diff --git a/.idea/caches/build_file_checksums.ser b/.idea/caches/build_file_checksums.ser
index 8082d93..81d8256 100644
Binary files a/.idea/caches/build_file_checksums.ser and b/.idea/caches/build_file_checksums.ser differ
diff --git a/.idea/caches/gradle_models.ser b/.idea/caches/gradle_models.ser
index 2ae4646..be71df4 100644
Binary files a/.idea/caches/gradle_models.ser and b/.idea/caches/gradle_models.ser differ
diff --git a/gradle.properties b/gradle.properties
index 9e6fce1..aac7c9b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -9,8 +9,6 @@
 
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
-android.enableJetifier=true
-android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536m
 
 # When configured, Gradle will run in incubating parallel mode.
diff --git a/library/build.gradle b/library/build.gradle
index 1991a91..bdc6398 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -21,7 +21,7 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation 'androidx.appcompat:appcompat:1.0.2'
-    implementation 'androidx.cardview:cardview:1.0.0'
-    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'com.android.support:appcompat-v7:28.+'
+    implementation 'com.android.support:cardview-v7:28.+'
+    implementation 'com.android.support:design:28.+'
 }
diff --git a/library/src/main/java/io/rmiri/skeleton/SkeletonView.java b/library/src/main/java/io/rmiri/skeleton/SkeletonView.java
index d1418c3..f158063 100644
--- a/library/src/main/java/io/rmiri/skeleton/SkeletonView.java
+++ b/library/src/main/java/io/rmiri/skeleton/SkeletonView.java
@@ -2,11 +2,11 @@
 
 import android.content.Context;
 import android.os.Build;
-import androidx.annotation.AttrRes;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.RequiresApi;
-import androidx.annotation.StyleRes;
+import android.support.annotation.AttrRes;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.annotation.RequiresApi;
+import android.support.annotation.StyleRes;
 import android.util.AttributeSet;
 
 import io.rmiri.skeleton.master.SkeletonMaster;
diff --git a/library/src/main/java/io/rmiri/skeleton/SkeletonViewGroup.java b/library/src/main/java/io/rmiri/skeleton/SkeletonViewGroup.java
index aef186b..bed4f2f 100644
--- a/library/src/main/java/io/rmiri/skeleton/SkeletonViewGroup.java
+++ b/library/src/main/java/io/rmiri/skeleton/SkeletonViewGroup.java
@@ -11,11 +11,11 @@
 import android.graphics.RectF;
 import android.graphics.Shader;
 import android.os.Build;
-import androidx.annotation.AttrRes;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.RequiresApi;
-import androidx.annotation.StyleRes;
+import android.support.annotation.AttrRes;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.annotation.RequiresApi;
+import android.support.annotation.StyleRes;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.util.Pair;
@@ -24,8 +24,8 @@
 
 import java.util.ArrayList;
 
-import io.rmiri.skeleton.master.SkeletonModel;
 import io.rmiri.skeleton.master.SkeletonMaster;
+import io.rmiri.skeleton.master.SkeletonModel;
 import io.rmiri.skeleton.utils.CLog;
 import io.rmiri.skeleton.utils.ColorUtils;
 
diff --git a/library/src/main/java/io/rmiri/skeleton/master/AdapterSkeleton.java b/library/src/main/java/io/rmiri/skeleton/master/AdapterSkeleton.java
index 6cb662e..3a97c73 100644
--- a/library/src/main/java/io/rmiri/skeleton/master/AdapterSkeleton.java
+++ b/library/src/main/java/io/rmiri/skeleton/master/AdapterSkeleton.java
@@ -1,12 +1,11 @@
 package io.rmiri.skeleton.master;
 
 import android.content.Context;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewTreeObserver;
 
