为什么改造在 mainactivity 中给出错误？
why retrofit giving an error in mainactivity?
我正在开发货币应用程序，但是当我尝试在 mainactivity.kt 中实现网络调用时出现错误我不明白我到底在哪里出错
低于我的MainActivity.kt
我在哪里实现了改造网络调用
class MainActivity : AppCompatActivity() {
private var listUsers: MutableList<Quotes> = mutableListOf<Quotes>()
private var adapter: CurrenciesAdapter? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
listUsers = mutableListOf()
recycler_main.layoutManager = LinearLayoutManager(this@MainActivity)
adapter = CurrenciesAdapter(
this,
listUsers
)
recycler_main.adapter = adapter
if (isInternetAvailable()) {
getUsersData()
}
}
private fun getUsersData() {
showProgressBar()
var apiInterface: CurrenciesResponse = CurrencyClient().getApiClient()!!.create(
CurrenciesResponse::class.java
)
apiInterface.getCurrencies().enqueue(object : Callback <MutableList<Quotes>> {
override fun onResponse(
call: Call<MutableList<Quotes>>,
response: Response<MutableList<Quotes>>
) {
hideProgressBar()
val currencyResponse = response.body()
listUsers.clear()
currencyResponse.let { listUsers.addAll(it)}
adapter?.notifyDataSetChanged()
}
override fun onFailure(call: Call<MutableList<Quotes>>, t: Throwable) {
hideProgressBar()
Log.e("error", t.localizedMessage)
}
})
}
}
低于我的activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_main"
android:layout_width="392dp"
android:layout_height="736dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
低于我的适配器 class
class CurrenciesAdapter(private val context: Context, private var list: MutableList<Quotes>) : RecyclerView.Adapter<CurrenciesAdapter.MyViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
val inflater = LayoutInflater.from(context)
val view: View = inflater.inflate(R.layout.currency_layout,parent,false)
return MyViewHolder(view)
}
override fun getItemCount(): Int {
return list.size
}
override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
val user = list.get(position)
holder.name?.text = user.USDAED.toString()
holder.info1?.text = user?.USDAFN.toString()
holder.info2?.text = user?.USDALL.toString()
val addressObj = user.USDANG
holder.address?.text = user.USDAOA.toString()
}
class MyViewHolder(var view: View) : RecyclerView.ViewHolder(view){
var name: TextView? = null
var info1: TextView? = null
var info2: TextView? = null
var address: TextView? = null
init {
name = view.findViewById(R.id.txt_user_name)
info1 = view.findViewById(R.id.txt_user_info1)
info2 = view.findViewById(R.id.txt_user_info2)
address = view.findViewById(R.id.txt_user_address)
}
}
}
低于currency_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardCornerRadius="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:layout_marginStart="15dp"
android:layout_marginEnd="15dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<TextView
android:id="@+id/txt_user_name"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="22sp"
android:textStyle="bold" />
<TextView
android:id="@+id/txt_user_info1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txt_user_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp" />
<TextView
android:id="@+id/txt_user_info2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txt_user_info1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp" />
<TextView
android:id="@+id/txt_user_address"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txt_user_info2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
CurrenciesResponse 界面下方
interface CurrenciesResponse {
@GET("live?access_key=1f72464a836ff6084b8b1780e3feadf9")
fun getCurrencies(): Call<CurrencyResponse>
}
低于 baseUrl 实现
class CurrencyClient {
private val BASE_URL = "http://api.currencylayer.com/"
public var retrofit: Retrofit? = null
public fun getApiClient(): Retrofit? {
if (retrofit == null) {
retrofit = Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create()).build()
}
return retrofit
}
}
低于CurrencyResponse.kt
data class CurrencyResponse(
val privacy: String,
val quotes: Quotes,
val source: String,
val success: Boolean,
val terms: String,
val timestamp: Int
)
低于Quotes.kt
data class Quotes(
val USDAED: Double,
val USDAFN: Double,
val USDALL: Double,
val USDAMD: Double,
