java.lang.NullPointerException：无法为child（）Radio Buttom set

Question

尝试在Firebase上进行更新时遇到错误，并且我不知道是否是因为未设置我的radioButtons。错误如下所示：

java.lang.NullPointerException: Can't pass null for argument 'pathString' in child() Radio Buttom set

我需要更新请求的状态，但我不知道此错误是什么，也不知道该怎么办，以下是我编写的代码：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_pop);

    //inicializar Componentes
    status = findViewById(R.id.RadioGroupStatus);
    alterarStatus = findViewById(R.id.buttonAlterarStatus);




    DisplayMetrics dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);

    int width = dm.widthPixels;
    int height = dm.heightPixels;

    getWindow().setLayout((int)(width*.8), (int) (height*.7));


    WindowManager.LayoutParams params = getWindow().getAttributes();
    params.gravity = Gravity.CENTER;
    params.x = 0;
    params.y = -20;

    getWindow().setAttributes(params);
    verificaRadioButton();


    alterarStatus.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           update(valoresPedido);

            Toast.makeText(PopActivity.this, " Status alterado com sucesso  ",
                    Toast.LENGTH_SHORT).show();
            finish();
        }
    });
}
public void verificaRadioButton(){
    status.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int i) {

            if (i == R.id.radioButtonConfirmado){
                Toast.makeText(PopActivity.this, " Status alterado para Confirmado  ",
                        Toast.LENGTH_SHORT).show();
                        update(valoresPedido);

            }
            if (i == R.id.radioButtonPreparo){
                Toast.makeText(PopActivity.this, " Status alterado para Em preparo  ",
                        Toast.LENGTH_SHORT).show();
                        update(valoresPedido);

            }
            if (i == R.id.radioButtonSaindoEntrega){
                Toast.makeText(PopActivity.this, " Status alterado para Saindo para Entrega  ",
                        Toast.LENGTH_SHORT).show();
                        update(valoresPedido);

            }
            if (i == R.id.radioButtonRecusado){
                Toast.makeText(PopActivity.this, " Status alterado para Recusado  ",
                        Toast.LENGTH_SHORT).show();
                        update(valoresPedido);

            }

        }
    });


}
public static void update(ValoresPedido v){
    Map<String,Object> valoresMap = new HashMap<String,Object>();
    valoresMap.put("statusPedido", v.getStatusPedido());

    FirebaseConfig.getFirebase()
            .child("Adega")
            .child("Pedidos")
            .child(pedido.getKey())
            .child("ValoresPedido")
            .updateChildren(valoresMap);


}


}