change to android x instead of android.support

circularprogressindicator/build.gradle

@@ -23,5 +23,5 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.android.support:support-annotations:27.1.1'
+    implementation "androidx.annotation:annotation:1.1.0"
 }

circularprogressindicator/src/main/java/antonkozyriatskyi/circularprogressindicator/CircularProgressIndicator.java

@@ -18,12 +18,12 @@
 import android.graphics.Shader;
 import android.graphics.SweepGradient;
 import android.os.Build;
-import android.support.annotation.ColorInt;
-import android.support.annotation.Dimension;
-import android.support.annotation.IntDef;
-import android.support.annotation.IntRange;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
+import androidx.annotation.ColorInt;
+import androidx.annotation.Dimension;
+import androidx.annotation.IntDef;
+import androidx.annotation.IntRange;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import android.text.TextPaint;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;

circularprogressindicator/src/main/java/antonkozyriatskyi/circularprogressindicator/PatternProgressTextAdapter.java

@@ -1,6 +1,6 @@
 package antonkozyriatskyi.circularprogressindicator;
 
-import android.support.annotation.NonNull;
+import androidx.annotation.NonNull;
 
 /**
  * Created by Anton on 06.06.2018.