I'm trying to add an element list to the list of string, but I found Kotlin
does not have an add function like java
so please help me out how to add the items to the list.
class RetrofitKotlin : AppCompatActivity() {
var listofVechile:List<Message>?=null
var listofVechileName:List<String>?=null
var listview:ListView?=null
var progressBar:ProgressBar?=null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_retrofit_kotlin)
listview=findViewById<ListView>(R.id.mlist)
var apiInterfacee=ApiClass.client.create(ApiInterfacee::class.java)
val call=apiInterfacee.getTaxiType()
call.enqueue(object : Callback<TaxiTypeResponse> {
override fun onResponse(call: Call<TaxiTypeResponse>, response: Response<TaxiTypeResponse>) {
listofVechile=response.body()?.message!!
println("Sixze is here listofVechile ${listofVechile!!.size}")
if (listofVechile!=null) {
for (i in 0..listofVechile!!.size-1) {
//how to add the name only listofVechileName list
}
}
//println("Sixze is here ${listofVechileName!!.size}")
val arrayadapter=ArrayAdapter<String>(this@RetrofitKotlin,android.R.layout.simple_expandable_list_item_1,listofVechileName)
listview!!.adapter=arrayadapter
}
override fun onFailure(call: Call<TaxiTypeResponse>, t: Throwable) {
}
})
}
}
A more idiomatic approach would be to use MutableList
instead of specifically ArrayList
. You can declare:
val listOfVehicleNames: MutableList<String> = mutableListOf()
And add to it that way. Alternatively, you may wish to prefer immutability, and declare it as:
var listOfVehicleNames: List<String> = emptyList()
And in your completion block, simply reassign it:
listOfVehicleNames = response.body()?.message()?.orEmpty()
.map { it.name() /* assumes name() function exists */ }