diff --git a/build.gradle b/build.gradle
index f3519b5..2b9a4f0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.3.0'
+        classpath 'com.android.tools.build:gradle:7.4.2'
     }
 }
 plugins {
diff --git a/src/build.gradle b/src/build.gradle
index fd8cfd2..0456445 100644
--- a/src/build.gradle
+++ b/src/build.gradle
@@ -3,12 +3,13 @@ apply {
 }
 
 android {
-    compileSdkVersion 14
-    buildToolsVersion "33.0.0"
+    compileSdkVersion 25
+//    buildToolsVersion "14.0.0"
 
     defaultConfig {
         applicationId "net.micode.notes"
-        targetSdkVersion 14
+        minSdkVersion 25
+        targetSdkVersion 25
     }
 
     buildTypes {
@@ -18,3 +19,11 @@ android {
         }
     }
 }
+repositories {
+    jcenter()
+    google()
+    mavenCentral()
+}
+dependencies {
+    implementation 'com.zzhoujay.richtext:richtext:3.0.7'
+}
\ No newline at end of file
diff --git a/src/src/main/AndroidManifest.xml b/src/src/main/AndroidManifest.xml
index 75d76cf..fdb032f 100644
--- a/src/src/main/AndroidManifest.xml
+++ b/src/src/main/AndroidManifest.xml
@@ -17,11 +17,9 @@
 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="net.micode.notes"
-    android:versionCode="1"
-    android:versionName="0.1" >
+    android:versionCode="14"
+    android:versionName="1.4" >
 
-    <!-- 运行该应用所需SDK版本声明 -->
-    <uses-sdk android:minSdkVersion="14" />
     <!-- APP所需权限申请 -->
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />
@@ -45,19 +43,24 @@
             android:launchMode="singleTop"
             android:theme="@style/NoteTheme"
             android:uiOptions="splitActionBarWhenNarrow"
-            android:windowSoftInputMode="adjustPan" >
+            android:windowSoftInputMode="adjustPan"
+            android:exported="true">
 
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity android:name=".ui.activities.PreviewActivity">
+
+        </activity>
 
         <activity
             android:name=".ui.activities.NoteEditActivity"
             android:configChanges="keyboardHidden|orientation|screenSize"
             android:launchMode="singleTop"
-            android:theme="@style/NoteTheme" >
+            android:theme="@style/NoteTheme"
+            android:exported="true">
 
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
@@ -91,7 +94,8 @@
         <!-- 内容访问者程序声明 -->
         <receiver
             android:name=".widget.NoteWidgetProvider_2x"
-            android:label="@string/app_widget2x2" >
+            android:label="@string/app_widget2x2"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
                 <action android:name="android.appwidget.action.APPWIDGET_DELETED" />
@@ -104,7 +108,8 @@
         </receiver>
         <receiver
             android:name=".widget.NoteWidgetProvider_4x"
-            android:label="@string/app_widget4x4" >
+            android:label="@string/app_widget4x4"
+            android:exported="true">
 
             <intent-filter>
                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
@@ -117,7 +122,8 @@
                 android:resource="@xml/widget_4x_info" />
         </receiver>
 
-        <receiver android:name=".ui.AlarmInitReceiver" >
+        <receiver android:name=".ui.AlarmInitReceiver"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED" />
             </intent-filter>