diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..1e2d8f1
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,11 @@
+# Default ignored files
+/shelf/
+/inspectionProfiles
+/libraries
+/modules
+androidTestResultsUserPreferences.xml
+encodings.xml
+jarRepositories.xml
+workspace.xml
+assetWizardSettings.xml
+deploymentTargetDropDown.xml
\ No newline at end of file
diff --git a/.idea/compiler.xml b/.idea/compiler.xml
new file mode 100644
index 0000000..61a9130
--- /dev/null
+++ b/.idea/compiler.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <bytecodeTargetLevel target="1.8" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index ec2010d..66b5f52 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="testRunner" value="PLATFORM" />
+        <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
         <option name="modules">
@@ -13,7 +14,6 @@
             <option value="$PROJECT_DIR$/library" />
           </set>
         </option>
-        <option name="resolveModulePerSourceSet" value="false" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/jarRepositories.xml b/.idea/jarRepositories.xml
deleted file mode 100644
index 376307e..0000000
--- a/.idea/jarRepositories.xml
+++ /dev/null
@@ -1,45 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RemoteRepositoriesConfiguration">
-    <remote-repository>
-      <option name="id" value="central" />
-      <option name="name" value="Maven Central repository" />
-      <option name="url" value="https://repo1.maven.org/maven2" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="jboss.community" />
-      <option name="name" value="JBoss Community repository" />
-      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="BintrayJCenter" />
-      <option name="name" value="BintrayJCenter" />
-      <option name="url" value="https://jcenter.bintray.com/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="MavenLocal" />
-      <option name="name" value="MavenLocal" />
-      <option name="url" value="file:$MAVEN_REPOSITORY$/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="Google" />
-      <option name="name" value="Google" />
-      <option name="url" value="https://dl.google.com/dl/android/maven2/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="$PROJECT_DIR$/../../env/android-sdk-macosx/extras/android/m2repository" />
-      <option name="name" value="$PROJECT_DIR$/../../env/android-sdk-macosx/extras/android/m2repository" />
-      <option name="url" value="file:$PROJECT_DIR$/../../env/android-sdk-macosx/extras/android/m2repository/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="$PROJECT_DIR$/../../env/android-sdk-macosx/extras/m2repository" />
-      <option name="name" value="$PROJECT_DIR$/../../env/android-sdk-macosx/extras/m2repository" />
-      <option name="url" value="file:$PROJECT_DIR$/../../env/android-sdk-macosx/extras/m2repository/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="$PROJECT_DIR$/../../env/android-sdk-macosx/extras/google/m2repository" />
-      <option name="name" value="$PROJECT_DIR$/../../env/android-sdk-macosx/extras/google/m2repository" />
-      <option name="url" value="file:$PROJECT_DIR$/../../env/android-sdk-macosx/extras/google/m2repository/" />
-    </remote-repository>
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 0d45e8d..58918f5 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK" />
 </project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
index cf1b6b5..a75ac0c 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -2,11 +2,15 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
-      <module fileurl="file://$PROJECT_DIR$/FreeReflection.iml" filepath="$PROJECT_DIR$/FreeReflection.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/FreeReflection.iml" filepath="$PROJECT_DIR$/.idea/modules/FreeReflection.iml" />
       <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/FreeReflection.app.iml" filepath="$PROJECT_DIR$/.idea/modules/app/FreeReflection.app.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/FreeReflection.app.androidTest.iml" filepath="$PROJECT_DIR$/.idea/modules/app/FreeReflection.app.androidTest.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/FreeReflection.app.main.iml" filepath="$PROJECT_DIR$/.idea/modules/app/FreeReflection.app.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/FreeReflection.app.unitTest.iml" filepath="$PROJECT_DIR$/.idea/modules/app/FreeReflection.app.unitTest.iml" />
       <module fileurl="file://$PROJECT_DIR$/.idea/modules/library/FreeReflection.library.iml" filepath="$PROJECT_DIR$/.idea/modules/library/FreeReflection.library.iml" />
-      <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
-      <module fileurl="file://$PROJECT_DIR$/library/library.iml" filepath="$PROJECT_DIR$/library/library.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/library/FreeReflection.library.androidTest.iml" filepath="$PROJECT_DIR$/.idea/modules/library/FreeReflection.library.androidTest.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/library/FreeReflection.library.main.iml" filepath="$PROJECT_DIR$/.idea/modules/library/FreeReflection.library.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/library/FreeReflection.library.unitTest.iml" filepath="$PROJECT_DIR$/.idea/modules/library/FreeReflection.library.unitTest.iml" />
     </modules>
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/runConfigurations.xml b/.idea/runConfigurations.xml
deleted file mode 100644
index 7f68460..0000000
--- a/.idea/runConfigurations.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 1f4d086..fec67c3 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,11 +1,11 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion 33
     defaultConfig {
         applicationId "me.weishu.freereflection.app"
         minSdkVersion 21
-        targetSdkVersion 30
+        targetSdkVersion 'UpsideDownCake'
         versionCode 1
         versionName "1.0"
 
