add tabbar example

Author: 2534290808

example/lib/tabbar_example.dart

@@ -0,0 +1,40 @@
+
+import 'package:flutter/material.dart';
+import 'package:animated_interpolation/animated_interpolation.dart';
+class TabBarExample extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: DefaultTabController(
+        length: 3,
+        child: Column(
+          children: <Widget>[
+            SmartTabBar(
+              indicatorBuilder: (context,controller,indicator,indicatorSize,tabKeys,old)=>SweetIndicatorPainter(
+                controller: controller,
+                indicatorSize: indicatorSize,
+                indicator: indicator,
+                tabKeys: tabKeys,
+                old: old
+              ),
+              tabs: <Widget>[
+                Tab(text: "1",),
+                Tab(text: "2",),
+                Tab(text: "3",)
+              ],
+            ),
+            Expanded(
+              child: TabBarView(
+                children: <Widget>[
+                  Container(),
+                  Container(),
+                  Container()
+                ],
+              ),
+            )
+          ],
+        ),
+      )
+    );
+  }
+}