增加几个常量

src/main/java/com/fanruan/api/macro/Constants.java

@@ -0,0 +1,23 @@
+package com.fanruan.api.macro;
+
+/**
+ * @author richie
+ * @version 10.0
+ * Created by richie on 2019-09-02
+ * 常量
+ */
+public interface Constants {
+
+    int CENTER = 0;
+
+    int TOP = 1;
+
+
+    int LEFT = 2;
+
+
+    int BOTTOM = 3;
+
+
+    int RIGHT = 4;
+}