Android: Got sound in emulator but not on the phone - don't laugh :)

It took me a few hours to solve this problem. I didn't have any success to find the solution on the internet. Turns out, I had the "Media volume" turned off.

So if you have sound on the emulator, but not on the phone, try this:

Go to Settings->Sound->Volume and check that "Media volume" is not muted.

And also make sure that you use the .ogg file format (many on the forums wrote that they have problems with wav and mp3 files).

So that's it. I hope I saved a bit of your time.

How to flip Texture2D vertically or horizontally in XNA

Here is the code how you can flip a Texture2D image in XNA (4.0).

public static Texture2D Flip(Texture2D source, bool vertical, bool horizontal)
{
    Texture2D flipped = new Texture2D(source.GraphicsDevice, source.Width, source.Height);
    Color[] data = new Color[source.Width * source.Height];
    Color[] flippedData = new Color[data.Length];

    source.GetData(data);

    for (int x = 0; x < source.Width; x++)
        for (int y = 0; y < source.Height; y++)
        {
            int idx = (horizontal ? source.Width - 1 - x : x) +((vertical ? source.Height - 1 - y : y) * source.Width);
            flippedData[x + y * source.Width] = data[idx];
        }

        flipped.SetData(flippedData);

        return flipped;
}

Crop Texture2D in XNA

I needed to crop an image in XNA, but I didn't find a solution (Ok i really didn't search much :) ) and so I had to do it by myself. Here is the code in case you need it too. (XNA 4.0)

public static Texture2D Crop(Texture2D source, Rectangle area)
{
    if (source == null)
        return null;

    Texture2D cropped = new Texture2D(source.GraphicsDevice, area.Width, area.Height);
    Color[] data = new Color[source.Width * source.Height];
    Color[] cropData = new Color[cropped.Width * cropped.Height];

    source.GetData(data);

    int index = 0;
    for (int y = area.Y; y < area.Y + area.Height; y++)
    {
        for (int x = area.X; x < area.X + area.Width; x++)
        {
            cropData[index] = data[x + (y * source.Width)];
            index++;
        }
    }

    cropped.SetData(cropData);

    return cropped;
}