Use AndroidX

app/src/main/java/com/hippo/widget/IndicatingScrollView.java

@@ -22,10 +22,9 @@ import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Rect;
-import android.support.annotation.NonNull;
 import android.util.AttributeSet;
 import android.widget.ScrollView;
-
+import androidx.annotation.NonNull;
 import com.hippo.ehviewer.R;
 
 public class IndicatingScrollView extends ScrollView {