Simple practical case of popupwindow (displayed below the control)

Step 1:

private PopupWindow mPopupWindow;

Step 2: write a popupwindow layout file XML

Step 3: write code in activity

Note:

If an error is reported when directly writing the pop-up popupwindow() method in the oncreate() method of the activity, because the popupwindow cannot be pop-up until the activity is fully started, we only need to pop up the popupwindow after the activity is fully started.

Rewrite the onwindowfocuschanged() method:

The above simple practical case of popupwindow (shown below the control) is all the content shared by Xiaobian. I hope it can give you a reference and support more programming tips.