It prevents problems with other applications using the same code.

It links up with the requestCode of the Activity in Manifest.

It identifies the request and helps the receiving Activity determine which result corresponds to which request.

It’s the Intent security key—it checks that it hasn’t been infected.

In the  onCreate()  method, you retrieve the result with the  getIntent().getResult()  method.

In the  onActivityResult()  method, you retrieve the information from the Intent passed as a parameter.

You retrieve the data using the  getIntent().getExtras()  method in any method of the life cycle.

In the  onSavedInstanceState()  method, the Bundle passed as a parameter allows you to retrieve the information of the closed Activity.

You can use a relational database to store the name as a String.

You can use the Intent of the Activity: it saves the name in between app launches.

You can use  SharedPreferences  to persist a String: it can be stored and retrieved with a constant key.

You can use a static variable, which persists the name in between app launches.