Null 响应 okhttp3

Question

所以我将此 class 编码为下载 URL，但它返回 Null 响应我试图调试但什么都不懂

package com.example.instaup;
import org.jetbrains.annotations.NotNull;
import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class Downloader
{
    private String myResponse;

    public String DownloadText(String url)
    {
            OkHttpClient client = new OkHttpClient();
            Request request = new Request.Builder()
                    .url(url)
                    .build();
            client.newCall(request).enqueue(new Callback() {
                @Override
                public void onFailure(@NotNull Call call, @NotNull IOException e) {
                    e.printStackTrace();
                }
                @Override
                public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
                    if (response.isSuccessful()) {
                        myResponse = response.body().toString();
                    }
                }
            });
        return myResponse;
    }
}

有人能帮我吗？ 我对此有点陌生

Answer 1

您应该重用客户端，并使用同步表单execute而不是排队回调 API，后者几乎在请求完成之前立即返回。

import java.io.IOException;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class Downloader {
  OkHttpClient client = new OkHttpClient();

  public String DownloadText(String url) throws IOException {
    Request request = new Request.Builder().url(url).build();
    try (Response myResponse = client.newCall(request).execute()) {
      return myResponse.body().string();
    }
  }
}