为什么安卓popupwindow showAsDropDown offsetx是不是有效？ [英] Why android popupwindow showAsDropDown offsetx is not effective?

问题描述

popupWindow.showAsDropDown(morebutton, xOffset, yOffset);

不管xOffset的值，在弹出是在屏幕显示的右侧

No matter the value of xOffset, the popup is on the right side of the screen display

final PopupWindow popupWindow = new PopupWindow(DashboardActivity.applicationContext);
                        LayoutInflater inflater = (LayoutInflater) DashboardActivity.applicationContext.getSystemService(
                                Context.LAYOUT_INFLATER_SERVICE);
popupWindow.setFocusable(true);
                        popupWindow.setWidth(WindowManager.LayoutParams.WRAP_CONTENT);
                        popupWindow.setHeight(WindowManager.LayoutParams.WRAP_CONTENT);
                        popupWindow.setContentView(view);
                        popupWindow.setBackgroundDrawable(new ColorDrawable(
                                android.graphics.Color.TRANSPARENT));
popupWindow.showAsDropDown(morebutton, **-220**, -40);

不管我怎么设置的值offsetX，他是在屏幕显示的右侧

No matter what I set the value offsetX, he is on the right side of the screen display

推荐答案

PopupWindow 试图调整你的内容查看来你的锚的 Gravity.TOP | Gravity.START 默认（左上角）。如果没有留给你的内容查看空间它被抵消，以适应屏幕，这可能是为什么它停留在你右手边的。

PopupWindow tries to align your contentView to your anchor's Gravity.TOP | Gravity.START (top left corner) by default. If there is no space left for your contentView it gets offset to fit on the screen, which is probably why it stays on your right side.

以下xOffset将调整内容查看你的锚的右上角：

The following xOffset will align the contentView at your anchor's top right corner:

view.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
int xOffset = -(view.getMeasuredWidth() - morebutton.getWidth());

popupWindow.showAsDropDown(morebutton, xOffset, 0);

您可能想是这样的：

popupWindow.showAsDropDown(morebutton, xOffset - 220, -40);

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