如何在片段中进行contentResovlver？

Question

contentResolver是未解决的引用: contentResolver如何纠正这个问题？

class fragment_edcards_media_animimage : Fragment() {
// TODO: Rename and change types of parameters
private var param1: String? = null
private var param2: String? = null
lateinit var u : FragmentEdcardsMediaAnimimageBinding

// Animated Image
private val getContentCardAnimImage = registerForActivityResult(ActivityResultContracts.GetContent())  { uri: Uri ->

    val contentResolver = contentResolver
    val source = ImageDecoder.createSource( contentResolver, uri )
    val drawable = ImageDecoder.decodeDrawable(source)

    Log.d("EditCards",uri.toString())

    //u.iViewAnimImage.setImageDrawable(drawable)
    if (drawable is AnimatedImageDrawable){
        drawable.start()
        //drawable.repeatCount = 2
    }

    val file = File( uri?.path )
    mydecklist[cCardPosition].c_animimageuri = mytools.getImageFromMediaStore(u.iViewAnimImage.context,file.name)
}

尝试#1 activity.contentResovlver导致；只有安全(？)或非空断言(！！)FragmentActivity类型的可空接收器是否允许调用？

尝试#2 val contentResolver = activity?.contentResolver

val = ImageDecoder.createSource( ImageDecoder.createSource uri )类型错配:推断类型是ContentResolver？但ContentResolver是预料中的

我已经用粗体显示了它认为错误在行ImageDecoder中的地方。

尝试#3 val contentResolver = getActivity().contentResolver()表达式'contentResolver‘，类型为'ContentResolver!’不能作为函数调用。找不到函数'invoke()‘

和

只有安全(？)或非空断言(！！)FragmentActivity类型的可空接收器是否允许调用？

Answer 1

这似乎就是答案；val contentResolver = requireActivity().contentResolver

谢谢CommonsWave