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

Please try this,

public void onClickWhatsApp(View view) {

Intent waIntent = new Intent(Intent.ACTION_SEND);
waIntent.setType("text/plain");
        String text = "YOUR TEXT HERE";
waIntent.setPackage("com.whatsapp");
if (waIntent != null) {
    waIntent.putExtra(Intent.EXTRA_TEXT, text);//
    startActivity(Intent.createChooser(waIntent, "Share with"));
} else {
    Toast.makeText(this, "WhatsApp not Installed", Toast.LENGTH_SHORT)
            .show();
}
}

Source : Please check this answer for further details