.ser&#10;#&#9;src/.idea/caches/gradle_models.ser&#10;#&#9;src/.idea/sonarlint/issuestore/1/e/1eb2363b523dbcae43d3c6e4790c64436af61b13&#10;#&#9;src/.idea/sonarlint/issuestore/3/e/3e688be40dc69cfd1062f41d0fc27fe261a26710&#10;#&#9;src/.idea/sonarlint/issuestore/5/7/577f30d26378ec8a2bd2e4a43f3c79b3f04c402c&#10;#&#9;src/.idea/sonarlint/issuestore/6/a/6a65e747031f27aef20597b4181148a9fbf963d5&#10;#&#9;src/.idea/sonarlint/issuestore/a/7/a7641cfac724321d508c2a284223a711011a93f5&#10;#&#9;src/.idea/sonarlint/issuestore/a/d/ad72331a1bed265bb9c0fe838faa74dbf69fce32&#10;#&#9;src/.idea/sonarlint/issuestore/d/d/dd970bd8ce083850fca1d4d159647ccd110e57cb&#10;#&#9;src/.idea/workspace.xml&#10;#&#9;src/app/app.iml&#10;#&#9;src/app/build.gradle&#10;#&#9;src/app/build/intermediates/dex/debug/mergeDexDebug/out/classes.dex&#10;#&#9;src/app/build/intermediates/incremental/packageDebug/tmp/debug/dex-renamer-state.txt&#10;#&#9;src/app/build/intermediates/incremental/packageDebug/tmp/debug/zip-cache/dPcwR9oS2EmiImbvDZ1Qg_iwk3M=&#10;#&#9;src/app/build/intermediates/javac/debug/classes/net/micode/notes/data/NotesDatabaseHelper.class&#10;#&#9;src/app/build/intermediates/javac/debug/classes/net/micode/notes/data/NotesProvider.class&#10;#&#9;src/app/build/intermediates/processed_res/debug/processDebugResources/out/resources-debug.ap_&#10;#&#9;src/app/build/intermediates/transforms/dexBuilder/debug/0/net/micode/notes/data/NotesDatabaseHelper.dex&#10;#&#9;src/app/build/intermediates/transforms/dexBuilder/debug/0/net/micode/notes/data/NotesProvider.dex&#10;#&#9;src/app/build/outputs/apk/debug/app-debug.apk&#10;#&#9;src/app/src/main/java/net/micode/notes/data/NotesProvider.java">
+      <created>1570809551671</created>
+      <option name="number" value="00032" />
+      <option name="presentableId" value="LOCAL-00032" />
+      <option name="project" value="LOCAL" />
+      <updated>1570809551671</updated>
+    </task>
+    <option name="localTasksCounter" value="33" />
     <servers />
   </component>
   <component name="TodoView">
@@ -827,7 +967,7 @@
     <editor active="true" />
     <layout>
       <window_info id="Captures" order="0" sideWeight="0.5019305" side_tool="true" weight="0.16957104" />
-      <window_info content_ui="combo" id="Project" order="1" sideWeight="0.48771265" visible="true" weight="0.15281501" />
+      <window_info active="true" content_ui="combo" id="Project" order="1" sideWeight="0.48771265" visible="true" weight="0.15281501" />
       <window_info id="设计器" order="2" />
       <window_info id="Resources Explorer" order="3" weight="0.3297587" />
       <window_info id="Structure" order="4" sideWeight="0.51132077" side_tool="true" weight="0.15281501" />
@@ -844,8 +984,8 @@
       <window_info anchor="bottom" id="Debug" order="6" />
       <window_info anchor="bottom" id="Terminal" order="7" weight="0.3297587" />
       <window_info anchor="bottom" id="Event Log" order="8" side_tool="true" weight="0.3294271" />
-      <window_info anchor="bottom" id="Version Control" order="9" weight="0.3297587" />
-      <window_info active="true" anchor="bottom" id="Build" order="10" visible="true" weight="0.29088473" />
+      <window_info anchor="bottom" id="Version Control" order="9" visible="true" weight="0.3297587" />
+      <window_info anchor="bottom" id="Build" order="10" weight="0.29088473" />
       <window_info anchor="bottom" id="Messages" order="11" weight="0.3297587" />
       <window_info anchor="right" id="Gradle" order="0" weight="0.3297587" />
       <window_info anchor="right" id="Device File Explorer" order="1" side_tool="true" weight="0.3297587" />
@@ -899,44 +1039,6 @@
     <option name="LAST_COMMIT_MESSAGE" value="Merge remote-tracking branch 'origin/ziji_wu' into develop&#10;&#10;# Conflicts:&#10;#&#9;src/.gradle/5.4.1/executionHistory/executionHistory.bin&#10;#&#9;src/.gradle/5.4.1/executionHistory/executionHistory.lock&#10;#&#9;src/.gradle/5.4.1/fileHashes/fileHashes.bin&#10;#&#9;src/.gradle/5.4.1/fileHashes/fileHashes.lock&#10;#&#9;src/.gradle/5.4.1/fileHashes/resourceHashesCache.bin&#10;#&#9;src/.gradle/5.4.1/javaCompile/javaCompile.lock&#10;#&#9;src/.gradle/buildOutputCleanup/buildOutputCleanup.lock&#10;#&#9;src/.gradle/buildOutputCleanup/outputFiles.bin&#10;#&#9;src/.idea/caches/build_file_checksums.ser&#10;#&#9;src/.idea/caches/gradle_models.ser&#10;#&#9;src/.idea/sonarlint/issuestore/1/e/1eb2363b523dbcae43d3c6e4790c64436af61b13&#10;#&#9;src/.idea/sonarlint/issuestore/3/e/3e688be40dc69cfd1062f41d0fc27fe261a26710&#10;#&#9;src/.idea/sonarlint/issuestore/5/7/577f30d26378ec8a2bd2e4a43f3c79b3f04c402c&#10;#&#9;src/.idea/sonarlint/issuestore/6/a/6a65e747031f27aef20597b4181148a9fbf963d5&#10;#&#9;src/.idea/sonarlint/issuestore/a/7/a7641cfac724321d508c2a284223a711011a93f5&#10;#&#9;src/.idea/sonarlint/issuestore/a/d/ad72331a1bed265bb9c