Prevent negative numbers in Textview android - Code

Question

Is it possible to stop getting negative numbers in TextView in android by writing a code in java.

I tried this

int up = 0;
TextView textview;

        if (allowNagativeNumbers == false) {
            if ( up < 0 ) 
            {
                up = 0;
                textview.setText(0);
            }
        }

but it still allows negative numbers. I am not sure if this code is right but by this code I mean everytime the value for up / text in textview is less then 0 e.g. -1 then change the value of up to 0 and make the textview text 0.

Basically, in my app there is a button and if that button is pressed the textview will stop doing negative numbers but if that button is not pressed then it will do negative numbers along with positives. — user4358262
– user4358262, Commented Dec 15, 2014 at 11:55
Impossible to help you without a good code sample illustrating your problem. — wvdz
– wvdz, Commented Dec 15, 2014 at 11:57

upenpat · Accepted Answer · 2014-12-15 12:00:03Z

1

Before displaying your number in TextView use Math.abs() function on your number.This function will give you absolute value.

answered Dec 15, 2014 at 12:00

upenpat

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Comments

John McElreavey · Accepted Answer · 2014-12-15 12:00:53Z

0

I'm guessing you want this to happen in real-time? Are you using a listener for the textview? If so make sure this is inside a listener and also double check and make sure that allowNegativeNumbers is actually false.

answered Dec 15, 2014 at 12:00

John McElreavey

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Kelevandos · Accepted Answer · 2014-12-15 12:02:11Z

0

Implement your own TextView class (you will also be able to use it in XML files).

public class MyTextView extends TextView {

    @Override
    public void setText (CharSequence text, BufferType type)
    {
        if(Integer.valueOf(text) > 0)
        {
            super.setText (text, type);
        }
        else
        {
            super.setText ("0", type);
        }

}

answered Dec 15, 2014 at 12:02

Kelevandos

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Comments

Umesh Kumar Saraswat · Accepted Answer · 2014-12-15 12:07:32Z

0

Try These statements

int up = 5;
up = up >0 ? up: 0;

and set the text in textView.

another way

get the text from textView and convert it into string.

int up = Integet.parseInt(textView.getText());
up = up >0 ? up: 0;
and set the text in textView.

answered Dec 15, 2014 at 12:07

Umesh Kumar Saraswat

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