What is launch modes in android

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Accepted Answer

Launch modes determine how a new instance of an activity is associated with the current task.

There are four launch modes: standard, singleTop, singleTask, and singleInstance.
Standard is the default mode and creates a new instance of the activity every time it is launched.
SingleTop mode checks if there is already an instance of the activity at the top of the task stack and reuses it if possible.
SingleTask mode creates a new task for the activity and places it at the root of the stack.
SingleInstance mode is similar to singleTask, but the activity is always launched in a new task and no other activities can be launched into that task.
Launch modes are specified in the AndroidManifest.xml file.
Launch modes are useful for managing the back stack and controlling how activities are launched and reused.

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