-import androidx.recyclerview.widget.RecyclerView;
-
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
diff --git a/library/src/main/java/io/rmiri/skeleton/master/SkeletonConfig.java b/library/src/main/java/io/rmiri/skeleton/master/SkeletonConfig.java
index 35e3936..109399e 100644
--- a/library/src/main/java/io/rmiri/skeleton/master/SkeletonConfig.java
+++ b/library/src/main/java/io/rmiri/skeleton/master/SkeletonConfig.java
@@ -1,6 +1,7 @@
 package io.rmiri.skeleton.master;
 
-import androidx.recyclerview.widget.RecyclerView;
+
+import android.support.v7.widget.RecyclerView;
 
 /**
  * Created by Rasoul Miri on 8/22/17.
diff --git a/library/src/main/java/io/rmiri/skeleton/master/SkeletonMaster.java b/library/src/main/java/io/rmiri/skeleton/master/SkeletonMaster.java
index 118f3b1..f9d7fc4 100644
--- a/library/src/main/java/io/rmiri/skeleton/master/SkeletonMaster.java
+++ b/library/src/main/java/io/rmiri/skeleton/master/SkeletonMaster.java
@@ -3,11 +3,11 @@
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.os.Build;
-import androidx.annotation.AttrRes;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.RequiresApi;
-import androidx.annotation.StyleRes;
+import android.support.annotation.AttrRes;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.annotation.RequiresApi;
+import android.support.annotation.StyleRes;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.View;
diff --git a/sample/build.gradle b/sample/build.gradle
index 9b65f90..2cb043d 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -9,7 +9,7 @@ android {
         targetSdkVersion 28
         versionCode 1
         versionName "1.0.0"
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 
         // Vector support for lower 21
         vectorDrawables.useSupportLibrary true
@@ -25,9 +25,9 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation project(':library')
-    implementation 'androidx.appcompat:appcompat:1.0.2'
-    implementation 'androidx.cardview:cardview:1.0.0'
-    implementation 'com.google.android.material:material:1.0.0'
+    implementation 'com.android.support:appcompat-v7:28.+'
+    implementation 'com.android.support:cardview-v7:28.+'
+    implementation 'com.android.support:design:28.+'
     implementation 'com.squareup.picasso:picasso:2.5.2'
+    implementation project(':library')
 }
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/MainActivity.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/MainActivity.java
index 7cf5001..f2ff025 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/MainActivity.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/MainActivity.java
@@ -2,11 +2,10 @@
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.AppCompatButton;
 import android.view.View;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.AppCompatButton;
-
 import io.rmiri.skeleton.sample.R;
 import io.rmiri.skeleton.sample.activity.java.addViewsByJava.AddViewsByJavaActivity;
 import io.rmiri.skeleton.sample.activity.java.gradientJava.GradientJavaActivity;
@@ -16,6 +15,8 @@
 import io.rmiri.skeleton.sample.activity.xml.gradientXml.GradientXmlActivity;
 import io.rmiri.skeleton.sample.activity.xml.shapeXml.ShapeXmlActivity;
 
+;
+
 
 public class MainActivity extends AppCompatActivity implements View.OnClickListener {
 
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/addViewsByJava/AddViewsByJavaActivity.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/addViewsByJava/AddViewsByJavaActivity.java
index 3432962..b889540 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/addViewsByJava/AddViewsByJavaActivity.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/addViewsByJava/AddViewsByJavaActivity.java
@@ -1,14 +1,13 @@
 package io.rmiri.skeleton.sample.activity.java.addViewsByJava;
 
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.AppCompatImageButton;
+import android.support.v7.widget.Toolbar;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.RelativeLayout;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.AppCompatImageButton;
-import androidx.appcompat.widget.Toolbar;
-
 import java.util.ArrayList;
 
 import io.rmiri.skeleton.SkeletonViewGroup;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/gradientJava/GradientJavaActivity.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/gradientJava/GradientJavaActivity.java
index 1ea5314..c45f6fb 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/gradientJava/GradientJavaActivity.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/gradientJava/GradientJavaActivity.java
@@ -2,13 +2,12 @@
 
 import android.os.Bundle;
 import android.os.Handler;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.Toolbar;
 import android.view.View;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-
 import java.util.ArrayList;
 
