Serializing and De-Serializing android.graphics.Bitmap in Java

Question

I have started work on an my first android application and have the basis of an application that handles an image with multiple layers. I am able to export a flat version of

Answer 1

Here is an example of a serializable object that can wrap bitmaps.

public class BitmapDataObject implements Serializable {

    private Bitmap currentImage;

    public BitmapDataObject(Bitmap bitmap)
    {
        currentImage = bitmap;
    }

    private void writeObject(java.io.ObjectOutputStream out) throws IOException {

        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        currentImage.compress(Bitmap.CompressFormat.PNG, 100, stream);

        byte[] byteArray = stream.toByteArray();

        out.writeInt(byteArray.length);
        out.write(byteArray);

    }

    private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {


        int bufferLength = in.readInt();

        byte[] byteArray = new byte[bufferLength];

        int pos = 0;
        do {
            int read = in.read(byteArray, pos, bufferLength - pos);

            if (read != -1) {
                pos += read;
            } else {
                break;
            }

        } while (pos < bufferLength);

        currentImage = BitmapFactory.decodeByteArray(byteArray, 0, bufferLength);

    }
}