popup view android,Android Scroll View Popup不工作

我是

android的新手.我试图在android上实现可滚动的弹出窗口.

如果我进行滚动视图在我的视图中显示错误ScrollView只能托管一个直接子项(详细信息)

这是我的代码

private PopupWindow pwindo;

private void initiatePopupWindow() {

try {

// We need to get the instance of the LayoutInflater

LayoutInflater inflater = (LayoutInflater) About.this

.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

View layout = inflater.inflate(R.layout.screen_popup,

(ViewGroup) findViewById(R.id.popup_element));

pwindo = new PopupWindow(layout,700,1000, true);

// pwindo.showAtLocation(layout, Gravity.CENTER, 0, 0);

// pwindo.showAsDropDown(layout, 80, 80);

btnClosePopup = (Button) layout.findViewById(R.id.btn_close_popup);

btnClosePopup.setOnClickListener(cancel_button_click_listener);

} catch (Exception e) {

e.printStackTrace();

}

}

private OnClickListener cancel_button_click_listener = new OnClickListener() {

public void onClick(View v) {

pwindo.dismiss();

}

};

而我的观点

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="wrap_content"

android:layout_height="fill_parent"

android:orientation="vertical"

android:id="@+id/popup_element">

.

.

.

.

提前致谢.