Question

Alright so I am fairly new to android app development. I guess you could also say coding in general. I am only familiar with Visual Basic and some HTML/CSS. I am using eclipse and developing in android 1.5

EditText costofmeal, tippercent;
TextView tiptotal;
Button calctipbtn;
BigDecimal costNum, percentNum;



/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    calctipbtn = (Button) findViewById(R.id.calctipbtn);

    costofmeal = (EditText) findViewById(R.id.CostofMeal); 
    tippercent = (EditText) findViewById(R.id.PercentTipText);

    tiptotal = (TextView) findViewById(R.id.tiptotal);

    calctipbtn.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            costNum = new BigDecimal(costofmeal.getText().toString());
            percentNum = new BigDecimal(tippercent.getText().toString());
            tiptotal.setText(costofmeal.multiply(tippercent).toString());



        }
    });









}

What I want to do is to have tiptotal represent costofmeal * tippercent after calctipbtn is pushed. I have looked at tutorials and other things I just cant seem to get it to work the only error I am getting right now is

The Method muliply(EditText) is undefined for the type EditText

any help sorry if this has been asked before I looked around and couldn’t find something that I understood maybe it had been asked before but I only saw examples that dealt with when they declared and integer and put the variables in. Just not sure how to do it in this case.

thanks

Answer 1

I think you just use the wrong variables :

tiptotal.setText(costNum.multiply(percentNum).toString());

costNum and percentNum are the are Number while costofmeal and tippercent are texts, so you can’t multiply them.