Question

Here is my code. It just involves 2 buttons and a number counter that goes up and down as the buttons are pressed (both in integer value and text size). This activity is part of a larger application that follows the process:
1. splash screen
2. list menu
3. activity selected in menu (there are 3 options and the counter is one of them)

When i press the back button, it goes back to the list menu and when i click on the integer counter option, i want it to be restored exactly how it was
Any ideas on how i can do this?
Thanks!

public class StartingPoint extends Activity {
/** Called when the activity is first created. */

int counter;
Button add;
Button sub;
TextView display;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    counter=0;

    add= (Button) findViewById(R.id.bAdd);
    sub= (Button) findViewById(R.id.bSub);
    display= (TextView) findViewById(R.id.tvDisplay);

    add.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            counter++;
            display.setText(""+counter);
            display.setTextSize(counter);
        }
    });
    sub.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            counter--;
            display.setText(""+counter);
            display.setTextSize(counter);
        }
    });

}

}

Answer 1

You have two good options:

Either use SharedPreferences to store your variable onStop() and load it onStart() – How to use SharedPreferences in Android to store, fetch and edit values;

or, if it is just an integer, you can use the startActivityForResult method to instantiate your integer counter activity and capture the result from the activity, as explained in Android: Capturing the return of an activity.

Hope it helps!