PopupWindow $BadTokenException: Unable to add window — token null is not valid

Question

I have the following error when showing a PopupWindow. The errors are triggered by the line:

checkInPopup.showAtLocation((ViewGroup) mapView.getParent(), Gra         


        

Answer 1

  @Override
protected void onCreate(Bundle savedInstanceState) {
    View view = LayoutInflater.from(mContext).inflate(R.layout.popup_window_layout, new LinearLayout(mContext), true);
    popupWindow = new PopupWindow(view, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    popupWindow.setContentView(view);
}

   @Override
public void onWindowFocusChanged(boolean hasFocus) {
    if (hasFocus) {
        popupWindow.showAtLocation(parentView, Gravity.BOTTOM, 0, 0);
    }
}

the correct way is popupwindow.show() at onWindowFocusChanged().