How to alter color value of a pixel in a bitmap Image and then extract it?

Question

How can I change and access the color value that is stored in a specific position of an image?

I tried to save an image with the pixel at coordinates (10, 10) changed. I altered the red color value to the value 65 to represent the ASCII character A. But when I tried to extract the value from position (10, 10), the pixel's red value was not equal to the expected value.

Here is my code to alter the image:

int pixelColor = bitmapImage.getPixel(10, 10);

int pixelAlpha = Color.alpha(pixelColor);
int red = 65; // represents character A
int green = Color.green(pixelColor);
int blue = Color.blue(pixelColor);

int new_pixel = Color.argb(pixelAlpha, red, green, blue);

bitmapImage.setPixel(10, 10, new_pixel);   

And here is my code to extract the value:

String data = "";
int pixelColor = bitmapImage.getPixel(10, 10);
int red = Color.red(pixelColor); 
data += (char)red;

Toast.makeText(this, "Data: " + data, 20).show();

So how can I extract the specified value? I want to replace the red color value with an ASCII character. Am I implementing the (LSB) algorithm correctly?

Here is my complete program:

public void saveImage(Bitmap bitmapImage, String name) throws IOException
{
    ByteArrayOutputStream bytes = new ByteArrayOutputStream();
    bitmapImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);

    String fName = "/mnt/sdcard/pictures/" + name + ".jpg";
    File f = new File(fName);
    f.createNewFile();

    FileOutputStream fo = new FileOutputStream(f);
    fo.write(bytes.toByteArray());
    fo.flush();
    fo.close();
}

private Bitmap HideMessage(Bitmap src)
{
    Bitmap dest = Bitmap.createBitmap(src.getWidth(), src.getHeight(), src.getConfig());

    for(int x = 0; x < src.getWidth(); x++)
    {
        for(int y = 0; y < src.getHeight(); y++)
        {
            dest.setPixel(x, y, src.getPixel(x, y));
        }
    }

    int pixelColor = src.getPixel(10, 10);

    int pixelAlpha = Color.alpha(pixelColor);
    int red = 65; // represent character A
    int green = Color.green(pixelColor);
    int blue = Color.blue(pixelColor);

    int new_pixel = Color.argb(pixelAlpha, red, green, blue);

    dest.setPixel(10, 10, new_pixel);            

    return dest;
}

public void Hide()
{    
    Bitmap dest = HideMessage(image);

    try 
    {
        saveImage(dest, "hidden");
        Toast.makeText(this, "Message Hidden in Image and saved", Toast.LENGTH_LONG).show();
    } 
    catch (IOException e) 
    {
        Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
    }
}

public void Show_character()
{
    Bitmap dest = BitmapFactory.decodeFile("/mnt/sdcard/pictures/hidden.jpg");

    String data = "";
    int pixelColor = dest.getPixel(10,10);
    int red = Color.red(pixelColor); 
    data += (char)red;

    Toast.makeText(this, "Data: " + data, 20).show();  
}