Question

I am trying to parse a double from an edittext but i keep getting a number format exception error.

i initially tried this…

premiumvalue = Double.parseDouble(premium.getText().toString());         
amountweightvalue = Double.parseDouble(amountweight.getText().toString());

Then attempted this…to no avail.

try{
    premiumvalue = Double.parseDouble(premium.getText().toString());
} catch (final NumberFormatException e) {
    premiumvalue = 0;
}
try{
    amountweightvalue = Double.parseDouble(amountweight.getText().toString());
} catch (final NumberFormatException e) {
    premiumvalue = 0;
}

I’m a noob and any help fixing this would be greatly appreciated.

Answer 1

I have test your code test your code myself and find the following possibility to find NumberFormatException:

1. if EditText value is blank, So apply condition for EditText blank value.
2. if EditText value is only dot(.), So apply condition for EditText dot value.

in your comment you are saying that you are using this

String text = premium.getText().toString();

if(text.equals(".")||text.equals("-.")||text.equals(""))
 { 
    premium.setText("0");
 }

so my point is that

1. are you using same thing for both premium and amountweight EditText and then parse string to double??
2. and why you need to check condition for ‘_’ because if you set android:inputType="numberDecimal" attribute for EditText then EditText only accept 0-9 and . value.
3. you don’t need to trim EditText value bacuse Edittext do not accept blank space if you are using android:inputType="numberDecimal" attribute.
4. don’t need to check null condition because EditText never return null value.

I have test your code lot of way and do not find NumberFormatException if i follow above points.