val USDANG: Double,
val USDAOA: Double,
val USDARS: Double,
val USDAUD: Double,
val USDAWG: Double,
val USDAZN: Double,
val USDBAM: Double,
val USDBBD: Double,
val USDBDT: Double,
val USDBGN: Double,
val USDBHD: Double,
val USDBIF: Int,
val USDBMD: Int,
val USDBND: Double,
val USDBOB: Double,
val USDBRL: Double,
val USDBSD: Double,
val USDBTC: Double,
val USDBTN: Double,
val USDBWP: Double,
val USDBYN: Double,
val USDBYR: Int,
val USDBZD: Double,
val USDCAD: Double,
val USDCDF: Double,
val USDCHF: Double,
val USDCLF: Double,
val USDCLP: Double,
val USDCNY: Double,
val USDCOP: Double,
val USDCRC: Double,
val USDCUC: Int,
val USDCUP: Double,
val USDCVE: Double,
val USDCZK: Double,
val USDDJF: Double,
val USDDKK: Double,
val USDDOP: Double,
val USDDZD: Double,
val USDEGP: Double,
val USDERN: Double,
val USDETB: Double,
val USDEUR: Double,
val USDFJD: Double,
val USDFKP: Double,
val USDGBP: Double,
val USDGEL: Double,
val USDGGP: Double,
val USDGHS: Double,
val USDGIP: Double,
val USDGMD: Double,
val USDGNF: Double,
val USDGTQ: Double,
val USDGYD: Double,
val USDHKD: Double,
val USDHNL: Double,
val USDHRK: Double,
val USDHTG: Double,
val USDHUF: Double,
val USDIDR: Double,
val USDILS: Double,
val USDIMP: Double,
val USDINR: Double,
val USDIQD: Double,
val USDIRR: Double,
val USDISK: Double,
val USDJEP: Double,
val USDJMD: Double,
val USDJOD: Double,
val USDJPY: Double,
val USDKES: Double,
val USDKGS: Double,
val USDKHR: Double,
val USDKMF: Double,
val USDKPW: Double,
val USDKRW: Double,
val USDKWD: Double,
val USDKYD: Double,
val USDKZT: Double,
val USDLAK: Double,
val USDLBP: Double,
val USDLKR: Double,
val USDLRD: Double,
val USDLSL: Double,
val USDLTL: Double,
val USDLVL: Double,
val USDLYD: Double,
val USDMAD: Double,
val USDMDL: Double,
val USDMGA: Double,
val USDMKD: Double,
val USDMMK: Double,
val USDMNT: Double,
val USDMOP: Double,
val USDMRO: Double,
val USDMUR: Double,
val USDMVR: Double,
val USDMWK: Double,
val USDMXN: Double,
val USDMYR: Double,
val USDMZN: Double,
val USDNAD: Double,
val USDNGN: Double,
val USDNIO: Double,
val USDNOK: Double,
val USDNPR: Double,
val USDNZD: Double,
val USDOMR: Double,
val USDPAB: Double,
val USDPEN: Double,
val USDPGK: Double,
val USDPHP: Double,
val USDPKR: Double,
val USDPLN: Double,
val USDPYG: Double,
val USDQAR: Double,
val USDRON: Double,
val USDRSD: Double,
val USDRUB: Double,
val USDRWF: Int,
val USDSAR: Double,
val USDSBD: Double,
val USDSCR: Double,
val USDSDG: Double,
val USDSEK: Double,
val USDSGD: Double,
val USDSHP: Double,
val USDSLL: Double,
val USDSOS: Double,
val USDSRD: Double,
val USDSTD: Double,
val USDSVC: Double,
val USDSYP: Double,
val USDSZL: Double,
val USDTHB: Double,
val USDTJS: Double,
val USDTMT: Double,
val USDTND: Double,
val USDTOP: Double,
val USDTRY: Double,
val USDTTD: Double,
val USDTWD: Double,
val USDTZS: Double,
val USDUAH: Double,
val USDUGX: Double,
val USDUSD: Int,
val USDUYU: Double,
val USDUZS: Double,
val USDVEF: Double,
val USDVND: Int,
val USDVUV: Double,
val USDWST: Double,
val USDXAF: Double,
val USDXAG: Double,
val USDXAU: Double,
val USDXCD: Double,
val USDXDR: Double,
val USDXOF: Double,
val USDXPF: Double,
val USDYER: Double,
val USDZAR: Double,
val USDZMK: Double,
val USDZMW: Double,
val USDZWL: Double
)
我想知道我在哪里犯了错误我必须做什么才能在 MainActivity.kt
中正确实施网络
我只是手动点击 API。
看来问题出在接收类型MutableList<Quotes>
apiInterface.getCurrencies().enqueue(object : Callback <CurrencyResponse> {
override fun onResponse(
call: Call<CurrencyResponse>,
response: Response<CurrencyResponse>
) {
hideProgressBar()
//your logic goes here
}
override fun onFailure(call: Call<CurrencyResponse>, t: Throwable) {
hideProgressBar()
Log.e("error", t.localizedMessage)
}
})
data class CurrencyResponse(
val privacy: String,
val quotes: Quotes,
val source: String,
val success: Boolean,
val terms: String,
val timestamp: Int
)
和val timestamp: Int，你应该这样做
data class CurrencyResponse(
val privacy: String,
val quotes: Quotes,
val source: String,
val success: Boolean,
val terms: String,
val timestamp: Long
)
由于您的 API 结果为 "timestamp": 1610813346，建议将其保存在 Long 类型的变量中。就像我们对 System.currentTimeMillis().
