Kotlin DialogFragment editText可编辑始终为null [英] Kotlin DialogFragment editText editable always null

问题描述

所以，我正在使用Kotlin扩展，它很简单，但是我无法从edittext获取字符串

So, I'm using Kotlin extensions which is straightforward, but I can't get string from edittext

这是我的代码:

override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {

    val v = activity.layoutInflater
            .inflate(R.layout.dialog_group, null)

    v.add_group_button.setOnClickListener(addListener)

    return AlertDialog.Builder(activity)
            .setView(v)
            .create()
}

private var addListener: View.OnClickListener = View.OnClickListener {

        val groupNameInput: String = view?.group_edit_text?.text.toString()

    }

当我按下添加按钮groupNameInput时总是返回null为什么?

when I'm pressing add button groupNameInput always returns null why?

推荐答案

所以最后我弄清楚了-在Dialog Fragment视图上，它永远是空的，因为它从未创建过，但是已经创建并添加到对话框视图中，这意味着我需要致电:

So finally I figure it out — on Dialog Fragment view will always be null, because its never created, but it's created and added to dialog view which means I need to call:

dialog.group_edit_text.text.toString()

代替:

view.group_edit_text.text.toString()

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