 import io.rmiri.skeleton.master.IsCanSetAdapterListener;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/gradientJava/GradientJavaAdapter.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/gradientJava/GradientJavaAdapter.java
index 3487b59..d205a16 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/gradientJava/GradientJavaAdapter.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/java/gradientJava/GradientJavaAdapter.java
@@ -2,16 +2,15 @@
 
 
 import android.content.Context;
+import android.support.v7.widget.AppCompatImageButton;
+import android.support.v7.widget.AppCompatImageView;
+import android.support.v7.widget.CardView;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
-import androidx.appcompat.widget.AppCompatImageButton;
-import androidx.appcompat.widget.AppCompatImageView;
-import androidx.cardview.widget.CardView;
-import androidx.recyclerview.widget.RecyclerView;
-
 import com.squareup.picasso.Picasso;
 
 import java.util.ArrayList;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/autoItemsCountXml/AutoItemsCountXmlActivity.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/autoItemsCountXml/AutoItemsCountXmlActivity.java
index 6ef9bc8..718f3a3 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/autoItemsCountXml/AutoItemsCountXmlActivity.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/autoItemsCountXml/AutoItemsCountXmlActivity.java
@@ -2,13 +2,12 @@
 
 import android.os.Bundle;
 import android.os.Handler;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.Toolbar;
 import android.view.View;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-
 import java.util.ArrayList;
 
 import io.rmiri.skeleton.master.IsCanSetAdapterListener;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/autoItemsCountXml/AutoItemsCountXmlAdapter.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/autoItemsCountXml/AutoItemsCountXmlAdapter.java
index 9c579d6..cf5c615 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/autoItemsCountXml/AutoItemsCountXmlAdapter.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/autoItemsCountXml/AutoItemsCountXmlAdapter.java
@@ -2,13 +2,12 @@
 
 
 import android.content.Context;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
-import androidx.recyclerview.widget.RecyclerView;
-
 import java.util.ArrayList;
 
 import io.rmiri.skeleton.SkeletonViewGroup;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade1Xml/Fade1XmlActivity.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade1Xml/Fade1XmlActivity.java
index a88f1c5..b7d0d51 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade1Xml/Fade1XmlActivity.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade1Xml/Fade1XmlActivity.java
@@ -2,13 +2,12 @@
 
 import android.os.Bundle;
 import android.os.Handler;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.Toolbar;
 import android.view.View;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-
 import java.util.ArrayList;
 
 import io.rmiri.skeleton.master.IsCanSetAdapterListener;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade1Xml/FadeXml1Adapter.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade1Xml/FadeXml1Adapter.java
index c59abe1..1590540 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade1Xml/FadeXml1Adapter.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade1Xml/FadeXml1Adapter.java
@@ -2,16 +2,15 @@
 
 
 import android.content.Context;
+import android.support.v7.widget.AppCompatImageButton;
+import android.support.v7.widget.AppCompatImageView;
+import android.support.v7.widget.CardView;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
-import androidx.appcompat.widget.AppCompatImageButton;
-import androidx.appcompat.widget.AppCompatImageView;
-import androidx.cardview.widget.CardView;
-import androidx.recyclerview.widget.RecyclerView;
-
 import com.squareup.picasso.Picasso;
 
 import java.util.ArrayList;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade2Xml/FadeXml2Activity.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade2Xml/FadeXml2Activity.java
index 00ce382..7107f72 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade2Xml/FadeXml2Activity.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade2Xml/FadeXml2Activity.java
@@ -2,13 +2,12 @@
 
 import android.os.Bundle;
 import android.os.Handler;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.Toolbar;
 import android.view.View;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-
 import java.util.ArrayList;
 
 import io.rmiri.skeleton.master.IsCanSetAdapterListener;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade2Xml/FadeXml2Adapter.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade2Xml/FadeXml2Adapter.java
index 874bfcb..a89c5b4 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade2Xml/FadeXml2Adapter.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/fade2Xml/FadeXml2Adapter.java
@@ -2,16 +2,15 @@
 
