Add Demos License

README.md

@@ -32,4 +32,23 @@
 
 [《Android DataBinding使用详解（一）》](http://blog.csdn.net/kong_gu_you_lan/article/details/75628465)
 
-[《Android DataBinding使用详解（二）》](http://blog.csdn.net/kong_gu_you_lan/article/details/76020050)
+[《Android DataBinding使用详解（二）》](http://blog.csdn.net/kong_gu_you_lan/article/details/76020050)
+
+## License
+
+```
+Copyright (c) 2017 YangLe
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+```tions under the License.
+```