所做的那样
我正在开发货币应用程序，但是当我尝试在 mainactivity.kt 中实现网络调用时出现错误我不明白我到底在哪里出错
低于我的MainActivity.kt
我在哪里实现了改造网络调用
class MainActivity : AppCompatActivity() {
private var listUsers: MutableList<Quotes> = mutableListOf<Quotes>()
private var adapter: CurrenciesAdapter? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
listUsers = mutableListOf()
recycler_main.layoutManager = LinearLayoutManager(this@MainActivity)
adapter = CurrenciesAdapter(
this,
listUsers
)
recycler_main.adapter = adapter
if (isInternetAvailable()) {
getUsersData()
}
}
private fun getUsersData() {
showProgressBar()
var apiInterface: CurrenciesResponse = CurrencyClient().getApiClient()!!.create(
CurrenciesResponse::class.java
)
apiInterface.getCurrencies().enqueue(object : Callback <MutableList<Quotes>> {
override fun onResponse(
call: Call<MutableList<Quotes>>,
response: Response<MutableList<Quotes>>
) {
hideProgressBar()
val currencyResponse = response.body()
listUsers.clear()
currencyResponse.let { listUsers.addAll(it)}
adapter?.notifyDataSetChanged()
}
override fun onFailure(call: Call<MutableList<Quotes>>, t: Throwable) {
hideProgressBar()
Log.e("error", t.localizedMessage)
}
})
}
}
低于我的activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler_main"
android:layout_width="392dp"
android:layout_height="736dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
低于我的适配器 class
class CurrenciesAdapter(private val context: Context, private var list: MutableList<Quotes>) : RecyclerView.Adapter<CurrenciesAdapter.MyViewHolder>() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
val inflater = LayoutInflater.from(context)
val view: View = inflater.inflate(R.layout.currency_layout,parent,false)
return MyViewHolder(view)
}
override fun getItemCount(): Int {
return list.size
}
override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
val user = list.get(position)
holder.name?.text = user.USDAED.toString()
holder.info1?.text = user?.USDAFN.toString()
holder.info2?.text = user?.USDALL.toString()
val addressObj = user.USDANG
holder.address?.text = user.USDAOA.toString()
}
class MyViewHolder(var view: View) : RecyclerView.ViewHolder(view){
var name: TextView? = null
var info1: TextView? = null
var info2: TextView? = null
var address: TextView? = null
init {
name = view.findViewById(R.id.txt_user_name)
info1 = view.findViewById(R.id.txt_user_info1)
info2 = view.findViewById(R.id.txt_user_info2)
address = view.findViewById(R.id.txt_user_address)
}
}
}
低于currency_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardCornerRadius="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:layout_marginStart="15dp"
android:layout_marginEnd="15dp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<TextView
android:id="@+id/txt_user_name"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="22sp"
android:textStyle="bold" />
<TextView
android:id="@+id/txt_user_info1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txt_user_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp" />
<TextView
android:id="@+id/txt_user_info2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txt_user_info1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp" />
<TextView
android:id="@+id/txt_user_address"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/txt_user_info2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
CurrenciesResponse 界面下方
interface CurrenciesResponse {
@GET("live?access_key=1f72464a836ff6084b8b1780e3feadf9")
fun getCurrencies(): Call<CurrencyResponse>
}
低于 baseUrl 实现
class CurrencyClient {
private val BASE_URL = "http://api.currencylayer.com/"
public var retrofit: Retrofit? = null
public fun getApiClient(): Retrofit? {
if (retrofit == null) {
retrofit = Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create()).build()
}
return retrofit
}
}
低于CurrencyResponse.kt
data class CurrencyResponse(
val privacy: String,
val quotes: Quotes,
val source: String,
val success: Boolean,
val terms: String,
val timestamp: Int
)
低于Quotes.kt
data class Quotes(
val USDAED: Double,
val USDAFN: Double,
val USDALL: Double,
val USDAMD: Double,
val USDANG: Double,
