Send message to specific contact through whatsapp from another app

Question

Is it possible to send message to a specific contact through whatsapp directly from another app? I know the contact ID. I don\'t want to open whatsapp

Answer 1

This will be work but you need to mobile no. with country code like for India 91. eg. 91758XXXXXX2

String url = "https://api.whatsapp.com/send?phone=" + 91758XXXXXX2 + "&text=" + URLEncoder.encode("good morning", "UTF-8");
    i.setPackage("com.whatsapp");
    i.setData(Uri.parse(url));
    if (i.resolveActivity(packageManager) != null) {
      startActivity(i);
    }