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BlueScreen
Asked:2020-06-12 17:01:59 +0000 UTC2020-06-12 17:01:59 +0000 UTC

ArrayAdapter 微调器的问题

  • 772

写了这段代码：

import android.widget.ArrayAdapter

//代码块//

val values : Array<String> = arrayOf("USD", "UAH", "GBD", "EUR", "BIT", "RUB")
val adapter = ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, values)

但是，IDE 会引发错误

None of the following functions can be called with the arguments supplied.

<init>(Context, Int, Array<(out) TypeVariable(T)!>)
  where T = TypeVariable(T) for 
  constructor ArrayAdapter<T : Any!>(context: Context, resource: Int, objects: Array<(out) T!>) defined in android.widget.ArrayAdapter
<init>(Context, Int, Int)
  where T = TypeVariable(T) for 
  constructor ArrayAdapter<T : Any!>(context: Context, resource: Int, textViewResourceId: Int) defined in android.widget.ArrayAdapter
<init>(Context, Int, (Mutable)List<TypeVariable(T)!>)
  where T = TypeVariable(T) for 
  constructor ArrayAdapter<T : Any!>(context: Context, resource: Int, objects: (Mutable)List<T!>) defined in android.widget.ArrayAdapter Alt+Shift+Enter Alt+Enter

你能建议这里有什么问题吗？

android

1 个回答

  1. Best Answer

    如果有，则需要将其替换HomeFragment为or 。thisrequireActivity()requireContext()

    Fragment与活动不同，它不是从类继承的Context，这意味着它不能作为上下文传递给参数。以上 2 种方法只是可以在任何内部获取上下文Fragment-а

    • 1

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