diff --git a/README.md b/README.md
index 8d5cccc..b14fc16 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ you can scan the qrcode for download demo apk
 In your build.gradle:
 ```
 dependencies {
-       implementation 'com.ethanhua:skeleton:1.1.2'
+       implementation 'com.ethanhua:skeleton:2.0.0'
        implementation 'io.supercharge:shimmerlayout:2.1.0'
     }
 ```
diff --git a/build.gradle b/build.gradle
index 7233b3b..a09ab09 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.4.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle.properties b/gradle.properties
index aac7c9b..53328d0 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -15,3 +15,7 @@ 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
+
+#androidx
+android.useAndroidX=true
+android.enableJetifier=true
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index d1bd79e..5337740 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-all.zip
diff --git a/library/build.gradle b/library/build.gradle
index ac5057d..147f84f 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 apply plugin: 'com.novoda.bintray-release'
 android {
-    compileSdkVersion 26
+    compileSdkVersion 28
     defaultConfig {
-        minSdkVersion 15
-        targetSdkVersion 26
-        versionCode 10
-        versionName "1.1.2"
+        minSdkVersion 23
+        targetSdkVersion 28
+        versionCode 11
+        versionName "2.0.0"
     }
     buildTypes {
         release {
@@ -19,15 +19,16 @@ android {
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation 'io.supercharge:shimmerlayout:2.1.0'
-    implementation 'com.android.support:recyclerview-v7:26.1.0'
-    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'androidx.recyclerview:recyclerview:1.0.0'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
+    testImplementation 'junit:junit:4.12'
 }
 
 publish {
     userOrg = 'ethanhua'
     groupId = 'com.ethanhua'
     artifactId = 'skeleton'
-    publishVersion = '1.1.2'
+    publishVersion = '2.0.0'
     bintrayUser = 'ethanhua'
     bintrayKey = ''
     desc = 'a library provider a easy way to show skeleton loading view'
diff --git a/library/src/main/java/com/ethanhua/skeleton/RecyclerViewSkeletonScreen.java b/library/src/main/java/com/ethanhua/skeleton/RecyclerViewSkeletonScreen.java
index 39b3609..5d37e84 100644
--- a/library/src/main/java/com/ethanhua/skeleton/RecyclerViewSkeletonScreen.java
+++ b/library/src/main/java/com/ethanhua/skeleton/RecyclerViewSkeletonScreen.java
@@ -1,11 +1,11 @@
 package com.ethanhua.skeleton;
 
-import android.support.annotation.ArrayRes;
-import android.support.annotation.ColorRes;
-import android.support.annotation.IntRange;
-import android.support.annotation.LayoutRes;
-import android.support.v4.content.ContextCompat;
-import android.support.v7.widget.RecyclerView;
+import androidx.annotation.ArrayRes;
+import androidx.annotation.ColorRes;
+import androidx.annotation.IntRange;
+import androidx.annotation.LayoutRes;
+import androidx.core.content.ContextCompat;
+import androidx.recyclerview.widget.RecyclerView;
 
 /**
  * Created by ethanhua on 2017/7/29.
diff --git a/library/src/main/java/com/ethanhua/skeleton/ShimmerViewHolder.java b/library/src/main/java/com/ethanhua/skeleton/ShimmerViewHolder.java
index 33c28ca..34f8390 100644
--- a/library/src/main/java/com/ethanhua/skeleton/ShimmerViewHolder.java
+++ b/library/src/main/java/com/ethanhua/skeleton/ShimmerViewHolder.java
@@ -1,10 +1,11 @@
 package com.ethanhua.skeleton;
 
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 
+import androidx.recyclerview.widget.RecyclerView;
+
 /**
  * Created by ethanhua on 2017/7/29.
  */
diff --git a/library/src/main/java/com/ethanhua/skeleton/Skeleton.java b/library/src/main/java/com/ethanhua/skeleton/Skeleton.java
index 714f641..37f5323 100644
--- a/library/src/main/java/com/ethanhua/skeleton/Skeleton.java
+++ b/library/src/main/java/com/ethanhua/skeleton/Skeleton.java
@@ -1,8 +1,9 @@
 package com.ethanhua.skeleton;
 
-import android.support.v7.widget.RecyclerView;
 import android.view.View;
 
