final String admin_id = textInputEditTextAdminID.getText().toString();
    final String myPin = textInputEditTextPin.getText().toString();

    //displays the progressDialog with a title when logging admin in
    progressDialog = ProgressDialog.show(AdminLoginActivity.this, "Logging In...", null, true, true);
    progressDialog.setMessage("Please wait");


    adminRef.child(admin_id).addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            if (dataSnapshot.exists()) {
                Admin admin = dataSnapshot.getValue(Admin.class);
                if (myPin.equals(admin.getPin())) {
                    final Timer timer = new Timer();
                    timer.schedule(new TimerTask() {
                        public void run() {
                            progressDialog.dismiss();    //dismisses the alertDialog
                            timer.cancel();     //this will cancel the timer of the system
                        }
                    }, 5000);   // the timer will count 5 seconds....
                    clearTextFields();
                    Toast.makeText(AdminLoginActivity.this, "You have Successfully Logged In...", Toast.LENGTH_LONG).show();
                   // Admin admin = new Admin();
                    //Intent intentPanel = new Intent(AdminLoginActivity.this, AdminPanel.class);
                    //startActivity(intentPanel);

                        Intent intent_manageAdminAccount = new Intent(AdminLoginActivity.this, ManageAccount.class);
                        intent_manageAdminAccount.putExtra("admin_id", admin.getAdmin_id());
                        intent_manageAdminAccount.putExtra("pin", admin.getPin());
                        intent_manageAdminAccount.putExtra("key", admin.getAdmin_id());
                        startActivity(intent_manageAdminAccount);

                    /*if(intent_manageAdminAccunt.hasExtra("admin_id")
                            && intent_manageAdminAccunt.hasExtra("pin")
                            && intent_manageAdminAccunt.hasExtra("key"))
                    {
                        Intent intentPanel = new Intent(AdminLoginActivity.this, AdminPanel.class);
                        startActivity(intentPanel);
                    }*/


                   // AdminLoginActivity.this.finish();

                    Intent intentPanel = new Intent(AdminLoginActivity.this, AdminPanel.class);
                    startActivity(intentPanel);
                   // AdminLoginActivity.this.finish();

                }
                else {
                    final Timer timer = new Timer();
                    timer.schedule(new TimerTask() {
                        public void run() {
                            progressDialog.dismiss();    //dismisses the alertDialog
                            timer.cancel();     //this will cancel the timer of the system
                        }
                    }, 3000);   // the timer will count 3 seconds....
                    clearTextFields();
                    Toast.makeText(AdminLoginActivity.this, "Incorrect Admin ID or Pin...", Toast.LENGTH_LONG).show();
                }

            } else {
                final Timer timer = new Timer();
                timer.schedule(new TimerTask() {
                    public void run() {
                        progressDialog.dismiss();    //dismisses the alertDialog
                        timer.cancel();     //this will cancel the timer of the system
                    }
                }, 3000);   // the timer will count 3 seconds....
                clearTextFields();
                Toast.makeText(AdminLoginActivity.this, "Admin does not exist in database!!", Toast.LENGTH_LONG).show();
            }

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            Toast.makeText(AdminLoginActivity.this, databaseError.toException().toString(), Toast.LENGTH_LONG).show();
        }
    });

}