I have a little doubt on Android. Suppose I have an EditText, in which the user will enter a number by keyboard. How can I collect that value? Let's see, I'll do it as if it were a text string, which would be where I do this:
private EditText et1;
et1 = (EditText)findviewbyid(R.id.et1);
String texto = et1.getText().toString();
But do not do it if instead of text was a number, for example a number referring to age. How would that value be collected? Thanks and best regards!
You can use this to convert it to integer or double (see below):
String texto = et1.getText().toString();
For a whole number, any of these 2 forms:
int numero = Integer.parseInt(texto);
int numero = Integer.parseInt(et1.getText().toString());
For decimals:
double decimal = Double.parseDouble(et1.getText().toString());
double decimal = Double.parseDouble(texto);
You can add .trim() to skip spaces in
white that could be before or after the number entered:
int numero = Integer.parseInt(et1.getText().toString().trim());
Everything you pick up will come as a String, what you should do is make a parse, for example:
Int edad = Integer.parse(et1.getText().toString())
I recommend that you take some safety measures when pairing:
String sEdad = et1.getText().toString();
Int iEdad = 0;
if("" != sEdad) iEdad = Integer.parse(sEdad);
With this you avoid a conversion error in case the parse method is called and the String is empty
If it's a number it's the same procedure, actually the method getText () returns the text that is displayed by TextView .
Therefore it is indifferent if it is a String or a number.
But if you want to get the value numerico , then you have to convert it, you can use for this Integer.parse() :
Int valor = Integer.parse(et1.getText().toString())
As a best practice, use the trim() method to avoid possible spaces in the content of your EditText :
Int valor = Integer.parse(et1.getText().toString().trim())