Question

I have a randomly generated integer displayed on the screen and when the user clicks a button, I want that number to update with a new number or stay the same (depending on which button), but staying on the same activity.

How is the value refreshed/updated while staying on the same activity?

public class ClassName extends Activity implements OnClickListener  {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_name);
        int currentNum = randNum();
        TextView myTextView = (TextView) findViewById(R.id.current_number); 
        myTextView.setText("Current Number: " + String.valueOf(currentNum));
        okButton = (Button) findViewById(R.id.num_confirmation);
        okButton.setOnClickListener(this);
        changeButton = (Button) findViewById(R.id.change_num);
        changeButton.setOnClickListener(this);
        // set 'currentNumber' accordingly
        // reprint value
    }

    @Override
    public void onClick(View v) {

    }

One of the things I want to do is maintain the same value when a button is clicked (i.e. currentNum stays the same). The other thing is to change the value (with a different button click) with a method I have that returns a new number (i.e. currentNumber = methodCall();).

How is this done?

Answer 1

just do this

@Override
public void onClick(View v) {
    switch (v.getId()) {
    case R.id.num_confirmation:
        //do nothing in your current scenario 
        break;
    case R.id.change_num:
        myTextView.setText("Current Number: " + String.valueOf(currentNum+5)); 
        break;


    default:
        break;
    }