启动模式standard生命周期变化

//第一次启动V/MainActivity:  MainActivity  onCreate  V/MainActivity:  MainActivity  onStart  V/MainActivity:  MainActivity  onResume  //这时点击横屏V/MainActivity:  MainActivity  onPause  V/MainActivity:  MainActivity  onResume  V/MainActivity:  MainActivity  onPause  V/MainActivity:  MainActivity  onStop  V/MainActivity:  MainActivity  onDestroy  V/MainActivity:  MainActivity  onCreate  V/MainActivity:  MainActivity  onStart  V/MainActivity:  MainActivity  onResume  //切换成 竖屏时V/MainActivity:  MainActivity  onPause V/MainActivity:  MainActivity  onStop  V/MainActivity:  MainActivity  onDestroy  V/MainActivity:  MainActivity  onCreate  V/MainActivity:  MainActivity  onStart  V/MainActivity:  MainActivity  onResume  复制代码

以上看出 standard（默认）默认启动模式切换屏幕时 先销毁在创建 ，并且在销毁时运行了两次 onPause方法

启动模式 singleTask 变化

//第一次创建 （竖屏）V/TwoActivity:  TwoActivity  onCreate  V/TwoActivity:  TwoActivity  onStart  V/TwoActivity:  TwoActivity  onResume  //点击 切换横屏V/TwoActivity:  TwoActivity  onPause  V/TwoActivity:  TwoActivity  onStop  V/TwoActivity:  TwoActivity  onDestroy  V/TwoActivity:  TwoActivity  onCreate  V/TwoActivity:  TwoActivity  onStart  V/TwoActivity:  TwoActivity  onResume  //再次切换  竖屏V/TwoActivity:  TwoActivity  onPause  V/TwoActivity:  TwoActivity  onStop  V/TwoActivity:  TwoActivity  onDestroy  V/TwoActivity:  TwoActivity  onCreate  V/TwoActivity:  TwoActivity  onStart  V/TwoActivity:  TwoActivity  onResume  复制代码

由以上横竖屏切换的生命周期变化来看，singleTask 和 standard （默认）没有区别 ； 测试发现 四种加载模式 当横竖屏切换时 界面都时一样的 变化流程