java.lang.IllegalArgumentException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkParameterIsNotNull, parameter convertView
Adapter.getView
at android.widget.AbsListView.obtainView(AbsListView.java:2346)
at android.widget.ListView.makeAndAddView(ListView.java:1876)
at android.widget.ListView.fillDown(ListView.java:702)
at android.widget.ListView.fillFromTop(ListView.java:763)
at android.widget.ListView.layoutChildren(ListView.java:1671)
at android.widget.AbsListView.onLayout(AbsListView.java:2148)
这是android的logcat。
我尝试使用 java 它工作正常,基本适配器在 Adapter 或其他方面有问题。
我尝试使用 public constructor
和 array list count 3 发现我检查了它。总是在 getView
MyAdapter 代码::
inner class MyAppAdapter constructor(private val parkingList: ArrayList<App>, private val mContext: Context) : BaseAdapter() {
override fun getCount(): Int {
return this.parkingList.size
}
override fun getItem(position: Int): Any {
return position
}
override fun getItemId(position: Int): Long {
return position.toLong()
}
override fun getView(position: Int, convertView: View, parent: ViewGroup): View? {
val viewHolder: ViewHolder
var rowView: View? = convertView
if (rowView == null) {
rowView = LayoutInflater.from(mContext).inflate(R.layout.item_more_apps, parent, false)
viewHolder = ViewHolder()
viewHolder.appIcon = rowView.findViewById(R.id.appIcon)
viewHolder.appName = rowView.findViewById(R.id.appName)
viewHolder.appDescription = rowView.findViewById(R.id.appDescription)
rowView.tag = viewHolder
} else {
viewHolder = convertView.tag as ViewHolder
}
viewHolder.appName!!.text = String.format("%s", this.parkingList[position].name)
viewHolder.appDescription!!.text = String.format("%s", this.parkingList[position].description)
Glide.with(applicationContext).load(this.parkingList[position].icon).into(viewHolder.appIcon!!)
rowView?.setOnClickListener {
try {
startActivity(Intent("android.intent.action.VIEW", Uri.parse("market://details?id=" + this@MyAppAdapter.parkingList[position].link)))
} catch (e: ActivityNotFoundException) {
startActivity(Intent("android.intent.action.VIEW", Uri.parse("http://play.google.com/store/apps/details?id=" + this@MyAppAdapter.parkingList[position].link)))
}
}
return rowView
}
inner class ViewHolder {
var appDescription: TextView? = null
var appIcon: ImageView? = null
var appName: TextView? = null
}
}
用于 AsyncTask
-> onPostExecute
myAppAdapter = MyAppAdapter(appArrayList, applicationContext)
lvPoses!!.adapter = myAppAdapter
变量是这样清除的
lateinit var myAppAdapter: MyAppAdapter
private val appArrayList = ArrayList<App>()
private var lvPoses: ListView? = null
最佳答案
convertView
如果尚未创建 View ,则可以为 null。修复参数声明:
override fun getView(position: Int, convertView: View?, parent:
ViewGroup): View? {
...
}
关于android - Adapter.getView Kotlin android 参数 convertView 上的 IllegalArgumentException,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50705466/