EditText to int using Integer.parseInt

Question

I'm new to programming and Android. I'm making my best attempt at a simple app and I'm stuck!

I have two editTexts (set to accept numbers only) and a button. The idea is to display the sum of the two user inputs when the button is pressed. However, my app stops working and force closes when I click the button in the emulator.

Any help would be greatly appreciated.

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

    setContentView(R.layout.activity_prevailing_torque);
    Button calculatePrevailing = (Button) findViewById(R.id.button_calculatePrevailing);


    calculatePrevailing.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            TextView prevailingSetting = (TextView) findViewById(R.id.textViewSetting);
            EditText editTextPrevailing = (EditText) findViewById(R.id.editTextPrevailing);
            EditText editTextRecommended = (EditText) findViewById(R.id.editTextReccomended);

            int p = Integer.parseInt(editTextPrevailing.getText().toString());
            int r = Integer.parseInt(editTextRecommended.getText().toString());

            prevailingSetting.setText(r+p);
        }
    });
}

I've looked at several similar questions on here but I haven't been able to find anything that I can implement further than what I have already done. But I am probably looking in the wrong places. Thanks!

Welcome to SO! What error is it throwing in LogCat? Try: .setText(Integer.toString(r+p)) — Matt Clark
– Matt Clark, Commented Dec 5, 2012 at 16:30

Slickelito · Accepted Answer · 2012-12-06 07:37:48Z

1

You can't use setText() with an Integer since it expects a CharSequence, you have to use

prevailingSetting.setText(String.valueOf(r+p));

or just

prevailingSetting.setText(""+(r+p));

edited Dec 6, 2012 at 7:37

answered Dec 5, 2012 at 16:30

Slickelito

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2 Comments

Lisa Cox Sparks Parker Over a year ago

Thank you! The first bit works great. The second returns 10+20=1020.

Slickelito Over a year ago

yeah you actually have to do the math first, so it would be prevailingSetting.setText(""+(r+p));

viks · Accepted Answer · 2012-12-05 16:32:02Z

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_prevailing_torque);
   Button calculatePrevailing = (Button) findViewById(R.id.button_calculatePrevailing);
   TextView prevailingSetting = (TextView) findViewById(R.id.textViewSetting);
   EditText editTextPrevailing = (EditText) findViewById(R.id.editTextPrevailing);
   EditText editTextRecommended =(EditText)findViewById(R.id.editTextReccomended);

   calculatePrevailing.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {

        int p = Integer.parseInt(editTextPrevailing.getText().toString());
        int r = Integer.parseInt(editTextRecommended.getText().toString());
        int s = r+p;
        prevailingSetting.setText(Integer.toString(s));


    }
    });

Pir Fahim Shah · Accepted Answer · 2012-12-05 17:32:42Z

0

Ok ! if this is your problem then first of all convert your editText value to string and after that convert it into integer like !

 String str1=editTextPrevailing.getText().toString();
 String str2=editTextRecommended.getText().toString();
 int p = Integer.parseInt(str1);
  int r = Integer.parseInt(str2);
  int s = r+p;
   prevailingSetting.setText(""+s);

answered Dec 5, 2012 at 17:32

Pir Fahim Shah

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