中国和世界天气全能版 API接受到的json字符串为空 求大神解决

[拾荒者101]

package com.example.dell_.weather;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    String httpUrl = "http://apis.baidu.com/heweather/pro/attractions";
    String httpArg = "cityid=CN10101010018A";

    public static String request(String httpUrl, String httpArg) {
        BufferedReader reader = null;
        String result = null;
        StringBuffer sbf = new StringBuffer();
        httpUrl = httpUrl + "?" + httpArg;

        try {
            URL url = new URL(httpUrl);
            HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();
            connection.setRequestMethod("GET");
            // 填入apikey到HTTP header
            connection.setRequestProperty("apikey",  "63768771fba86cb8f45097013d35074e");
            connection.connect();
            InputStream is = connection.getInputStream();
            reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
            String strRead = null;
            while ((strRead = reader.readLine()) != null) {
                sbf.append(strRead);
                sbf.append("\r\n");
            }
            reader.close();
            result = sbf.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }


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

    @Override
    protected void onStart() {
        super.onStart();
        Button button = (Button) this.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String jsonResult = request(httpUrl, httpArg);
                Log.i("test","1111"+jsonResult);
            }
        });
    }
}

[Intboy]

public class HttpGetWeather
{
    private static final Log LOGGER = LogFactory.getLog(HttpGetWeather.class);

    public static void main(String[] args) throws Exception
    {
        String url = "http://apis.baidu.com/heweather/pro/attractions";
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        NameValuePair params1 = new BasicNameValuePair("cityid", "CN10101010018A");
        params.add(params1);
        // for version 4.3+
        HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
        CloseableHttpClient httpClient = httpClientBuilder.build();

        // HttpClient httpClient = new DefaultHttpClient();
        // 连接时间
        // httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,
        // connectionTimeout);
        // 数据传输时间
        // httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,
        // soTimeout);
        
        // Get请求
        HttpGet httpget = new HttpGet(url);
        try
        {
            // for version 4.3+ 设置请求和传输超时时间
            RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000)
                    .setConnectTimeout(2000).build();
            httpget.setConfig(requestConfig);

            // 设置参数
            String str = EntityUtils.toString(new UrlEncodedFormEntity(params, Charset
                    .forName("UTF-8")));
            httpget.setURI(new URI(httpget.getURI().toString() + "?" + str));
            httpget.setHeader("apikey", "63768771fba86cb8f45097013d35074e");
            // 发送请求
            HttpResponse httpResponse = httpClient.execute(httpget);

            int statusCode = httpResponse.getStatusLine().getStatusCode();
            if (statusCode != HttpStatus.SC_OK)
            {
                LOGGER.error("Method failed:" + httpResponse.getStatusLine());
            }

            // 获取返回数据
            HttpEntity entity = httpResponse.getEntity();
            String body = EntityUtils.toString(entity, Charset.forName("UTF-8"));
            if (entity != null)
            {
                EntityUtils.consume(entity);
            }
            System.out.println(body);
        } catch (ParseException e)
        {
            throw e;
        } catch (UnsupportedEncodingException e)
        {
            throw e;
        } catch (IOException e)
        {
            throw e;
        } catch (URISyntaxException e)
        {
            throw e;
        } finally
        {
            try
            {
                // for 4.3+
                httpClient.close();
            } catch (IOException e)
            {
                e.printStackTrace();
            }
            // httpget.releaseConnection();
            // httpClient.getConnectionManager().shutdown();
        }
    }
}

试试

[Intboy]

工具测试结果正常。
结果数据如下：

{
  "HeWeather data service 3.0": [
    {
      "basic": {
        "city": "故宫博物院",
        "cnty": "中国",
        "id": "CN10101010018A",
        "lat": "116.39",
        "lon": "39.91",
        "update": {
          "loc": "2016-03-02 10:10",
          "utc": "2016-03-02 02:10"
        }
      },
      "daily_forecast": [
        {
          "astro": {
            "sr": "06:45",
            "ss": "18:07"
          },
          "cond": {
            "code_d": "101",
            "code_n": "101",
            "txt_d": "多云",
            "txt_n": "多云"
          },
          "date": "2016-03-02",
          "tmp": {
            "max": "17",
            "min": "3"
          },
          "wind": {
            "dir": "南风",
            "sc": "微风"
          }
        },
        {
          "astro": {
            "sr": "06:44",
            "ss": "18:08"
          },
          "cond": {
            "code_d": "101",
            "code_n": "305",
            "txt_d": "多云",
            "txt_n": "小雨"
          },
          "date": "2016-03-03",
          "tmp": {
            "max": "15",
            "min": "4"
          },
          "wind": {
            "dir": "东北风",
            "sc": "微风"
          }
        },
        {
          "astro": {
            "sr": "06:42",
            "ss": "18:09"
          },
          "cond": {
            "code_d": "104",
            "code_n": "101",
            "txt_d": "阴",
            "txt_n": "多云"
          },
          "date": "2016-03-04",
          "tmp": {
            "max": "19",
            "min": "3"
          },
          "wind": {
            "dir": "西南风",
            "sc": "微风"
          }
        },
        {
          "astro": {
            "sr": "06:40",
            "ss": "18:10"
          },
          "cond": {
            "code_d": "101",
            "code_n": "101",
            "txt_d": "多云",
            "txt_n": "多云"
          },
          "date": "2016-03-05",
          "tmp": {
            "max": "11",
            "min": "0"
          },
          "wind": {
            "dir": "西北风",
            "sc": "微风"
          }
        },
        {
          "astro": {
            "sr": "06:39",
            "ss": "18:11"
          },
          "cond": {
            "code_d": "101",
            "code_n": "101",
            "txt_d": "多云",
            "txt_n": "多云"
          },
          "date": "2016-03-06",
          "tmp": {
            "max": "9",
            "min": "-2"
          },
          "wind": {
            "dir": "东风",
            "sc": "微风"
          }
        },
        {
          "astro": {
            "sr": "06:37",
            "ss": "18:12"
          },
          "cond": {
            "code_d": "101",
            "code_n": "101",
            "txt_d": "多云",
            "txt_n": "多云"
          },
          "date": "2016-03-07",
          "tmp": {
            "max": "8",
            "min": "-1"
          },
          "wind": {
            "dir": "北风",
            "sc": "微风"
          }
        },
        {
          "astro": {
            "sr": "06:36",
            "ss": "18:13"
          },
          "cond": {
            "code_d": "101",
            "code_n": "101",
            "txt_d": "多云",
            "txt_n": "多云"
          },
          "date": "2016-03-08",
          "tmp": {
            "max": "8",
            "min": "0"
          },
          "wind": {
            "dir": "北风",
            "sc": "微风"
          }
        }
      ],
      "status": "ok"
    }
  ]
}

[tony4geek]

直接用这个。