diff --git a/android/NumUtils.java b/android/NumUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..5e5183eeea07cf0fddd221dad9be054d07896cbd
--- /dev/null
+++ b/android/NumUtils.java
@@ -0,0 +1,12 @@
+public class NumUtils{
+	//5的倍数，只要位数是0，5就可以
+    public static boolean is5PCount(Integer number) {
+        char lastChar = String.valueOf(number).charAt(String.valueOf(number).length() - 1);
+
+        if (lastChar == '5' || lastChar == '0') {
+            return true;
+        }
+
+        return false;
+    }
+}