Question

Say I’m on my main activity and I start a new activity

MainActivity > NewActivity

And from NewActivity I press the back key

MainActivity < NewActivity

I want MainActivity to do something if it’s being displayed after NewActivity is closed, but not when MainActivity is run normally, such as when first running the application. Does anyone know if this is possible?

Answer 1

A couple of ideas:

• You can just set a flag in MainActivity when it fires up NewActivity.
• You can call startActivityForResult from MainActivity and arrange for NewActivity to set a result, which you will receive in MainActivity.onActivityResult() when NewActivity finishes.