Activity生命周期

Activity生命周期

Oncreate:第一次创建时

Onstart：activity可见时

Onresume：activity获取焦点时

Onpause：启动其他activity时

Onstop：activity不可见时

Onrestart：已经创建过，再次可见

Ondestory：销毁，调用finish时或系统资源紧张被kill时

 

 

一：firistActivity启动secondactivity,并且secondactivity把firistActivity完全遮住

firistActivity.Oncreate

firistActivity.Onstart

firistActivity.Onresume

--启动secondactivity，并且secondactivity把firistActivity完全遮住

firistActivity.Onpause

secondactivity.Oncreate

secondactivity.Onstart

secondactivity.Onresume

firistActivity.onstop

--按返回，重新回到firistActivity

Secondactivity.Onpause

firistActivity.Onrestart

firistActivity.Onstart

firistActivity.Onresume

Secondactivity.onstop

 

二：firistActivity启动secondactivity，并且secondactivity是对话框风格activity

firistActivity.Oncreate

firistActivity.Onstart

firistActivity.Onresume

--启动secondactivity，并且secondactivity是对话框风格activity

firistActivity.Onpause

secondactivity.Oncreate

secondactivity.Onstart

secondactivity.Onresume

--按返回，重新回到firistActivity

Secondactivity.Onpause

firistActivity.Onresume

Secondactivity.onstop