Question

I have the following problem:

    String explosion_type = this.prefs.getString("explosion_type", "ring_explosion");

    BitmapFactory.Options optionsExplosion = new BitmapFactory.Options();
    optionsExplosion.inPurgeable = true;
    this._explosionSprite = BitmapFactory.decodeResource(_context.getResources(), 
com.forwardapps.liveitems.R.drawable.explosion, optionsExplosion);

I’m trying to use a String in place of the resource name, that way I can hotswap resources in the preference menu. This method causes the app to crash.

What is the proper way of implementing a situation like this? (Without making it too complicated or using if statements)

Answer 1

Use method getIdentifier on Resources object to fetch id of a drawable:

String explosion_type = this.prefs.getString("explosion_type", "ring_explosion");
    Log.i("imagename", explosion_type);
    BitmapFactory.Options optionsExplosion = new BitmapFactory.Options();
    optionsExplosion.inPurgeable = true;

     int imageResource = getResources().getIdentifier(explosion_type, "drawable", getPackageName());

        this._explosionSprite = BitmapFactory.decodeResource(_context.getResources(), imageResource, optionsExplosion);