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!

Answer 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));