Two dimensional Array w Bitmap throws error - Null object reference?

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#1

Hi all,

I’m having an issue trying to fill a two-dimensional array with bitmaps.

I declared it like this:

public var rewardList = new Array<Array<openfl.display.Bitmap>>();

Then filled it like this (inside a function):
public function loadRewards():Array<Array> {
rewardList[0][0] = new Bitmap(Assets.getBitmapData(“img/empty_box1.png”));
rewardList[0][1] = new Bitmap(Assets.getBitmapData(“img/reward3_blue.png”));
…etc…
rewardList[1][0] = new Bitmap(Assets.getBitmapData(“img/empty_box2.png”));
rewardList[1][1] = new Bitmap(Assets.getBitmapData(“img/reward2_green.png”));
…etc…

return rewardList;
}

The script compiles without errors now but the program crashes upon execution. Error is : Null Object Reference.
The output shows that the program gets stuck at loading the images into the array.

Is it somehow not allowed to fill a 2-d array with Bitmaps?
In case that is relevant: there are no ‘holes’; all of the 3x11 places are filled. As a 1D array with bitmaps everything works fine. Just when introducing the 2D element, things go wrong.

Any insight or help would be much appreciated!
Thanks!

#3

You may need:

rewardList[0] = [];
rewardList[0][0] = new Bitmap(Assets.getBitmapData(“img/empty_box1.png”));
rewardList[0][1] = new Bitmap(Assets.getBitmapData(“img/reward3_blue.png”));
...
#4

Thanks, that has worked!