Question

It’s possible to load an image from resources passing to R.drawable a String?

I’m trying this:

public static Bitmap LoadBitmap(Context context, String filename)
{
     Bitmap image;
     image = BitmapFactory.decodeResource(context.getResources(), R.drawable.filename);
     return image;
}

Throws the following error:

filename cannot be resolved or is not a field

I’m trying to create the field in the R file creatic a constant but throws the following line:

R.java was modified manually! Reverting to generated version!

I’ll appreciate your help or suggestions. Thanks

Answer 1

Resources can be accessed as raw data: use AssetManager.open(..). Just pass the filename of wanted bitmap (e.g. “drawable/myimage.png”).

Then you can use BitmapFactory.decodeStream(..) to create a Bitmap from the data stream.

Update:

public static Bitmap LoadBitmap(Context context, String filename){
    AssetManager assets = context.getResources().getAssets();
    InputStream buf = new BufferedInputStream((assets.open("drawable/myimage.png")));
    Bitmap bitmap = BitmapFactory.decodeStream(buf);
    // Drawable d = new BitmapDrawable(bitmap);
    return bitmap;
}