我可以从我的Java（或任何语言）应用程序发送WhatsApp消息吗？

Question

We can send emails or SMS through our application written in Java or many languages. Is there any mechanism to send WhatsApp messages through our applications / web site?

Answer 1

With this code you can open the whatsapp chat with the given number.

void openWhatsappContact(String number) {
Uri uri = Uri.parse("smsto:" + number);
Intent i = new Intent(Intent.ACTION_SENDTO, uri);
i.setPackage("com.whatsapp");  
startActivity(Intent.createChooser(i, ""));
}