getTexture(texture);

//if you set the image of something to getTexture("redstone_sword"), it will have the texture of a Redstone Sword
function getTexture(texture){
if(texture=="redstone_sword"){
return android.graphics.BitmapFactory.decodeStream(ModPE.openInputStreamFromTexturePack("images/items-opaque/redstone_sword_0.png"));
}
}