Change background color when Listview has no items

Question

Is there any way to customize a listView besides the textView default? The screen is empty obviously, but would like to change the background color only when searching not to display the results.

 mEstadoVazioTextView = (TextView) findViewById(R.id.visualizacaoVazia);
        listview.setEmptyView(mEstadoVazioTextView);

 mEstadoVazioTextView.setText("Nenhum livro encontrado!\n\nFavor verificar ortografia ou" +
                    " informar algum dado sobre o livro novamente.");

Answer 1

Hi, look I’m new to development, but I hope I can help.

From what I understand you have a Listview that is being populated with a list of Books, what you want is if the search does not return result that is displayed a message to the user.

I’ve done it in a few different ways.

1) Instead of putting the message in Listview, you could take the list size and if this list has size 0 (with no result listed) you can put this message in Layout (not in Listview).

int tamanho = Lista.size();
if(tamanho == 0){
    Texto.SetText("Livro não encontrado")
}

2) Now if you really want to customize the List, I advise you to use a Recyclerview because you will have more freedom in customization. Research on this that will certainly help.

3) You can still put a Toast informing the user that there is no result in the search.

I hope I’ve helped.

Answer 2

Before making the list available to Adapter check that it is empty and change the background of Listview accordingly.

Anything like that:

if(lista.size() == 0){
    listview.setBackgroundColor(Color.RED)
else{
    listview.setBackgroundColor(Color.WHITE)
}

Edit after the comment

I am using Loader, the loading of the list is outside onCreate, as reference the variable in this case?

Declare the variable to store Listview as an Activity attribute.

private ListView listview;

In the method onLoadFinished() check if the cursor has results and change the background of Listview accordingly:

@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {

    if(cursor.getCount() == 0){
        listview.setBackgroundColor(Color.RED)
    else{
        listview.setBackgroundColor(Color.WHITE)
    }

    adapter.changeCursor(cursor);
}