IllegalArgumentException:指定为非null的参数为null [英] IllegalArgumentException: Parameter specified as non-null is null

问题描述

我遇到以下运行时错误:

 checkParameterIsNotNull, parameter oneClickTokens
    at com.info.app.fragments.Fragment_Payment_Profile$fetchMerchantHashes$1.onPostExecute(Fragment_Payment_Profile.kt:0)
    at com.info.app.fragments.Fragment_Payment_Profile$fetchMerchantHashes$1.onPostExecute(Fragment_Payment_Profile.kt:1543)

这是我的代码:

 private fun fetchMerchantHashes(intent: Intent) {
    // now make the api call.
    val postParams = "merchant_key=$key&user_credentials=$var1"
    val baseActivityIntent = intent
    object : AsyncTask<Void, Void, HashMap<String, String>>() {

        override fun doInBackground(vararg params: Void): HashMap<String, String>? {
                ...
        }

        override fun onPostExecute(oneClickTokens: HashMap<String, String>) {
            super.onPostExecute(oneClickTokens)
            ...

        }
    }.execute()
}

函数调用似乎无效.但是，我不知道如何解决此问题.我错过了Kotlin特有的东西吗?

It seems that the function call seems to be invalid. However, I don't know how to fix this problem. Is there anything Kotlin specific I've missed?

推荐答案

非常明显的例外:您正在传递null作为参数.

The exception is pretty clear: you're passing null for the parameter.

默认情况下， Kotlin 中的所有变量和参数都不为空.如果要将null参数传递给该方法，则应在其类型中添加?，例如:

By default all variables and parameters in Kotlin are non-null. If you want to pass null parameter to the method you should add ? to it's type, for example:

fun fetchMerchantHashes(intent: Intent?)

有关更多信息: null-safety . >

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