Storable.java

public void save(Context context) {
	Map<String, Object> mapRepr = asMap();
	Parcel p = Parcel.obtain();
	p.writeMap(mapRepr);
	p.setDataPosition(0);
	ContentValues values = ContentValues.CREATOR.createFromParcel(p);
	if (id == -1) {
		Uri insertUri = context.getContentResolver().insert(
				getPath(getClass()), values);
		id = Long.parseLong(insertUri.getLastPathSegment());
	} else {
		context.getContentResolver().update(getPath(getClass(), id),
				values, null, null);
	}
}

private Map<String, Object> asMap() {
	Map<String, Object> res = new HashMap<String, Object>();
	Field[] fields = SQLHelper.getFields(getClass());
	for (Field field : fields) {
		try {
			field.setAccessible(true);
			TypeHandler handler = TypeHandler.getHandler(field.getType());
			res.put(field.getName(), handler.getSQLValue(field.get(this)));
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
	}
	return res;
}