Return message if no checkbox is selected

Question

Return message if no checkbox is selected

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#1 by (1 votes)
#2 by (0 votes)

0

How do I make the treatment in this code so that it returns a message to the user to select at least one checkbox if he does not select any?

    public void verificaCheckBox(){

    Listcheck.clear();

    if (cbPapel.isChecked())
        Listcheck.add(cbPapel.getText().toString());

    if (cbPlastico.isChecked())
        Listcheck.add(cbPlastico.getText().toString());

    if (cbMetal.isChecked())
        Listcheck.add(cbMetal.getText().toString());

    if (cbVidro.isChecked())
        Listcheck.add(cbVidro.getText().toString());


        cbSelecionado = (Listcheck.toString());

}

java android

asked by anonymous 20.04.2018 / 17:02

2 answers

0

if (cbPapel.isChecked())
   Listcheck.add(cbPapel.getText().toString());

if (cbPlastico.isChecked())
   Listcheck.add(cbPlastico.getText().toString());

if (cbMetal.isChecked())
   Listcheck.add(cbMetal.getText().toString());

if (cbVidro.isChecked())
   Listcheck.add(cbVidro.getText().toString());

if (Listcheck.isEmpty()){
   //Msg que não foi selecionado nenhum
}

20.04.2018 / 17:10

How to use ORDER BY of a data that does not come from the Bank? Flask: Stream radio

score 1 · Accepted Answer

Another way would be to test the size of your Listcheck list (assuming that your list is a Collection ) after passing its if of addition.

public void verificaCheckBox(){

  Listcheck.clear();

  if (cbPapel.isChecked())
    Listcheck.add(cbPapel.getText().toString());

  if (cbPlastico.isChecked())
    Listcheck.add(cbPlastico.getText().toString());

  if (cbMetal.isChecked())
    Listcheck.add(cbMetal.getText().toString());

  if (cbVidro.isChecked())
    Listcheck.add(cbVidro.getText().toString());

  if(Listcheck.size() > 0){
    cbSelecionado = (Listcheck.toString());
  }else{
    //nenhum checkbox selecionado
  }

}