Set corner_radius to custom dialog

app/src/main/res/drawable/dialog_shape.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid
+        android:color="@color/colorPrimary"/>
+    <corners
+        android:radius="8dp" />
+</shape>