Why does my activity crash when I try to get a number?

I have an activity, called AddItem, which contains a couple fields that the user fills out and I am now trying to pass them to another activity. I was able to get the first two fields by doing this:

String messageText = ((EditText) findViewById(R.id.inputName)).getText().toString();
String discriptionText = ((EditText) findViewById(R.id.description)).getText().toString();

The above code worked fun, but then I tried to get another value which I then cast to a double like so:

double Latitude = Double.parseDouble(((EditText) findViewById(R.id.Latitude)).getText().toString());

It's kind of long and complicated but I'm basically doing the same thing with the exception of parsing the String and converting it to a double value. I determined that this is the problem code because when I comment it out the rest of the app runs fine.

Here is my Activity:

public class AddItem extends AppCompatActivity {

  EditText inputedTask, inputedDescription, inputedLatitude;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_add_item);
    inputedTask = (EditText) findViewById(R.id.inputName);
    inputedDescription = (EditText) findViewById(R.id.description);
    inputedLatitude = (EditText) findViewById(R.id.Latitude);
  }

  public void onSaveItemButton(View view) {
    String messageText = ((EditText) findViewById(R.id.inputName)).getText().toString();
    String discriptionText = ((EditText) findViewById(R.id.description)).getText().toString();
    double Latitude = Double.parseDouble(((EditText) findViewById(R.id.Latitude)).getText().toString());

    if (messageText.equals(""));
    else {
      Intent intent = new Intent();
      intent.putExtra(Intent_Constant.INTENT_MESSAGE_FIELD, messageText);
      setResult(Intent_Constant.INTENT_RESULT_CODE, intent);
      finish();
    }
  }
}