+import androidx.recyclerview.widget.RecyclerView;
+
 /**
  * Created by ethanhua on 2017/7/29.
  */
diff --git a/library/src/main/java/com/ethanhua/skeleton/SkeletonAdapter.java b/library/src/main/java/com/ethanhua/skeleton/SkeletonAdapter.java
index 3f076f9..aa94056 100644
--- a/library/src/main/java/com/ethanhua/skeleton/SkeletonAdapter.java
+++ b/library/src/main/java/com/ethanhua/skeleton/SkeletonAdapter.java
@@ -1,10 +1,11 @@
 package com.ethanhua.skeleton;
 
-import android.support.annotation.IntRange;
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
 
+import androidx.annotation.IntRange;
+import androidx.recyclerview.widget.RecyclerView;
+
 import io.supercharge.shimmerlayout.ShimmerLayout;
 
 /**
diff --git a/library/src/main/java/com/ethanhua/skeleton/ViewSkeletonScreen.java b/library/src/main/java/com/ethanhua/skeleton/ViewSkeletonScreen.java
index 87226ba..71e21f9 100644
--- a/library/src/main/java/com/ethanhua/skeleton/ViewSkeletonScreen.java
+++ b/library/src/main/java/com/ethanhua/skeleton/ViewSkeletonScreen.java
@@ -1,9 +1,9 @@
 package com.ethanhua.skeleton;
 
-import android.support.annotation.ColorRes;
-import android.support.annotation.IntRange;
-import android.support.annotation.LayoutRes;
-import android.support.v4.content.ContextCompat;
+import androidx.annotation.ColorRes;
+import androidx.annotation.IntRange;
+import androidx.annotation.LayoutRes;
+import androidx.core.content.ContextCompat;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
diff --git a/library/src/test/java/com/ethanhua/skeleton/ExampleUnitTest.java b/library/src/test/java/com/ethanhua/skeleton/ExampleUnitTest.java
index df90d02..562912a 100644
--- a/library/src/test/java/com/ethanhua/skeleton/ExampleUnitTest.java
+++ b/library/src/test/java/com/ethanhua/skeleton/ExampleUnitTest.java
@@ -1,9 +1,6 @@
 package com.ethanhua.skeleton;
 
-
-
-import static junit.framework.Assert.assertEquals;
-
+import static org.junit.Assert.assertEquals;
 
 /**
  * Example local unit test, which will execute on the development machine (host).
@@ -12,6 +9,6 @@
  */
 public class ExampleUnitTest {
     public void addition_isCorrect() throws Exception {
-        assertEquals(4, 2 + 2);
+        assertEquals(4, 2 + 2, 0);
     }
 }
\ No newline at end of file
diff --git a/sample/build.gradle b/sample/build.gradle
index 381f0b5..e8f1d08 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -1,14 +1,14 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 28
     defaultConfig {
         applicationId "com.ethanhua.skeleton.sample"
-        minSdkVersion 15
-        targetSdkVersion 26
-        versionCode 6
-        versionName "1.0.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        minSdkVersion 23
+        targetSdkVersion 28
+        versionCode 7
+        versionName "2.0.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
         release {
@@ -20,14 +20,14 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
+    androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
     //implementation project(':library')
-    implementation 'com.ethanhua:skeleton:1.1.2'
+    implementation 'com.ethanhua:skeleton:2.0.0'
     implementation 'io.supercharge:shimmerlayout:2.1.0'
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
-    implementation 'com.android.support:recyclerview-v7:26.1.0'
-    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.recyclerview:recyclerview:1.0.0'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
     testImplementation 'junit:junit:4.12'
 }
diff --git a/sample/src/main/java/com/ethanhua/skeleton/sample/MainActivity.java b/sample/src/main/java/com/ethanhua/skeleton/sample/MainActivity.java
index 2f3c514..4c7f5d4 100644
--- a/sample/src/main/java/com/ethanhua/skeleton/sample/MainActivity.java
+++ b/sample/src/main/java/com/ethanhua/skeleton/sample/MainActivity.java
@@ -2,9 +2,10 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
 import android.view.View;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 public class MainActivity extends AppCompatActivity {
 
