![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
Among the 23 classic design patterns there is one called Builder pattern, the creation of ________in Android is a typical example of using this pattern, the pattern constrains the building details and also give you the convinience of chain call to a lot of methods such as setTitle,setMessage,setNegativeButton etc.