ArrayIndexOutOfBoundsException with sprite sheet

Question

I keep getting this error with andengine when using a sprite sheet.

Can anyone explain what i means?

08-30 13:31:50.053: E/AndroidRuntime(9643): java.lang.ArrayIndexOutOfBoundsException: length=12; index=12

here is where the error is occuring at.

    pItem.setCurrentTileIndex(MathUtils.random(0, pItem.getTileCount()));

Answer 1

try: pItem.setCurrentTileIndex(MathUtils.random(0, pItem.getTileCount()-1));

getTileCount() likely returns the # of tiles, so indexes would be that minus 1.

Answer 2

我的猜测是MathUtils.random是包容性的，这意味着在你的例子中（大小为12的数组），它将生成一个从0到12的数字， 包括 12.尝试将代码更改为：

pItem.setCurrentTileIndex(MathUtils.random(0, pItem.getTileCount() - 1));