initial empty project
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
new file mode 100644
index 0000000..55c1e59
--- /dev/null
+++ b/res/values/dimens.xml
@@ -0,0 +1,7 @@
+<resources>
+
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+
+</resources>