// String smsNumber = "9212197079"; //without '+'
        try {
            Intent sendIntent = new Intent();//"android.intent.action.MAIN");
            //sendIntent.setComponent(new ComponentName("com.whatsapp", "com.whatsapp.Conversation"));
            sendIntent.setAction(Intent.ACTION_SEND);
            sendIntent.setType("text/plain");
            sendIntent.putExtra(Intent.EXTRA_TEXT, arrStr1);
                          // sendIntent.putStringArrayListExtra(Intent.EXTRA_TEXT,finalList);

           // sendIntent.putExtra("jid", smsNumber + "@s.whatsapp.net"); //phone number without "+" prefix
            sendIntent.setPackage("com.whatsapp");
            startActivity(sendIntent);
        } catch(Exception e) {
            Toast.makeText(this, "Error/n" + e.toString(), Toast.LENGTH_SHORT).show();
        }