Android activity startup mode, androidactivity

Android activity startup mode, androidactivity

I. activity startup 4 middle mode:

2. The standard mode is the default start mode. A new instance will be created each time you start the instance. onCreate, onStart, and onResume will be called. A task stack can contain multiple instances, and each instance can belong to a different task stack. If A starts B (standard), B will be in the job stack where A is located. You can specify a new job stack for FLAG_ACTIVITY_NEW_TASK during startup.

SingleTop is located at the top of the stack. If yes, it will not be created. Otherwise, a new instance will be created.

If a singleTask has a required job stack and the activity has been created, no new job is created. The job stack is created before the activity is created.

SingleInstance only exists in a single task stack