Four startup modes active in Android

1, Standard: Each start will create a new instance of the activity

2, Singletop: When the stack top has the activity, then directly use, do not create

3, Singletask: will be in the stack to find out if there is an instance of the activity, if so, directly using

And put all the activities on top of this activity out of the stack.

4. SingleInstance: Start a new return stack to manage this activity

And this new return stack is used to manage the activity that needs to be shared.

Four startup modes active in Android