     @Override
diff --git a/sample/src/main/java/com/ethanhua/skeleton/sample/RecyclerViewActivity.java b/sample/src/main/java/com/ethanhua/skeleton/sample/RecyclerViewActivity.java
index 3957db6..7193271 100644
--- a/sample/src/main/java/com/ethanhua/skeleton/sample/RecyclerViewActivity.java
+++ b/sample/src/main/java/com/ethanhua/skeleton/sample/RecyclerViewActivity.java
@@ -3,11 +3,12 @@
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.annotation.Nullable;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.GridLayoutManager;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
+
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.GridLayoutManager;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 
 import com.ethanhua.skeleton.Skeleton;
 import com.ethanhua.skeleton.SkeletonScreen;
diff --git a/sample/src/main/java/com/ethanhua/skeleton/sample/StatusViewActivity.java b/sample/src/main/java/com/ethanhua/skeleton/sample/StatusViewActivity.java
index f577326..ac96e06 100644
--- a/sample/src/main/java/com/ethanhua/skeleton/sample/StatusViewActivity.java
+++ b/sample/src/main/java/com/ethanhua/skeleton/sample/StatusViewActivity.java
@@ -1,10 +1,11 @@
 package com.ethanhua.skeleton.sample;
 
 import android.content.Intent;
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.view.View;
 
+import androidx.appcompat.app.AppCompatActivity;
+
 import com.ethanhua.skeleton.ViewReplacer;
 
 public class StatusViewActivity extends AppCompatActivity {
diff --git a/sample/src/main/java/com/ethanhua/skeleton/sample/ViewActivity.java b/sample/src/main/java/com/ethanhua/skeleton/sample/ViewActivity.java
index 07ed28c..4df4b63 100644
--- a/sample/src/main/java/com/ethanhua/skeleton/sample/ViewActivity.java
+++ b/sample/src/main/java/com/ethanhua/skeleton/sample/ViewActivity.java
@@ -4,11 +4,12 @@
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Message;
-import android.support.v7.app.AppCompatActivity;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
 import android.view.View;
 
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.ethanhua.skeleton.Skeleton;
 import com.ethanhua.skeleton.SkeletonScreen;
 import com.ethanhua.skeleton.sample.adapter.TopicAdapter;
diff --git a/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/NewsAdapter.java b/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/NewsAdapter.java
index ec856be..faa3586 100644
--- a/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/NewsAdapter.java
+++ b/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/NewsAdapter.java
@@ -1,9 +1,10 @@
 package com.ethanhua.skeleton.sample.adapter;
 
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
 
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.ethanhua.skeleton.sample.R;
 
 /**
diff --git a/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/PersonAdapter.java b/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/PersonAdapter.java
index 810510d..d4f77c8 100644
--- a/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/PersonAdapter.java
+++ b/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/PersonAdapter.java
@@ -1,9 +1,10 @@
 package com.ethanhua.skeleton.sample.adapter;
 
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
 
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.ethanhua.skeleton.sample.R;
 
 /**
diff --git a/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/SimpleRcvViewHolder.java b/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/SimpleRcvViewHolder.java
index e99c005..a016fc2 100644
--- a/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/SimpleRcvViewHolder.java
+++ b/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/SimpleRcvViewHolder.java
@@ -1,9 +1,10 @@
 package com.ethanhua.skeleton.sample.adapter;
 
-import android.support.v7.widget.RecyclerView;
 import android.util.SparseArray;
 import android.view.View;
 
+import androidx.recyclerview.widget.RecyclerView;
+
 
 public class SimpleRcvViewHolder extends RecyclerView.ViewHolder {
     private final SparseArray<View> views = new SparseArray<>();
diff --git a/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/TopicAdapter.java b/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/TopicAdapter.java
index cc954bd..f33251d 100644
--- a/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/TopicAdapter.java
+++ b/sample/src/main/java/com/ethanhua/skeleton/sample/adapter/TopicAdapter.java
@@ -1,9 +1,10 @@
 package com.ethanhua.skeleton.sample.adapter;
 
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
 
+import androidx.recyclerview.widget.RecyclerView;
+
 import com.ethanhua.skeleton.sample.R;
 
 /**
diff --git a/sample/src/main/res/layout/activity_recyclerview.xml b/sample/src/main/res/layout/activity_recyclerview.xml
index dbaca04..c6d1c84 100644
--- a/sample/src/main/res/layout/activity_recyclerview.xml
+++ b/sample/src/main/res/layout/activity_recyclerview.xml
@@ -7,7 +7,7 @@
     android:background="@android:color/white"
     android:orientation="vertical">
 
