Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = null;
try {
  uri = Uri.parse("alipays://platformapi/startapp?saId=10000007&qrcode=" + URLEncoder.encode("https://qr.alipay.com/bax04659wociie67ugya204a", "UTF-8”));
} catch (UnsupportedEncodingException e) {
  e.printStackTrace();
}
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setData(uri);
startActivity(intent);