Intent intent = new Intent(this, CaptureActivity.class);
intent.setAction(Intents.Scan.ACTION);
/*intent.putExtra(Intents.Scan.WIDTH, 400);
intent.putExtra(Intents.Scan.HEIGHT, 300);*/
startActivityForResult(intent, REQ_CAPTURE);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQ_CAPTURE) {
        if (resultCode == RESULT_OK) {
            String result = data.getStringExtra(Intents.Scan.RESULT);
            ParsedResultType type = ParsedResultType.values()[data.getIntExtra(
                    Intents.Scan.RESULT_TYPE, ParsedResultType.TEXT.ordinal())];
            String format = data.getStringExtra(Intents.Scan.RESULT_FORMAT);
            byte[] rawBytes = data.getByteArrayExtra(Intents.Scan.RESULT_BYTES);

            Bitmap bm = BitmapFactory.decodeByteArray(rawBytes, 0, rawBytes.length);
            // TODO
        }
    } else {
        super.onActivityResult(requestCode, resultCode, data);
    }
}

Intent intent = new Intent(Intents.Encode.ACTION);
intent.putExtra(Intents.Encode.FORMAT, BarcodeFormat.QR_CODE.toString());
/** Contents.Type comments for details */
intent.putExtra(Intents.Encode.TYPE, Contents.Type.TEXT);
intent.putExtra(Intents.Encode.DATA, text);
try {
    QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(this, intent, dimension, false);
    Bitmap bitmap = qrCodeEncoder.encodeAsBitmap();
    if (bitmap == null) {
        Log.w(TAG, "Could not encode barcode");
        Toast.makeText(this, R.string.msg_encode_contents_failed, Toast.LENGTH_SHORT)
                .show();
    } else {
        String title = qrCodeEncoder.getTitle();
        String contents = qrCodeEncoder.getContents();
        // TODO
    }
} catch (WriterException e) {
    e.printStackTrace();
}