[Solved] Android: Division and subtraction always equal 1.0

by


You are reading the value from display1 twice, you forgot to change the reading of number2 to display2.

Replace:

number2 = Double.valueOf(display1.getText().toString());

with

number2 = Double.valueOf(display2.getText().toString());

Your function would end up being:

if(minu){
    number1 = Double.valueOf(display1.getText().toString());
    number2 = Double.valueOf(display2.getText().toString());

    display1.setText("");
    display2.setText("");
    displaySymbol.setText("");

    answer = number1 - number2;

    display1.setText(Double.toString(answer));
}

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solved Android: Division and subtraction always equal 1.0