在Android中通过改造获取对象数组

我在我的localhost中运行了一个服务器，其中包含我希望在我的Android应用程序中显示的数据库中的一些信息，我正在使用改造库来执行此操作，但我只收到此消息：

从API加载错误

这是我的RetrofitClient：

公共类RetrofitClient {

private static Retrofit retrofit = null;

public static Retrofit getClient(String baseUrl) {
    if (retrofit==null) {
        retrofit = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
    return retrofit;
}

}

这是我的GET方法的类：

public interface SOService {

    @GET("stocks/")
Call<List<Stock>> getStocks();

}

这是我的类与网址以及如何连接：

public class ApiUtils {

    public static final String BASE_URL = "http://127.0.0.1:8000";

    public static SOService getSOService() {
        return RetrofitClient.getClient(BASE_URL).create(SOService.class);
    }
}

这是我最终尝试获取信息的地方：

public class RegisterActivity extends AppCompatActivity {

    private Button registerButton;
    private SOService mService;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        mService = ApiUtils.getSOService();

        registerButton = findViewById(R.id.register_button);
        registerButton.setOnClickListener(v -> loadAnswers());
    }

    public void loadAnswers() {

        System.out.println("Entro aquí");
        mService.getStocks().enqueue(new Callback<List<Stock>>() {
        @Override
        public void onResponse(Call<List<Stock>> call, Response<List<Stock>> response) {
            if(response.isSuccessful()) {

                System.out.println("Te lo imprimo");
                System.out.println(response.body().toString());
                Log.d("MainActivity", "posts loaded from API");
            }else {
                int statusCode  = response.code();
                // handle request errors depending on status code
            }
        }

        @Override
        public void onFailure(Call<List<Stock>> call, Throwable t) {
            Log.d("MainActivity", "error loading from API");

        }
    });
    }
}

我上课了这样的股票：

public class Stock {

    @SerializedName("id")
    @Expose
    private Integer id;
    @SerializedName("ticker")
    @Expose
    private String ticker;
    @SerializedName("open")
    @Expose
    private Double open;
    @SerializedName("close")
    @Expose
    private Double close;
    @SerializedName("volume")
    @Expose
    private Integer volume;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getTicker() {
        return ticker;
    }

    public void setTicker(String ticker) {
        this.ticker = ticker;
    }

    public Double getOpen() {
        return open;
    }

    public void setOpen(Double open) {
        this.open = open;
    }

    public Double getClose() {
        return close;
    }

    public void setClose(Double close) {
        this.close = close;
    }

    public Integer getVolume() {
        return volume;
    }

    public void setVolume(Integer volume) {
        this.volume = volume;
    }

}

知道为什么它不起作用吗？

这是我得到的错误：

W / System.err：java.net.ConnectException：无法连接到okhttp3.internal.connection.RealConnection.connectSocket（RealConnection.java:242）上的/127.0.0.1:8000 W / System.err：at okhttp3.internal在okhttp3的okhttp3.internal.connection.StreamAllocation.findHealthyConnection（StreamAllocation.java:135）的okhttp3.internal.connection.StreamAllocation.findConnection（StreamAllocation.java:257）中的.connection.RealConnection.connect（RealConnection.java:160） . internal.connection.StreamAllocation.newStream（StreamAllocation.java:114）at okhttp3.internal.connection.ConnectInterceptor.intercept（ConnectInterceptor.java:42）W / System.err：at okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain . java：147）在okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:121）W / System.err：在okhttp3.internal.http的okhttp3.internal.cache.CacheInterceptor.intercept（CacheInterceptor.java:93） .halInterceptorChain.proceed（RealInterceptorChain.java:147）在okhttp3.internal . http.RealInterceptorChain.proceed（RealInterceptorChain.java:121）okhttp3.internal.http.BridgeInterceptor.intercept（BridgeInterceptor.java:93）okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:147）okhttp3.internal位于okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:147）的okhttp3.internal.http.RealInterceptorChain.proceed（RealInterceptorChain.java:121）W / System中的.http.RetryAndFollowUpInterceptor.intercept（RetryAndFollowUpInterceptor.java:126） .err：在okhttp3.RealCall.getResponseWithInterceptorChain（RealCall.java:200）的okhttp3.RealCall $ AsyncCall.execute（RealCall.java:147），位于java.util的okhttp3.internal.NamedRunnable.run（NamedRunnable.java:32） .concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1162）at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:636）at java.lang.Thread.run（Thread.java:764)W / System .err：引起：java.net.ConnectException：无法连接到/127.0.0.1（端口8000）来自/127.0.0.1（端口42532）10000ms之后：isConnected失败：在libcore.io.IoBridge.isConnected（IoBridge.java:273）的libcore.io.IoBridge.connectErrno（IoBridge.java：）下ECONNREFUSED（连接被拒绝） 188）在java.net的java.net.AbstractPlainSocketImpl.doConnect（AbstractPlainSocketImpl.java:356）的java.net.PlainSocketImpl.socketConnect（PlainSocketImpl.java:129）上的libcore.io.IoBridge.connect（IoBridge.java:130） . java.net.SocksSocketImpl.connect（SocksSocketImpl.java:356）中java.net.AbstractPlainSocketImpl.connect（AbstractPlainSocketImpl.java:182）中的net.AbstractPlainSocketImpl.connectToAddress（AbstractPlainSocketImpl.java:200）W / System.err：at java .net.Socket.connect（Socket.java:616）在okhttp3.internal.platform.AndroidPlatform.connectSocket（AndroidPlatform.java:71）的okhttp3.internal.connection.RealConnection.connectSocket（RealConnection.java:240）... 21更多引起：android.system.ErrnoException：isConnected失败：ECONNREFUSED（连接被拒绝）W / System.err：at libcore.i o.IoBridge.isConnected（IoBridge.java:262）......还有31个