val USDAOA: Double,
val USDARS: Double,
val USDAUD: Double,
val USDAWG: Double,
val USDAZN: Double,
val USDBAM: Double,
val USDBBD: Double,
val USDBDT: Double,
val USDBGN: Double,
val USDBHD: Double,
val USDBIF: Int,
val USDBMD: Int,
val USDBND: Double,
val USDBOB: Double,
val USDBRL: Double,
val USDBSD: Double,
val USDBTC: Double,
val USDBTN: Double,
val USDBWP: Double,
val USDBYN: Double,
val USDBYR: Int,
val USDBZD: Double,
val USDCAD: Double,
val USDCDF: Double,
val USDCHF: Double,
val USDCLF: Double,
val USDCLP: Double,
val USDCNY: Double,
val USDCOP: Double,
val USDCRC: Double,
val USDCUC: Int,
val USDCUP: Double,
val USDCVE: Double,
val USDCZK: Double,
val USDDJF: Double,
val USDDKK: Double,
val USDDOP: Double,
val USDDZD: Double,
val USDEGP: Double,
val USDERN: Double,
val USDETB: Double,
val USDEUR: Double,
val USDFJD: Double,
val USDFKP: Double,
val USDGBP: Double,
val USDGEL: Double,
val USDGGP: Double,
val USDGHS: Double,
val USDGIP: Double,
val USDGMD: Double,
val USDGNF: Double,
val USDGTQ: Double,
val USDGYD: Double,
val USDHKD: Double,
val USDHNL: Double,
val USDHRK: Double,
val USDHTG: Double,
val USDHUF: Double,
val USDIDR: Double,
val USDILS: Double,
val USDIMP: Double,
val USDINR: Double,
val USDIQD: Double,
val USDIRR: Double,
val USDISK: Double,
val USDJEP: Double,
val USDJMD: Double,
val USDJOD: Double,
val USDJPY: Double,
val USDKES: Double,
val USDKGS: Double,
val USDKHR: Double,
val USDKMF: Double,
val USDKPW: Double,
val USDKRW: Double,
val USDKWD: Double,
val USDKYD: Double,
val USDKZT: Double,
val USDLAK: Double,
val USDLBP: Double,
val USDLKR: Double,
val USDLRD: Double,
val USDLSL: Double,
val USDLTL: Double,
val USDLVL: Double,
val USDLYD: Double,
val USDMAD: Double,
val USDMDL: Double,
val USDMGA: Double,
val USDMKD: Double,
val USDMMK: Double,
val USDMNT: Double,
val USDMOP: Double,
val USDMRO: Double,
val USDMUR: Double,
val USDMVR: Double,
val USDMWK: Double,
val USDMXN: Double,
val USDMYR: Double,
val USDMZN: Double,
val USDNAD: Double,
val USDNGN: Double,
val USDNIO: Double,
val USDNOK: Double,
val USDNPR: Double,
val USDNZD: Double,
val USDOMR: Double,
val USDPAB: Double,
val USDPEN: Double,
val USDPGK: Double,
val USDPHP: Double,
val USDPKR: Double,
val USDPLN: Double,
val USDPYG: Double,
val USDQAR: Double,
val USDRON: Double,
val USDRSD: Double,
val USDRUB: Double,
val USDRWF: Int,
val USDSAR: Double,
val USDSBD: Double,
val USDSCR: Double,
val USDSDG: Double,
val USDSEK: Double,
val USDSGD: Double,
val USDSHP: Double,
val USDSLL: Double,
val USDSOS: Double,
val USDSRD: Double,
val USDSTD: Double,
val USDSVC: Double,
val USDSYP: Double,
val USDSZL: Double,
val USDTHB: Double,
val USDTJS: Double,
val USDTMT: Double,
val USDTND: Double,
val USDTOP: Double,
val USDTRY: Double,
val USDTTD: Double,
val USDTWD: Double,
val USDTZS: Double,
val USDUAH: Double,
val USDUGX: Double,
val USDUSD: Int,
val USDUYU: Double,
val USDUZS: Double,
val USDVEF: Double,
val USDVND: Int,
val USDVUV: Double,
val USDWST: Double,
val USDXAF: Double,
val USDXAG: Double,
val USDXAU: Double,
val USDXCD: Double,
val USDXDR: Double,
val USDXOF: Double,
val USDXPF: Double,
val USDYER: Double,
val USDZAR: Double,
val USDZMK: Double,
val USDZMW: Double,
val USDZWL: Double
)
我想知道我在哪里犯了错误我必须做什么才能在 MainActivity.kt
中正确实施网络我只是手动点击 API。
看来问题出在接收类型MutableList<Quotes>
apiInterface.getCurrencies().enqueue(object : Callback <CurrencyResponse> {
override fun onResponse(
call: Call<CurrencyResponse>,
response: Response<CurrencyResponse>
) {
hideProgressBar()
//your logic goes here
}
override fun onFailure(call: Call<CurrencyResponse>, t: Throwable) {
hideProgressBar()
Log.e("error", t.localizedMessage)
}
})
data class CurrencyResponse(
val privacy: String,
val quotes: Quotes,
val source: String,
val success: Boolean,
val terms: String,
val timestamp: Int
)
和val timestamp: Int，你应该这样做
data class CurrencyResponse(
val privacy: String,
val quotes: Quotes,
val source: String,
val success: Boolean,
val terms: String,
val timestamp: Long
)
由于您的 API 结果为 "timestamp": 1610813346，建议将其保存在 Long 类型的变量中。就像我们对 System.currentTimeMillis().