0fe838faa74dbf69fce32&#10;#&#9;src/.idea/sonarlint/issuestore/d/d/dd970bd8ce083850fca1d4d159647ccd110e57cb&#10;#&#9;src/.idea/workspace.xml&#10;#&#9;src/app/app.iml&#10;#&#9;src/app/build.gradle&#10;#&#9;src/app/build/intermediates/dex/debug/mergeDexDebug/out/classes.dex&#10;#&#9;src/app/build/intermediates/incremental/packageDebug/tmp/debug/dex-renamer-state.txt&#10;#&#9;src/app/build/intermediates/incremental/packageDebug/tmp/debug/zip-cache/dPcwR9oS2EmiImbvDZ1Qg_iwk3M=&#10;#&#9;src/app/build/intermediates/javac/debug/classes/net/micode/notes/data/NotesDatabaseHelper.class&#10;#&#9;src/app/build/intermediates/javac/debug/classes/net/micode/notes/data/NotesProvider.class&#10;#&#9;src/app/build/intermediates/processed_res/debug/processDebugResources/out/resources-debug.ap_&#10;#&#9;src/app/build/intermediates/transforms/dexBuilder/debug/0/net/micode/notes/data/NotesDatabaseHelper.dex&#10;#&#9;src/app/build/intermediates/transforms/dexBuilder/debug/0/net/micode/notes/data/NotesProvider.dex&#10;#&#9;src/app/build/outputs/apk/debug/app-debug.apk&#10;#&#9;src/app/src/main/java/net/micode/notes/data/NotesProvider.java" />
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://D:/Android_SDK/SDK/sources/android-28/android/content/Intent.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="239">
-          <caret line="628" column="13" selection-start-line="628" selection-start-column="13" selection-end-line="628" selection-end-column="13" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/AndroidManifest.xml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="449">
-          <caret line="40" column="27" selection-start-line="40" selection-start-column="27" selection-end-line="40" selection-end-column="27" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/build.gradle">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="220">
-          <caret line="11" column="13" selection-start-line="11" selection-start-column="13" selection-end-line="11" selection-end-column="13" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/settings.gradle">
-      <provider selected="true" editor-type-id="text-editor" />
-    </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/raw-zh-rCN/introduction">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="140">
-          <caret line="7" column="38" selection-start-line="7" selection-start-column="38" selection-end-line="7" selection-end-column="38" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/res/raw/introduction">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="20">
-          <caret line="1" column="47" selection-start-line="1" selection-start-column="47" selection-end-line="1" selection-end-column="47" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://D:/Android_SDK/SDK/sources/android-28/android/widget/Button.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="631">
@@ -978,13 +1080,6 @@
       </provider>
       <provider editor-type-id="android-manifest" />
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/gtask/data/MetaData.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="140">
-          <caret line="27" column="13" selection-start-line="27" selection-start-column="13" selection-end-line="27" selection-end-column="13" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/app/src/main/res/values/styles.xml">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="1200">
@@ -1201,13 +1296,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/model/Note.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="457">
-          <caret line="218" column="15" lean-forward="true" selection-start-line="218" selection-start-column="15" selection-end-line="218" selection-end-column="15" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/tool/ResourceParser.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="166">
@@ -1261,6 +1349,74 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/tool/BackupUtils.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="-3507">
+          <caret line="38" column="13" selection-start-line="38" selection-start-column="13" selection-end-line="38" selection-end-column="13" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/gtask/data/MetaData.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="-664">
+          <caret line="27" column="13" selection-start-line="27" selection-start-column="13" selection-end-line="27" selection-end-column="13" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/app/src/main/java/net/micode/notes/gtask/data/Node.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="-944">
+          <caret line="22" column="22" selection-start-line="22" selection-start-column="22" selection-end-line="22" selection-end-column="22" />
+          <folding>
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