Get the int number from TextView decrease by one and set new text

Question

I have a TextView with text number 50. I need to get this value, decrease it by 1 (49 the result) and set the new value on my Textview.

My code so far:

TextView mynumber;

mynumber = (TextView) findViewById(R.id.mynumber);
String coinstext = mynumber.getText().toString();
                mynumber.setText(coinstext -1);

Completely failure... any idea please?

What you get from textview is a string, you need to convert it to int or numeric types before doing any arithmetic operations. Look at http://stackoverflow.com/q/2709253/1155650 — Rohit Vipin Mathews, Jan 18 '17 at 00:25

score 0 · Accepted Answer · edited Jan 18 '17 at 00:27

0

int x = Integer.parseInt(mynumber.getText().toString());
x = x - 1;
mynumber.setText(Integer.toString(x));

edited Jan 18 '17 at 00:27

Rohit Vipin Mathews

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answered Jan 18 '17 at 00:12

Irene Lorkos

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Get the int number from TextView decrease by one and set new text

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