Switching between activities without losing data

Issue

I keep losing data when pressing the back button after going back from activity 2 to 1.

when passing the data to activity 2 I'm using

   intent = new Intent(getApplicationContext(), secondactivity.class);
   startActivity(intent);

to launch the second activity. is it possible not to lose the data without using sharedpreference when pressing the back button?

Solution

You can store your data in the Application class and use it everywhere

Create a class:

public class MyCustomApplication extends Application {
   String myData = "";
}

in manifest add class name as android:name

<application 
   android:name=".MyCustomApplication"
   android:icon="@drawable/icon" 
   android:label="@string/app_name" 
...>

access it like this from any activity

 String myData = ((MyCustomApplication)getApplication()).myData; 
((MyCustomApplication)getApplication()).myData = "new value";

Answered By - merwan ezio