Question

How to convert double to a string value that I get from the spinner, for example: “10 (ton).”

In summary:
How to convert string to double and delete the part (ton)?

I need only the value 10

Answer 1

Another option is using Java’s substring method in the String class.

The signature is:

substring(int beginIndex, int endIndex)

Where endIndex equals to the index of the last character you want to include + 1.

In the case of your example, it will look like this:

String myString = "10 (ton)";
Double dbl = Double.parseDouble(myString.substring(0, 2));

Here is the link to the method:
Java substring