问题描述
我正在开发一个新的应用程序，并且已经实现了recyclerview，但是它并没有加载数据，仅显示进度条的加载，我不知道问题出在哪里。
我正在开发一个新的应用程序，并且已经实现了recyclerview，但是它并没有加载数据，仅显示进度条加载，我不知道问题出在哪里
在我实现了网络通话的MemberActivity.kt类下面
class MemberActivity : AppCompatActivity() {
private var memberAdapter:MemberAdapter? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_member)
val compositedisposable = Compositedisposable()
compositedisposable.add(
ServiceBuilder.buildService(SpectrumInterface::class.java).getMembers()
.observeOn(AndroidSchedulers.mainThread())
.subscribeOn(Schedulers.io())
.subscribe(
{ members -> onResponse(members) },{ t -> onFailure(t) })
)
}
private fun onFailure(t: Throwable) {
Toast.makeText(this,t.message,Toast.LENGTH_SHORT).show()
}
private fun onResponse(members: List<Member>) {
memberAdapter = MemberAdapter()
recyclerView.apply {
setHasFixedSize(true)
progressBar.visibility = View.GONE
layoutManager = linearlayoutmanager(this@MemberActivity)
adapter = memberAdapter
}
}
}
below my Adapter class
class MemberAdapter() : RecyclerView.Adapter<MemberAdapter.MemberViewHolder>() {
private val members = mutablelistof<Member>()
override fun onCreateViewHolder(
parent: ViewGroup,viewType: Int
): MemberAdapter.MemberViewHolder {
val view = LayoutInflater.from(parent.context).inflate(R.layout.member_list,parent,false)
return MemberViewHolder(view)
}
override fun getItemCount(): Int {
return members.size
}
override fun onBindViewHolder(holder: MemberAdapter.MemberViewHolder,position: Int) {
return holder.bind(members[position])
}
class MemberViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
private val memberAge: TextView = itemView.findViewById(R.id.memberAge)
private val memberName: TextView = itemView.findViewById(R.id.memberName)
private val lastName: TextView = itemView.findViewById(R.id.lastName)
private val firstName:TextView = itemView.findViewById(R.id.firstName)
private val emailAddress:TextView = itemView.findViewById(R.id.emailAddress)
private val phone:TextView = itemView.findViewById(R.id.phone)
fun bind(member: Member) {
memberAge.text = member.age.toString()
memberName.text = member.name.toString()
lastName.text = member.name.last
firstName.text = member.name.first
emailAddress.text = member.email
phone.text = member.phone
}
}
}
在我的ServiceBuilder.kt下
object ServiceBuilder {
private val client = OkHttpClient.Builder()
.addInterceptor(HttpLoggingInterceptor().setLevel(HttpLoggingInterceptor.Level.BODY))
.build()
private val retrofit = Retrofit.Builder()
.baseUrl("https://api.npoint.io/")
.addConverterFactory(ScalarsConverterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.addCallAdapterFactory(RxJava2CallAdapterFactory.createWithScheduler(Schedulers.io()))
.client(client)
.build()
fun<T> buildService(service: Class<T>): T{
return retrofit.create(service)
}
}
下方 SpectrumInterface.kt
interface SpectrumInterface {
@GET("15c43d65bc7a989f47f1")
fun getMembers(): Observable<List<Member>>
}
低于Member.kt
data class Member(
@Serializedname("age")
val age: Int,@Serializedname("email")
val email: String,@Serializedname("_id")
val id: String,@Serializedname("name")
val name: Name,@Serializedname("phone")
val phone: String
)
解决方法
在您的adpater中，因为您每次收到数据都会创建一个新的，所以请执行以下操作
%初始化操作
class MemberAdapter(private val members: List<Member>())
然后在此代码之后
MemberAdapter(memebers)
正确的解决方案
仅制作一个MemberAdpater
因此将其转换为不可变 在活动中
recyclerView.apply {
setHasFixedSize(true)
progressBar.visibility = View.GONE
layoutManager = LinearLayoutManager(this@MemberActivity)
adapter = memberAdapter
}
memberAdapter.notififyDataSetChanged()
然后在适配器中创建一个替换数据的功能
类似
private val memberAdapter:MemberAdapter = MemberAdapter()