Send message via whatsapp programmatically

Question

I'm trying to send messages via Whatsapp programmatically, the code works except the user needs to click the send button. I need the app to do everything (all user interactions). One way to do to it as follows .

Go to Menu Button > Settings > Chats. and check the "Enter is send option"

Here's the code I'm using:

protected void sendwts(){     String smsNumber = "2126123456789"; // E164 format without '+' sign     Intent sendIntent = new Intent(Intent.ACTION_SEND);     //  Intent sendIntent = new Intent(Intent.ACTION_SENDTO);     sendIntent.setType("text/plain");     sendIntent.putExtra(Intent.EXTRA_TEXT, "test \n");     sendIntent.putExtra("jid", smsNumber + "@s.whatsapp.net"); //phone number without "+" prefix     sendIntent.setPackage("com.whatsapp");      startActivity(sendIntent); } 

Thank you