这是系统级bug,需要我们自定义PopupWindow

public class PopView extends PopupWindow {    public PopView(Context context) {        super(context);    }    public PopView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public PopView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    public PopView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {        super(context, attrs, defStyleAttr, defStyleRes);    }    public PopView() {    }    public PopView(View contentView) {        super(contentView);    }    public PopView(int width, int height) {        super(width, height);    }    public PopView(View contentView, int width, int height) {        super(contentView, width, height);    }    public PopView(View contentView, int width, int height, boolean focusable) {        super(contentView, width, height, focusable);    }    @Override    public void showAsDropDown(View anchor) {        if(Build.VERSION.SDK_INT >= 24) {            Rect rect = new Rect();            anchor.getGlobalVisibleRect(rect);            int h = anchor.getResources().getDisplayMetrics().heightPixels - rect.bottom;            setHeight(h);        }        super.showAsDropDown(anchor);    }}