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我正在尝试从没有活动的 IME 服务(屏幕键盘)中显示一个弹出窗口。当我调用 popUp.showAtLocation(layout, Gravity.CENTER, 0, -100) 时,我收到“Windowmanager$BadTokenException: Unable to add window -- token null is not valid”。我知道从没有相关活动的服务中打开弹出窗口有点不寻常——这可能吗?

这是我的代码:

public void initiatePopupWindow()
{
    try {

        LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.popup_layout,null);

        // create a 300px width and 470px height PopupWindow
        popUp = new PopupWindow(layout, 300, 470, true);
        popUp.showAtLocation(layout, Gravity.CENTER, 0, -100);


        Button cancelButton = (Button) layout.findViewById(R.id.popup_cancel_button);
        cancelButton.setOnClickListener(inputView.cancel_button_click_listener);

    } catch (Exception e) {
        e.printStackTrace();
    }
}

任何帮助,将不胜感激。谢谢

4

1 回答 1

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我发现了问题——我试图使用布局绘制一个弹出窗口并使用与父级相同的布局。解决方案是将父级设置为另一个视图。我发现它也是重要的,以确保在创建弹出窗口之前已经创建了视图(例如,通过使用处理程序/可运行)。

public void initiatePopupWindow()
{
    try {
        Log.i("dotdashkeyboard","initiatePopupWindow (from IME service)");
        LayoutInflater inflater = (LayoutInflater) this.getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View layout = inflater.inflate(R.layout.popup_layout,null);

        // create a 300px width and 470px height PopupWindow
        popUp = new PopupWindow(layout, 300, 470, false);
        popUp.showAtLocation(inputView, Gravity.CENTER, 0, -100);

        Button cancelButton = (Button) layout.findViewById(R.id.popup_cancel_button);
        cancelButton.setOnClickListener(inputView.cancel_button_click_listener);

    } catch (Exception e) {
        e.printStackTrace();
    }
}
于 2012-12-23T19:00:30.810 回答