 
 import android.content.Context;
+import android.support.v7.widget.AppCompatImageButton;
+import android.support.v7.widget.AppCompatImageView;
+import android.support.v7.widget.CardView;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
-import androidx.appcompat.widget.AppCompatImageButton;
-import androidx.appcompat.widget.AppCompatImageView;
-import androidx.cardview.widget.CardView;
-import androidx.recyclerview.widget.RecyclerView;
-
 import com.squareup.picasso.Picasso;
 
 import java.util.ArrayList;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/gradientXml/GradientXmlActivity.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/gradientXml/GradientXmlActivity.java
index 8f410d4..a7f5371 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/gradientXml/GradientXmlActivity.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/gradientXml/GradientXmlActivity.java
@@ -2,13 +2,12 @@
 
 import android.os.Bundle;
 import android.os.Handler;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.Toolbar;
 import android.view.View;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-
 import java.util.ArrayList;
 
 import io.rmiri.skeleton.master.IsCanSetAdapterListener;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/gradientXml/GradientXmlAdapter.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/gradientXml/GradientXmlAdapter.java
index f320f82..a0be4ee 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/gradientXml/GradientXmlAdapter.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/gradientXml/GradientXmlAdapter.java
@@ -2,16 +2,15 @@
 
 
 import android.content.Context;
+import android.support.v7.widget.AppCompatImageButton;
+import android.support.v7.widget.AppCompatImageView;
+import android.support.v7.widget.CardView;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 
-import androidx.appcompat.widget.AppCompatImageButton;
-import androidx.appcompat.widget.AppCompatImageView;
-import androidx.cardview.widget.CardView;
-import androidx.recyclerview.widget.RecyclerView;
-
 import com.squareup.picasso.Picasso;
 
 import java.util.ArrayList;
diff --git a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/shapeXml/ShapeXmlActivity.java b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/shapeXml/ShapeXmlActivity.java
index f428d41..7eb258a 100644
--- a/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/shapeXml/ShapeXmlActivity.java
+++ b/sample/src/main/java/io/rmiri/skeleton/sample/activity/xml/shapeXml/ShapeXmlActivity.java
@@ -2,12 +2,11 @@
 
 import android.os.Bundle;
 import android.os.Handler;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
 import android.view.View;
 import android.widget.TextView;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
-
 import io.rmiri.skeleton.SkeletonViewGroup;
 import io.rmiri.skeleton.sample.R;
 
diff --git a/sample/src/main/res/layout/activity_add_views_by_java.xml b/sample/src/main/res/layout/activity_add_views_by_java.xml
index d7d841a..511b15e 100644
--- a/sample/src/main/res/layout/activity_add_views_by_java.xml
+++ b/sample/src/main/res/layout/activity_add_views_by_java.xml
@@ -7,7 +7,7 @@
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <androidx.appcompat.widget.Toolbar
+    <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -40,7 +40,7 @@
             android:gravity="top|start"
             android:text="Simple" />
 
-        <androidx.appcompat.widget.AppCompatImageButton
+        <android.support.v7.widget.AppCompatImageButton
             android:id="@+id/btn1"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -50,7 +50,7 @@
             android:padding="8dp"
             app:srcCompat="@drawable/ic_compare" />
 
-        <androidx.appcompat.widget.AppCompatImageButton
+        <android.support.v7.widget.AppCompatImageButton
             android:id="@+id/btn2"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -76,7 +76,7 @@
             android:gravity="top|start"
             android:text="Start and End View" />
 
-        <androidx.appcompat.widget.AppCompatImageButton
+        <android.support.v7.widget.AppCompatImageButton
             android:id="@+id/btn3"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -86,7 +86,7 @@
             android:padding="8dp"
             app:srcCompat="@drawable/ic_compare" />
 
-        <androidx.appcompat.widget.AppCompatImageButton
+        <android.support.v7.widget.AppCompatImageButton
             android:id="@+id/btn4"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -112,7 +112,7 @@
             android:gravity="top|start"
             android:text="Custom width and height" />
 
