popupwindow显示的位置 布局的右上角，标题栏下

View popview = View.inflate(activity, R.layout.popwindow_layout, null);
int width = Dp2pxUtils.Dp2Px(context, 150f);
popupWindow = new PopupWindow(popview, width, LinearLayout.LayoutParams.WRAP_CONTENT);
AnimationUtils.showTitlePopWindowAnimation(popview);//给popwindow添加动画
initPopWindowListview(popview);
popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
View parent = View.inflate(context, R.layout.activity_main_drawerlayout, null);
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int x = Dp2pxUtils.Dp2Px(context, 20f);
int titleHeight = Dp2pxUtils.Dp2Px(context, 60f);
/**
* parent:弹窗放置的父布局
* Gravity.TOP + Gravity.RIGHT  该布局的右上角
* x   相对于右上角x方向偏移多少
* fram.top+titleHeight  y方向上的偏移值。
*/
popupWindow.showAtLocation(parent, Gravity.TOP + Gravity.RIGHT, x, frame.top + titleHeight);
popupWindow.setOutsideTouchable(true);
popupWindow.setFocusable(true);
popupWindow.update();
popOutShadow(popupWindow);//使popwindow以外区域阴影显示