89123

1.contentresolver call方法的使用
http://www.mamicode.com/info-detail-883422.html

 

2.volatile
http://www.importnew.com/24082.html
https://www.cnblogs.com/shangxiaofei/p/5564047.html

https://www.cnblogs.com/dengzz/p/5688021.html

 

3.volatile boolean和atomicboolean的区别

 

一条指令在cpu中的执行流程

4.https://blog.csdn.net/hb0556/article/details/26596301