-        <androidx.appcompat.widget.AppCompatImageButton
+        <android.support.v7.widget.AppCompatImageButton
             android:id="@+id/btn5"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -122,7 +122,7 @@
             android:padding="8dp"
             app:srcCompat="@drawable/ic_compare" />
 
-        <androidx.appcompat.widget.AppCompatImageButton
+        <android.support.v7.widget.AppCompatImageButton
             android:id="@+id/btn6"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -148,7 +148,7 @@
             android:gravity="top|start"
             android:text="Match View" />
 
-        <androidx.appcompat.widget.AppCompatImageButton
+        <android.support.v7.widget.AppCompatImageButton
             android:id="@+id/btn7"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -158,7 +158,7 @@
             android:padding="8dp"
             app:srcCompat="@drawable/ic_compare" />
 
-        <androidx.appcompat.widget.AppCompatImageButton
+        <android.support.v7.widget.AppCompatImageButton
             android:id="@+id/btn8"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
diff --git a/sample/src/main/res/layout/activity_auto_items_count_xml.xml b/sample/src/main/res/layout/activity_auto_items_count_xml.xml
index 484e42d..15ce61c 100644
--- a/sample/src/main/res/layout/activity_auto_items_count_xml.xml
+++ b/sample/src/main/res/layout/activity_auto_items_count_xml.xml
@@ -6,7 +6,7 @@
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <androidx.appcompat.widget.Toolbar
+    <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -16,7 +16,7 @@
         app:title="Skeleton"
         app:titleTextColor="@android:color/white" />
 
-    <androidx.recyclerview.widget.RecyclerView
+    <android.support.v7.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
diff --git a/sample/src/main/res/layout/activity_fade_1_xml.xml b/sample/src/main/res/layout/activity_fade_1_xml.xml
index 484e42d..15ce61c 100644
--- a/sample/src/main/res/layout/activity_fade_1_xml.xml
+++ b/sample/src/main/res/layout/activity_fade_1_xml.xml
@@ -6,7 +6,7 @@
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <androidx.appcompat.widget.Toolbar
+    <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -16,7 +16,7 @@
         app:title="Skeleton"
         app:titleTextColor="@android:color/white" />
 
-    <androidx.recyclerview.widget.RecyclerView
+    <android.support.v7.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
diff --git a/sample/src/main/res/layout/activity_fade_xml_2.xml b/sample/src/main/res/layout/activity_fade_xml_2.xml
index 484e42d..15ce61c 100644
--- a/sample/src/main/res/layout/activity_fade_xml_2.xml
+++ b/sample/src/main/res/layout/activity_fade_xml_2.xml
@@ -6,7 +6,7 @@
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <androidx.appcompat.widget.Toolbar
+    <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -16,7 +16,7 @@
         app:title="Skeleton"
         app:titleTextColor="@android:color/white" />
 
-    <androidx.recyclerview.widget.RecyclerView
+    <android.support.v7.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
diff --git a/sample/src/main/res/layout/activity_gradient_java.xml b/sample/src/main/res/layout/activity_gradient_java.xml
index 484e42d..15ce61c 100644
--- a/sample/src/main/res/layout/activity_gradient_java.xml
+++ b/sample/src/main/res/layout/activity_gradient_java.xml
@@ -6,7 +6,7 @@
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <androidx.appcompat.widget.Toolbar
+    <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -16,7 +16,7 @@
         app:title="Skeleton"
         app:titleTextColor="@android:color/white" />
 
-    <androidx.recyclerview.widget.RecyclerView
+    <android.support.v7.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
diff --git a/sample/src/main/res/layout/activity_gradient_xml.xml b/sample/src/main/res/layout/activity_gradient_xml.xml
index 484e42d..15ce61c 100644
--- a/sample/src/main/res/layout/activity_gradient_xml.xml
+++ b/sample/src/main/res/layout/activity_gradient_xml.xml
@@ -6,7 +6,7 @@
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <androidx.appcompat.widget.Toolbar
+    <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -16,7 +16,7 @@
         app:title="Skeleton"
         app:titleTextColor="@android:color/white" />
 
