April 6th-April 10th work summary
1. During the compilation process, the generic information will be erased after the generic result is correctly checked, that is to say, the successfully compiled .class file does not contain any generic information.
Type wildcard? It replaces the specific type argument. Note that it is the actual parameter.
2. When ViewPager
uses ViewPager, pay attention to it in the declaration of the XML layout file.