popupwindow引用xml文件做弹窗

为什么我把spinner下拉列表的xml页，以popupwindow引用到新的页面当中做弹窗之后，下拉列表就失效了呢？

相关代码：

private void showPopupWindow(){
    //设置contentview
    View contentView = LayoutInflater.from(TransportIntoActivity.this).inflate(R.layout.fragment_transport_into_deposit,null);
    mPopWindow  = new PopupWindow(contentView,
           450,1005,true);
    mPopWindow.setContentView(contentView);


    adapter01 = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,bingxiang);
    adapter02 = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,cengshu);
    adapter03 = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, chouti);
    adapter04 = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item,heshu);
    //将adapter 添加到spinner中
    spinner01.setAdapter(adapter01);
    spinner02.setAdapter(adapter02);
    spinner03.setAdapter(adapter03);
    spinner04.setAdapter(adapter04);

    //添加事件Spinner事件监听
    spinner01.setOnItemSelectedListener(new SpinnerSelectedListener());
    spinner02.setOnItemSelectedListener(new SpinnerSelectedListener());
    spinner03.setOnItemSelectedListener(new SpinnerSelectedListener());
    spinner04.setOnItemSelectedListener(new SpinnerSelectedListener());

    //设置默认值
    spinner01.setVisibility(View.VISIBLE);
    spinner02.setVisibility(View.VISIBLE);
    spinner03.setVisibility(View.VISIBLE);
    spinner04.setVisibility(View.VISIBLE);

    //显示PopupWindow
    View rootview = LayoutInflater.from(TransportIntoActivity.this).inflate(R.layout.activity_transport_into,null);
    mPopWindow.showAtLocation(rootview, Gravity.CENTER,0,0);
}