diff --git a/lib/ansu_ui.dart b/lib/ansu_ui.dart
index 6e24451..0be0113 100644
--- a/lib/ansu_ui.dart
+++ b/lib/ansu_ui.dart
@@ -1,7 +1,3 @@
 library ansu_ui;
 
-/// A Calculator.
-class Calculator {
-  /// Returns [value] plus 1.
-  int addOne(int value) => value + 1;
-}
+export 'buttons/as_button.dart';
diff --git a/lib/buttons/as_button.dart b/lib/buttons/as_button.dart
new file mode 100644
index 0000000..b32f8e3
--- /dev/null
+++ b/lib/buttons/as_button.dart
@@ -0,0 +1,16 @@
+import 'package:flutter/material.dart';
+
+///安速按钮
+class ASButton extends StatefulWidget {
+  ASButton({Key key}) : super(key: key);
+
+  @override
+  _ASButtonState createState() => _ASButtonState();
+}
+
+class _ASButtonState extends State<ASButton> {
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox();
+  }
+}
diff --git a/test/ansu_ui_test.dart b/test/ansu_ui_test.dart
deleted file mode 100644
index aae6e6c..0000000
--- a/test/ansu_ui_test.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:ansu_ui/ansu_ui.dart';
-
-void main() {
-  test('adds one to input values', () {
-    final calculator = Calculator();
-    expect(calculator.addOne(2), 3);
-    expect(calculator.addOne(-7), -6);
-    expect(calculator.addOne(0), 1);
-    expect(() => calculator.addOne(null), throwsNoSuchMethodError);
-  });
-}