-    <androidx.recyclerview.widget.RecyclerView
+    <android.support.v7.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
diff --git a/sample/src/main/res/layout/activity_main.xml b/sample/src/main/res/layout/activity_main.xml
index 485c9a4..2a6d5a9 100644
--- a/sample/src/main/res/layout/activity_main.xml
+++ b/sample/src/main/res/layout/activity_main.xml
@@ -6,7 +6,7 @@
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <androidx.appcompat.widget.Toolbar
+    <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -15,7 +15,7 @@
         app:title="Skeleton"
         app:titleTextColor="@android:color/white" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <android.support.v7.widget.AppCompatButton
         android:id="@+id/sampleGradientXmlBtn"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -24,7 +24,7 @@
         android:layout_marginEnd="16dp"
         android:text="Sample Gradient (XML)" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <android.support.v7.widget.AppCompatButton
         android:id="@+id/sampleFadeXml1Btn"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -32,7 +32,7 @@
         android:layout_marginEnd="16dp"
         android:text="Sample Fade 1 (XML)" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <android.support.v7.widget.AppCompatButton
         android:id="@+id/sampleFadeXml2Btn"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -40,7 +40,7 @@
         android:layout_marginEnd="16dp"
         android:text="Sample Fade 2 (XML)" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <android.support.v7.widget.AppCompatButton
         android:id="@+id/sampleShapeXmlBtn"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -48,7 +48,7 @@
         android:layout_marginEnd="16dp"
         android:text="Sample Shape (XML)" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <android.support.v7.widget.AppCompatButton
         android:id="@+id/sampleAutoItemsCountXmlBtn"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -56,7 +56,7 @@
         android:layout_marginEnd="16dp"
         android:text="Sample Auto Items Count(XML)(new)" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <android.support.v7.widget.AppCompatButton
         android:id="@+id/sampleGradientJavaBtn"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -64,7 +64,7 @@
         android:layout_marginEnd="16dp"
         android:text="Sample Gradient (JAVA) (new)" />
 
-    <androidx.appcompat.widget.AppCompatButton
+    <android.support.v7.widget.AppCompatButton
         android:id="@+id/sampleAddViewsByJavaBtn"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
diff --git a/sample/src/main/res/layout/activity_shape_xml.xml b/sample/src/main/res/layout/activity_shape_xml.xml
index e598596..b9893b6 100644
--- a/sample/src/main/res/layout/activity_shape_xml.xml
+++ b/sample/src/main/res/layout/activity_shape_xml.xml
@@ -7,7 +7,7 @@
     android:fitsSystemWindows="true"
     android:orientation="vertical">
 
-    <androidx.appcompat.widget.Toolbar
+    <android.support.v7.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
@@ -89,7 +89,7 @@
                     android:layout_height="wrap_content"
                     Skeleton:SK_shapeType="oval">
 
-                    <androidx.appcompat.widget.AppCompatImageButton
+                    <android.support.v7.widget.AppCompatImageButton
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:background="@android:color/transparent"
diff --git a/sample/src/main/res/layout/item_auto_items_count_xml.xml b/sample/src/main/res/layout/item_auto_items_count_xml.xml
index f6cb9fe..f3f0d8c 100644
--- a/sample/src/main/res/layout/item_auto_items_count_xml.xml
+++ b/sample/src/main/res/layout/item_auto_items_count_xml.xml
@@ -1,4 +1,4 @@
-<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:Skeleton="http://schemas.android.com/apk/res-auto"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/cardView"
@@ -53,7 +53,7 @@
 
             </io.rmiri.skeleton.SkeletonView>
 
-            <androidx.appcompat.widget.AppCompatImageButton
+            <android.support.v7.widget.AppCompatImageButton
                 android:id="@+id/arrowACImgBtn"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -66,4 +66,4 @@
 
