ProgressDialog 

//progressDialog start

ProgressDialog progressDialog;
progressDialog = new ProgressDialog(this);
progressDialog.setTitle("লোড হচ্ছে...");
progressDialog.setMessage("অনুগ্রহ করে অপেক্ষা করুন");
progressDialog.show();

new Handler().postDelayed(new Runnable() {
    @Override
    public void run() {
        progressDialog.dismiss();
    }
},2000);

//progressDialog end