Activity生命周期

<code>
FirstActivity一开始
02-23 10:36:35.893 27957-27957/com.sjl.thinkinginjava E/log: FirstActivityonCreate
02-23 10:36:35.993 27957-27957/com.sjl.thinkinginjava E/log: FirstActivityonStart
02-23 10:36:35.993 27957-27957/com.sjl.thinkinginjava E/log: FirstActivityonResume

按下返回键
02-23 10:38:21.689 27957-27957/com.sjl.thinkinginjava E/log: FirstActivityonPause
02-23 10:38:22.254 27957-27957/com.sjl.thinkinginjava E/log: FirstActivityonStop
02-23 10:38:22.254 27957-27957/com.sjl.thinkinginjava E/log: FirstActivityonDestroy

点击按钮调到SecondActivity
02-23 10:40:44.194 773-773/com.sjl.thinkinginjava E/log: FirstActivityonPause
02-23 10:40:44.214 773-773/com.sjl.thinkinginjava E/log: SecondActivityonCreate
02-23 10:40:44.227 773-773/com.sjl.thinkinginjava E/log: SecondActivityonStart
02-23 10:40:44.227 773-773/com.sjl.thinkinginjava E/log: SecondActivityonResume
02-23 10:40:44.230 773-773/com.sjl.thinkinginjava E/OpenGLRenderer: PerfServiceNative_notifyRenderTime init fail!
02-23 10:40:44.665 773-773/com.sjl.thinkinginjava E/log: FirstActivityonStop

点击返回按钮（在SecondActivity中）

02-23 10:41:58.944 773-773/com.sjl.thinkinginjava E/log: SecondActivityonPause
02-23 10:41:58.971 773-773/com.sjl.thinkinginjava E/log: FirstActivityonRestart
02-23 10:41:58.973 773-773/com.sjl.thinkinginjava E/log: FirstActivityonStart
02-23 10:41:58.973 773-773/com.sjl.thinkinginjava E/log: FirstActivityonResume
02-23 10:41:59.276 773-773/com.sjl.thinkinginjava E/log: SecondActivityonStop
02-23 10:41:59.277 773-773/com.sjl.thinkinginjava E/log: SecondActivityonDestroy

点击按钮切换FirstActivity（在SecondActivity中）

02-23 10:43:01.842 773-773/com.sjl.thinkinginjava E/log: SecondActivityonPause
02-23 10:43:01.853 773-773/com.sjl.thinkinginjava E/log: FirstActivityonCreate
02-23 10:43:01.863 773-773/com.sjl.thinkinginjava E/log: FirstActivityonStart
02-23 10:43:01.864 773-773/com.sjl.thinkinginjava E/log: FirstActivityonResume
02-23 10:43:01.866 773-773/com.sjl.thinkinginjava E/OpenGLRenderer: PerfServiceNative_notifyRenderTime init fail!
02-23 10:43:02.286 773-773/com.sjl.thinkinginjava E/log: SecondActivityonStop

</code>