@@ -25,6 +25,6 @@ android {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation project(":library")
-    implementation 'com.android.support:appcompat-v7:28.0.0'
-    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 }
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 0f4927e..56b01e3 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -9,7 +9,9 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
diff --git a/gradle.properties b/gradle.properties
index aac7c9b..c5a1121 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -15,3 +15,5 @@ org.gradle.jvmargs=-Xmx1536m
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
+#android.enableJetifier=true
+android.useAndroidX=true
diff --git a/gradlew b/gradlew
old mode 100755
new mode 100644
diff --git a/library/build.gradle b/library/build.gradle
index fdbb7ba..74328bd 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -8,7 +8,7 @@ android {
         versionCode 1
         versionName "1.0"
 
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
 
         externalNativeBuild {
             cmake {
@@ -16,8 +16,12 @@ android {
                 arguments '-DANDROID_STL=c++_static'
             }
         }
+        // provider proguard-rules
+        consumerProguardFile 'proguard-rules.pro'
     }
 
+    packageBuildConfig = false
+
     buildTypes {
         release {
             minifyEnabled false
diff --git a/library/proguard-rules.pro b/library/proguard-rules.pro
index f1b4245..efb0c69 100644
--- a/library/proguard-rules.pro
+++ b/library/proguard-rules.pro
@@ -19,3 +19,5 @@
 # If you keep the line number information, uncomment this to
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
+
+-keep class me.weishu.reflection.BootstrapClass { *; }
\ No newline at end of file
diff --git a/library/src/main/java/me/weishu/reflection/Reflection.java b/library/src/main/java/me/weishu/reflection/Reflection.java
index 9161812..f2b3305 100644
--- a/library/src/main/java/me/weishu/reflection/Reflection.java
+++ b/library/src/main/java/me/weishu/reflection/Reflection.java
@@ -55,6 +55,15 @@ private static boolean unsealByDexFile(Context context) {
                 fos.write(bytes);
             }
 
+            // Support target Android U.
+            // https://developer.android.com/about/versions/14/behavior-changes-14#safer-dynamic-code-loading
+            try {
+                //noinspection ResultOfMethodCallIgnored
+                code.setReadOnly();
+            } catch (Throwable ignore) {
+            }
+
+            @SuppressWarnings("deprecation")
             DexFile dexFile = new DexFile(code);
             // This class is hardcoded in the dex, Don't use BootstrapClass.class to reference it
             // it maybe obfuscated!!
diff --git a/library/src/main/res/values/strings.xml b/library/src/main/res/values/strings.xml
deleted file mode 100644
index e78d2f7..0000000
--- a/library/src/main/res/values/strings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<resources>
-    <string name="app_name">Lib</string>
-</resources>