尝试创建自定义警报对话框时出现空指针异常

Question

我制作了一个自定义提醒对话框：

final AlertDialog.Builder builder = new AlertDialog.Builder(this);
                final FrameLayout frameView = new FrameLayout(this);
                builder.setView(frameView);


                final AlertDialog alertDialog = builder.create();
                LayoutInflater inflater = alertDialog.getLayoutInflater();
                dialoglayout = inflater.inflate(R.layout.customized_builder, frameView);
                alertDialog.show();

                ButtonFlat acceptButton = (ButtonFlat) findViewById(R.id.acceptButtonDialog);
                acceptButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {

                    }
                });

                ButtonFlat declineButton = (ButtonFlat) findViewById(R.id.cancelButtonDialog);
                declineButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {

                    }
                });

问题是，当我单击按钮显示此警告对话框时，它会在此行生成空指针异常：

        acceptButton.setOnClickListener(new View.OnClickListener()

Answer 1

似乎在运行时，操作系统不知道这个按钮在哪里。 试试这个：

ButtonFlat acceptButton = (ButtonFlat) dialoglayout.findViewById(R.id.acceptButtonDialog);
                acceptButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {

                    }
                });

                ButtonFlat declineButton = (ButtonFlat) dialoglayout.findViewById(R.id.cancelButtonDialog);
                declineButton.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {

                    }
                });

just add dialoglayout.findViewById()