github地址：https://github.com/xiaoliang0227/android_launchMode_demo
Android有四种启动模式，分别为standard、singleTop、singleInstance、singleTask。设置启动模式可以在AndroidManifest.xml中设置Activity的launchMode属性，Activity的默认启动模式为standard。所以，如果想设置Activity为standard模式可以不用给launchMode设置属性值。
ActivityRecord{2bdeacf4 u0 com.zyl.demo.launchmode/.activity.SingleTaskModeActivity t35}]
ActivityRecord{2048d3ac u0 com.zyl.demo.launchmode/.activity.SingleTaskModeActivity t36}]
singleInstance模式跳转实例：
ActivityRecord{233b107 u0 com.zyl.demo.launchmode/.activity.StandardModeActivity t39},
ActivityRecord{1d3013cc u0 com.zyl.demo.launchmode/.activity.SingleTopModeActivity t39}]
Task id:#40
Activities=[
ActivityRecord{2229e7be u0 com.zyl.demo.launchmode/.activity.SingleInstanceModeActivity t40}]