         </RelativeLayout>
     </io.rmiri.skeleton.SkeletonViewGroup>
-</androidx.cardview.widget.CardView>
+</android.support.v7.widget.CardView>
diff --git a/sample/src/main/res/layout/item_fade_xml_1.xml b/sample/src/main/res/layout/item_fade_xml_1.xml
index 1e80bff..a58cef1 100644
--- a/sample/src/main/res/layout/item_fade_xml_1.xml
+++ b/sample/src/main/res/layout/item_fade_xml_1.xml
@@ -1,4 +1,4 @@
-<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:Skeleton="http://schemas.android.com/apk/res-auto"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/cardView"
@@ -43,7 +43,7 @@
                     Skeleton:SK_padding="0dp"
                     Skeleton:SK_shapeType="rect">
 
-                    <androidx.appcompat.widget.AppCompatImageView
+                    <android.support.v7.widget.AppCompatImageView
                         android:id="@+id/photoACImgV"
                         android:layout_width="match_parent"
                         android:layout_height="230dp"
@@ -125,7 +125,7 @@
             </RelativeLayout>
 
             <!--divider-->
-            <androidx.appcompat.widget.AppCompatImageView
+            <android.support.v7.widget.AppCompatImageView
                 android:layout_width="match_parent"
                 android:layout_height="1dp"
                 android:layout_marginEnd="8dp"
@@ -141,7 +141,7 @@
                 android:paddingStart="8dp"
                 android:paddingTop="4dp">
 
-                <androidx.appcompat.widget.AppCompatImageButton
+                <android.support.v7.widget.AppCompatImageButton
                     android:id="@+id/likeBtn"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -150,7 +150,7 @@
                     android:padding="8dp"
                     app:srcCompat="@drawable/ic_favorite" />
 
-                <androidx.appcompat.widget.AppCompatImageButton
+                <android.support.v7.widget.AppCompatImageButton
                     android:id="@+id/compareImgBtn"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -197,4 +197,4 @@
 
         </LinearLayout>
     </io.rmiri.skeleton.SkeletonViewGroup>
-</androidx.cardview.widget.CardView>
+</android.support.v7.widget.CardView>
diff --git a/sample/src/main/res/layout/item_fade_xml_2.xml b/sample/src/main/res/layout/item_fade_xml_2.xml
index 8666d61..d0ca9ca 100644
--- a/sample/src/main/res/layout/item_fade_xml_2.xml
+++ b/sample/src/main/res/layout/item_fade_xml_2.xml
@@ -1,4 +1,4 @@
-<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:Skeleton="http://schemas.android.com/apk/res-auto"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/cardView"
@@ -43,7 +43,7 @@
                     Skeleton:SK_padding="0dp"
                     Skeleton:SK_shapeType="rect">
 
-                    <androidx.appcompat.widget.AppCompatImageView
+                    <android.support.v7.widget.AppCompatImageView
                         android:id="@+id/photoACImgV"
                         android:layout_width="match_parent"
                         android:layout_height="230dp"
@@ -126,7 +126,7 @@
             </RelativeLayout>
 
             <!--divider-->
-            <androidx.appcompat.widget.AppCompatImageView
+            <android.support.v7.widget.AppCompatImageView
                 android:layout_width="match_parent"
                 android:layout_height="1dp"
                 android:layout_marginEnd="8dp"
@@ -150,7 +150,7 @@
                     Skeleton:SK_padding="8dp"
                     Skeleton:SK_shapeType="oval">
 
-                    <androidx.appcompat.widget.AppCompatImageButton
+                    <android.support.v7.widget.AppCompatImageButton
                         android:id="@+id/likeBtn"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
@@ -167,7 +167,7 @@
                     Skeleton:SK_padding="8dp"
                     Skeleton:SK_shapeType="oval">
 
