如何使AlertDialog弹出窗口在来电屏幕中滚动？

Question

我使用WindowManager在来电屏幕上创建一个浮动按钮。拨打新号码时，我可以单击按钮，然后弹出AlertDialog添加新联系人。但是，当有来电时，我单击按钮，弹出窗口不可滚动。当我结束通话时，弹出窗口可以滚动。我该如何解决这个问题？我需要它始终可滚动！

类PhonecallReceiver扩展了BroadcastReceiver：

    @Override
        protected void onIncomingCallStarted(Context ctx, String number, Date start) {
    //...
    if (!myDB.checkIsDataAlreadyInDBorNot(number)){
                int LAYOUT_FLAG;
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                    LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
                } else {
                    LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_PHONE;
                }
                wm = (WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE);
                params = new WindowManager.LayoutParams(
                        WindowManager.LayoutParams.WRAP_CONTENT,
                        WindowManager.LayoutParams.WRAP_CONTENT,
                        LAYOUT_FLAG,
                        WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
                        PixelFormat.TRANSPARENT);
                params.flags =
                         WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
                params.gravity = Gravity.LEFT | Gravity.TOP;
                params.x = 500;
                params.y = 500;
    
                LayoutInflater layoutInflater = LayoutInflater.from(ctx);
                addButtonView =layoutInflater.inflate(R.layout.activity_add__new__button,null);
                Button addButton =(Button)addButtonView.findViewById(R.id.addNEWContactBtn);
                    addButton.setOnClickListener(addNEWOnClickListener);
                    addButton.setOnTouchListener(addBtnTouchListener);
                wm.addView(addButtonView, params);

//...
private Button.OnClickListener addNEWOnClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            System.out.println("you click me");
            Intent intent=new Intent(context,Add_New_ButtonActivity.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent);

        }
    };

Add_New_ButtonActivity：

    public class Add_New_ButtonActivity extends Activity {
    private AlertDialog.Builder dialogBuilder;
    private AlertDialog dialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        createNewContactDialog();
//        setContentView(R.layout.activity_add__new__button);
    }
    public void createNewContactDialog(){
        dialogBuilder = new AlertDialog.Builder(this);
        final  View contactPopupView = getLayoutInflater().inflate(R.layout.activity_add_contacts, null);
        dialogBuilder.setView(contactPopupView);
        dialog = dialogBuilder.create();

        dialog.show();
    }
}

请提供任何帮助，非常感谢。