Define background LinearLayout from variable String

Question

Define background LinearLayout from variable String

I have a function that takes a number (in String format) as a parameter and checks if it is between the numbers from 1 to 5. Here is the function:

if (fundo.equals("1") || fundo.equals("2") || fundo.equals("3") || fundo.equals("4") || fundo.equals("5"))
{
    fundo = "bg_" + fundo;
    fundoTopo.setBackground(R.drawable. <-- Queria colocar a variavel aqui);
}

But this generates an error as the received format is String, and the required format is Drawable, how to solve this?

1

android background drawable

Author: ramaral, 2016-03-30

Source

1 answers

score 2 · Accepted Answer

You can get the id from a drawable like this:

int id = context.getResources()
                .getIdentifier(fundo, "drawable", context.getPackageName());

Obtained or id use setBackgroundResource():

fundoTopo.setBackgroundResource(id);

Everything together will be like this:

if (fundo.equals("1") || fundo.equals("2") || fundo.equals("3") || fundo.equals("4") || fundo.equals("5"))
{
    fundo = "bg_" + fundo;
    int id = context.getResources()
                    .getIdentifier(fundo, "drawable", context.getPackageName()); 
    fundoTopo.setBackgroundResource(id);
}