-                    <androidx.appcompat.widget.AppCompatImageButton
+                    <android.support.v7.widget.AppCompatImageButton
                         android:id="@+id/compareImgBtn"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
@@ -214,4 +214,4 @@
             </RelativeLayout>
         </LinearLayout>
     </io.rmiri.skeleton.SkeletonViewGroup>
-</androidx.cardview.widget.CardView>
+</android.support.v7.widget.CardView>
diff --git a/sample/src/main/res/layout/item_gradient_java.xml b/sample/src/main/res/layout/item_gradient_java.xml
index 723756a..bd9d0c6 100644
--- a/sample/src/main/res/layout/item_gradient_java.xml
+++ b/sample/src/main/res/layout/item_gradient_java.xml
@@ -1,4 +1,4 @@
-<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/cardView"
     android:layout_width="match_parent"
@@ -21,7 +21,7 @@
             android:layout_width="match_parent"
             android:layout_height="230dp">
 
-            <androidx.appcompat.widget.AppCompatImageView
+            <android.support.v7.widget.AppCompatImageView
                 android:id="@+id/photoACImgV"
                 android:layout_width="match_parent"
                 android:layout_height="230dp"
@@ -74,7 +74,7 @@
                 android:textSize="14sp" />
         </RelativeLayout>
         <!--divider-->
-        <androidx.appcompat.widget.AppCompatImageView
+        <android.support.v7.widget.AppCompatImageView
             android:layout_width="match_parent"
             android:layout_height="1dp"
             android:layout_marginStart="8dp"
@@ -89,7 +89,7 @@
             android:paddingEnd="8dp"
             android:paddingBottom="4dp">
 
-            <androidx.appcompat.widget.AppCompatImageButton
+            <android.support.v7.widget.AppCompatImageButton
                 android:id="@+id/likeBtn"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -98,7 +98,7 @@
                 android:padding="8dp"
                 app:srcCompat="@drawable/ic_favorite" />
 
-            <androidx.appcompat.widget.AppCompatImageButton
+            <android.support.v7.widget.AppCompatImageButton
                 android:id="@+id/compareImgBtn"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
@@ -132,4 +132,4 @@
                 android:textSize="20sp" />
         </RelativeLayout>
     </LinearLayout>
-</androidx.cardview.widget.CardView>
+</android.support.v7.widget.CardView>
diff --git a/sample/src/main/res/layout/item_gradient_xml.xml b/sample/src/main/res/layout/item_gradient_xml.xml
index 971d3f7..0b6a2be 100644
--- a/sample/src/main/res/layout/item_gradient_xml.xml
+++ b/sample/src/main/res/layout/item_gradient_xml.xml
@@ -1,4 +1,4 @@
-<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:Skeleton="http://schemas.android.com/apk/res-auto"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/cardView"
@@ -43,7 +43,7 @@
                     Skeleton:SK_padding="0dp"
                     Skeleton:SK_shapeType="rect">
 
-                    <androidx.appcompat.widget.AppCompatImageView
+                    <android.support.v7.widget.AppCompatImageView
                         android:id="@+id/photoACImgV"
                         android:layout_width="match_parent"
                         android:layout_height="230dp"
@@ -126,7 +126,7 @@
             </RelativeLayout>
 
             <!--divider-->
-            <androidx.appcompat.widget.AppCompatImageView
+            <android.support.v7.widget.AppCompatImageView
                 android:layout_width="match_parent"
                 android:layout_height="1dp"
                 android:layout_marginEnd="8dp"
@@ -142,7 +142,7 @@
                 android:paddingStart="8dp"
                 android:paddingTop="4dp">
 
-                <androidx.appcompat.widget.AppCompatImageButton
+                <android.support.v7.widget.AppCompatImageButton
                     android:id="@+id/likeBtn"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -151,7 +151,7 @@
                     android:padding="8dp"
                     app:srcCompat="@drawable/ic_favorite" />
 
-                <androidx.appcompat.widget.AppCompatImageButton
+                <android.support.v7.widget.AppCompatImageButton
                     android:id="@+id/compareImgBtn"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
@@ -198,4 +198,4 @@
 
         </LinearLayout>
     </io.rmiri.skeleton.SkeletonViewGroup>
-</androidx.cardview.widget.CardView>
+</android.support.v7.widget.CardView>