Android serializable problem

Question

I created a class, which has several member variables, all of which are serializable... except one Bitmap! I tried to extend bitmap and implement serializable, not thinking

Answer 1

Here is a general bitmap wrapper: (Edit from Barry Fruitman answer)

    public class SerialBitmap implements Serializable {

    private Bitmap bitmap;
    private transient Bitmap.CompressFormat compressFormat = Bitmap.CompressFormat.PNG;
    private transient int compressQuality = 100;

    public SerialBitmap(Bitmap bitmap)
    {
        this.bitmap = bitmap;
    }

    public Bitmap getBitmap() {
        return bitmap;
    }

    public void recycle() {
        if (bitmap!=null && !bitmap.isRecycled()) bitmap.recycle();
    }
    private void writeObject(java.io.ObjectOutputStream out) throws IOException {

        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(compressFormat, compressQuality, 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);

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

    }

    public Bitmap.CompressFormat getCompressFormat() {
        return compressFormat;
    }

    public void setCompressFormat(Bitmap.CompressFormat compressFormat) {
        this.compressFormat = compressFormat;
    }

    public int getCompressQuality() {
        return compressQuality;
    }

    public void setCompressQuality(int compressQuality) {
        this.compressQuality = compressQuality;
    }
}

if you want to compress the bitmap and make the serial object smaller you can set the compression via setCompressFormat and setCompressQuality.

Example:

setCompressFormat(Bitmap.CompressFormat.JPEG);
setCompressQuality(80);

If you are using Progourd, add the following rules:

-keepnames class * implements java.io.Serializable
-keepclassmembers class * implements java.io.Serializable {
    static final long serialVersionUID;
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    !static !transient ;
    private void writeObject(java.io.ObjectOutputStream);
    private void readObject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}