Android Question Invalid double:""

[Yves Mazzon]

In my application when run on my Samsung S4 I get this message: "An error has occurred in sub:main_calculation(java line:523) Java.lang. numberFormatExeption: Invalid double:"". "

I am at lost here. I know that I have a sub that is called Calculation but reading my code again and again can't find what is triggering the error.

My question is what shall I look for: Basically in my Calculation sub, numerical values are transferred to declared variables and then some math are performed. Many thanks
Yves

 

[LucaMs]

Anywhere Software, can I answer so each time a question is not specified enough?

 

[Roycefer]

This is most likely caused by your app trying to parse user input into a numerical variable (like a Double) but that input not being numerical in nature. Look at how your app validates user input.

 

[wonder]

Can you post the Calculation sub? It seems that a String is being fed into a Double variable.

 

[Yves Mazzon]

Hi, I fond where the error came from. I got that error if the string is empty in the labels where the numerical values has to be entered. So I put some condition to avoid this error by putting some guards in the program. Many thanks.

 

[Erel]

IsNumber can be useful for such cases:

If IsNumber(EditText1.Text) Then x = EditText1.Text + 10

 

[Yves Mazzon]

IsNumber can be useful for such cases:

If IsNumber(EditText1.Text) Then x = EditText1.Text + 10

Thanks Erel