When the soft keyboard is shown on Activity, but the software keyboard flashes after the popupwindow pops up on the Samsung mobile phone

I have a chat activity. At the bottom is EditText. On the top is the message displayed by recyclerView. Click the message to pop up the pop window. The situation is like this: When my EditText gets the focus and pops up the soft keyboard, click an item in recyclerView to pop up the pop window. However, on the Samsung mobile phone, the soft keyboard flashes, just like lifting it up again, but my demand is to keep the soft keyboard popping up but not flashing. Does anyone know what to do?