Display given arraylist, with click on given button

Question

Hello, My xml has several buttons as I do so that when I click a certain button press an arraylist in listview

example

Botão1 clicado -> arraylist<Perguntas> carrega na listview1
Botão2 clicado -> arraylist<Respostas> carrega na listview1
Botão3 clicado -> arraylist<Nulas> carrega na listview1

always using msm listview, I am currently doing this with various activitys created one for each button I think this is not a good practice.

Answer 1

Simply change your Listview Adapter. For example:

botao1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
             mudaLista(listaDePerguntas);

    });
botao2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
             mudaLista(listaDeRespostas);

    });

Now in your Activity, create the method that changes the list

private void mudaLista(List<Texto> lista){
    listView.setAdapter(new ArrayAdapter<Texto>(this,  R.layout.support_simple_spinner_dropdown_item, lista));
}

It’s important to remember two things:

1) The Questions, Answers and Nulls classes have to be daughters of the Text class. If, in your code, they already have a father, use it instead of Text.

2)Your Listview has to be a field of your class, i.e., it has to be declared out of methods, and initialized in onCreate