Question

I’m working on an app in which the user has the option to input a set of coordinates in two EditText views for Latitude and Longitude. The inputted coordinate/location will then be displayed on a map, which works great. However if the user inputs an invalid value the app crashes, and I need to prevent that.

The Latitudes/Longitudes value has to be for example 35.27, and the thing that makes the app crash is when there’s more then one dot “.” e.g. 33.23.43. How can i check if the inputted value only has ONE dot?

I don’t really have a lot of experience in this area, and I’m still new to android, so any help will be much appreciated.

Answer 1

I was going to suggest that you checked the length of the string that you get, but because 1.5 and 153.163 are both valid that doesn’t work. I advise you to use a `try/catch statement. For example

try{
    //do what ever you do with the numbers here
catch(Exception e){
//the user has inputted an invalid number deal with it here
}