如何在Kotlin Android中放置序列化并获取serializeContext? [英] How to put serialize and get serializeContext in Kotlin Android?

问题描述

我想保存并保持片段状态，因为当点击recyclerView项并使用侦听器返回片段时，我丢失了上下文，片段中的上下文为 null .
所以我尝试保持这样的上下文:

I want save and keep my state in fragment because when tap on recyclerView items and back to fragment with listener i lost my Context and my context in fragment is null.
So i try to keep my context like this:

override fun onSaveInstanceState(outState: Bundle) {
    super.onSaveInstanceState(outState)
    outState.putSerializable("SaveContext", context)
}

推荐答案

您应正确初始化context.例如，检查以下内容

You should initialize your context correctly. Check below as for example

class MyFragment: Fragment() {

    private var mContext: Context? = null

    override fun onAttach(context: Context) {
        super.onAttach(context)
        mContext = context
    }

    override fun onDetach() {
        super.onDetach()
        mContext = null
    }

    fun callbackListener() {
        mContext?.let { 
            //do your operation
        }
    }
}

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