Android: How to send message programmatically by using WhatsApp, WeChat?

Question

How to use messaging in android application by using WhatsApp and WeChat?

Actually requirement is to send sms using WhatsApp and We

Answer 1

This should help to send message using whatsapp:

public void sendWhatsAppMsg() {

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

}