-    <android.support.v7.widget.RecyclerView
+    <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"/>
diff --git a/sample/src/main/res/layout/activity_status_view.xml b/sample/src/main/res/layout/activity_status_view.xml
index 2ae3cf4..904e53c 100644
--- a/sample/src/main/res/layout/activity_status_view.xml
+++ b/sample/src/main/res/layout/activity_status_view.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout 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"
@@ -61,4 +61,4 @@
             android:layout_gravity="center"
             android:layout_height="wrap_content" />
     </FrameLayout>
-</android.support.constraint.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/sample/src/main/res/layout/activity_view.xml b/sample/src/main/res/layout/activity_view.xml
index 59b1713..beca33f 100644
--- a/sample/src/main/res/layout/activity_view.xml
+++ b/sample/src/main/res/layout/activity_view.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.core.widget.NestedScrollView 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"
@@ -21,7 +21,7 @@
             android:scaleType="centerCrop"
             android:src="@drawable/girl" />
 
-        <android.support.constraint.ConstraintLayout
+        <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:background="@android:color/white"
@@ -77,7 +77,7 @@
                 app:layout_constraintLeft_toRightOf="@+id/tv_service"
                 app:layout_constraintRight_toRightOf="parent"
                 app:layout_constraintTop_toTopOf="parent" />
-        </android.support.constraint.ConstraintLayout>
+        </androidx.constraintlayout.widget.ConstraintLayout>
 
         <View
             android:id="@+id/divider_1"
@@ -92,11 +92,11 @@
             android:layout_marginTop="10dp"
             android:background="@color/colorLine" />
 
-        <android.support.v7.widget.RecyclerView
+        <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/recyclerView"
             android:layout_width="match_parent"
             android:layout_height="wrap_content" />
 
 
     </LinearLayout>
-</android.support.v4.widget.NestedScrollView>
\ No newline at end of file
+</androidx.core.widget.NestedScrollView>
\ No newline at end of file
diff --git a/sample/src/main/res/layout/activity_view_skeleton.xml b/sample/src/main/res/layout/activity_view_skeleton.xml
index 29d0bd5..64fea55 100644
--- a/sample/src/main/res/layout/activity_view_skeleton.xml
+++ b/sample/src/main/res/layout/activity_view_skeleton.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout 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"
@@ -272,4 +272,4 @@
         android:layout_marginLeft="10dp"
         android:layout_height="0.5dp"
         android:id="@+id/divider2" />
-</android.support.constraint.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/sample/src/main/res/layout/item_news.xml b/sample/src/main/res/layout/item_news.xml
index 1b04e7c..4561f45 100644
--- a/sample/src/main/res/layout/item_news.xml
+++ b/sample/src/main/res/layout/item_news.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="130dp"
@@ -71,4 +71,4 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintLeft_toRightOf="parent" />
-</android.support.constraint.ConstraintLayout>
\ No newline at end of file
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/sample/src/main/res/layout/item_skeleton_news.xml b/sample/src/main/res/layout/item_skeleton_news.xml
index 58774fe..f9fe9f0 100644
--- a/sample/src/main/res/layout/item_skeleton_news.xml
+++ b/sample/src/main/res/layout/item_skeleton_news.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="130dp"
@@ -67,4 +67,4 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintLeft_toRightOf="parent" />
-</android.support.constraint.ConstraintLayout>
\ No newline at end of file
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/sample/src/main/res/layout/item_title_more.xml b/sample/src/main/res/layout/item_title_more.xml
index 21e6bdc..a558af9 100644
--- a/sample/src/main/res/layout/item_title_more.xml
+++ b/sample/src/main/res/layout/item_title_more.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:paddingLeft="16dp"
@@ -26,4 +26,4 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
-</android.support.constraint.ConstraintLayout>
\ No newline at end of file
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/sample/src/main/res/layout/item_topic.xml b/sample/src/main/res/layout/item_topic.xml
index 75e0549..6a6bd0e 100644
--- a/sample/src/main/res/layout/item_topic.xml
+++ b/sample/src/main/res/layout/item_topic.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout
+<androidx.constraintlayout.widget.ConstraintLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/layout_root"
     xmlns:app="http://schemas.android.com/apk/res-auto"
@@ -68,4 +68,4 @@
         android:layout_marginLeft="10dp"
         android:layout_height="0.5dp"
         android:id="@+id/divider" />
-</android.support.constraint.ConstraintLayout>
\ No newline at end of file
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file