Kotlin：Inflate加载的PopupWindow内EditText软键盘显示在弹窗后方

问题复现 #

通过inflate加载全屏PopupWindow时，软键盘显示在弹窗后方，被黑色不透明蒙层遮挡，对应实现代码：

val inflater = it.context?.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater?
val menuPopup = inflater!!.inflate(R.layout.popup_search_new_cosmetics,null)

val popup = PopupWindow(menuPopup, WindowManager.LayoutParams.MATCH_PARENT,
    WindowManager.LayoutParams.MATCH_PARENT, false)
popup.showAtLocation(menuPopup, Gravity.CENTER,0,0)
val imgClose = menuPopup.findViewById<ImageView>(R.id.imageClose)
menuPopup.findViewById<ImageView>(R.id.imageClose)
recycler = menuPopup.findViewById(R.id.editProductPage)

showKeyboard(menuPopup.findViewById(R.id.editTextSearch),this)


private fun showKeyboard(mEtSearch: EditText, context: Context) {
    mEtSearch.requestFocus()
    val imm = context.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
    imm.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0)
}

异常效果：

修复步骤 #

• 配置PopupWindow的软键盘适配模式，在调用showAtLocation前添加代码：
  popup.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE
• 为PopupWindow设置透明背景，避免默认黑色背景干扰窗口层级，和上述配置放在同一位置：
  popup.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
• 延迟触发软键盘弹出，等PopupWindow视图完成挂载后再执行弹键盘逻辑，替换原有直接调用showKeyboard的代码：

menuPopup.post {
    showKeyboard(menuPopup.findViewById(R.id.editTextSearch), this@CurrentPageActivity)
}

• 修正软键盘弹出方法，替换toggleSoftInput为绑定输入框的showSoftInput调用，避免软键盘窗口层级错误：

private fun showKeyboard(mEtSearch: EditText, context: Context) {
    mEtSearch.requestFocus()
    val imm = context.getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
    imm.showSoftInput(mEtSearch, InputMethodManager.SHOW_IMPLICIT)
}

内容的提问来源于stack exchange，提问作者Pedro J