如何使用Android聚合数据实现天气预报

这篇文章主要介绍"如何使用Android聚合数据实现天气预报"，在日常操作中，相信很多人在如何使用Android聚合数据实现天气预报问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"如何使用Android聚合数据实现天气预报"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

MainActivity.java

package com.example.networktest;  import java.io.BufferedReader;  import java.io.IOException;  import java.io.InputStream;  import java.io.InputStreamReader;  import java.net.HttpURLConnection;  import java.net.MalformedURLException;  import java.net.URL;  import java.net.URLEncoder;  import org.json.JSONArray;  import org.json.JSONException;  import org.json.JSONObject;  import android.app.Activity;  import android.os.Bundle;  import android.os.Handler;  import android.os.Message;  import android.util.Log;  import android.view.View;  import android.view.View.OnClickListener;  import android.widget.Button;  import android.widget.TextView;  public class MainActivity extends Activity {      private Button sendRequest;      private TextView responseText;      public static final int SHOW_RESPONSE = 0;      private Handler handler = new Handler() {          public void handleMessage(Message msg) {              switch (msg.what) {              case SHOW_RESPONSE:                  String response = (String) msg.obj;                  // 在这里进行UI操作，将结果显示到界面上                  responseText.setText(response);              }          }      };      @Override     protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          sendRequest = (Button) findViewById(R.id.send_request);          responseText = (TextView) findViewById(R.id.response);          sendRequest.setOnClickListener(new OnClickListener() {              @Override             public void onClick(View arg0) {                  sendRequestWithHttpURLConnection();              }          });      }      protected void sendRequestWithHttpURLConnection() {          new Thread() {              @Override             public void run() {                  URL url;                  HttpURLConnection connection = null;                  try {                      // url = new                      // URL("http://10.2.5.119:8080/Server/getData.json");                      String cityName = URLEncoder.encode("滨州", "utf-8");                      url = new URL(                              "http://v.juhe.cn/weather/index?format=2&cityname="                                     + cityName                                      + "&key=ab9d7e2007472d723baf71fcdc4ba094");                      connection = (HttpURLConnection) url.openConnection();                      connection.setRequestMethod("GET");                      connection.setConnectTimeout(8000);                      connection.setReadTimeout(8000);                      InputStream in = connection.getInputStream();                      // 下面对获取到的输入流进行读取                      BufferedReader reader = new BufferedReader(                              new InputStreamReader(in));                      StringBuilder response = new StringBuilder();                      String line;                      while ((line = reader.readLine()) != null) {                          response.append(line);                      }                      System.out.println("response=" + response.toString());                      //parseWithJSON(response.toString());                      parseWeatherWithJSON(response.toString());                      Message message = new Message();                      message.what = SHOW_RESPONSE;                      // 将服务器返回的结果存放到Message中                      message.obj = response.toString();                      handler.sendMessage(message);                  } catch (MalformedURLException e) {                      e.printStackTrace();                  } catch (IOException e) {                      e.printStackTrace();                  } finally {                      if (connection != null) {                          connection.disconnect();                      }                  }              }          }.start();      }      protected void parseWeatherWithJSON(String response) {          try {              JSONObject jsonObject=new JSONObject(response);              String resultcode=jsonObject.getString("resultcode");              if(resultcode.equals("200")){                  JSONObject resultObject=jsonObject.getJSONObject("result");                  JSONObject todayObject=resultObject.getJSONObject("today");                  String date_y=todayObject.getString("date_y");                  String week=todayObject.getString("week");                  String temperature=todayObject.getString("temperature");                  Log.d("MainActivity", "date_y="+date_y+"week="+week+"temp="+temperature);              }          } catch (JSONException e) {              e.printStackTrace();          }      }      protected void parseWithJSON(String response) {          try {              JSONArray jsonArray = new JSONArray(response);              for (int i = 0; i < jsonArray.length(); i++) {                  JSONObject jsonObject = jsonArray.getJSONObject(i);                  String id = jsonObject.getString("id");                  String name = jsonObject.getString("name");                  String version = jsonObject.getString("version");                  Log.d("MainActivity", "id=" + id + "name=" + name + "version="                         + version);              }          } catch (JSONException e) {              e.printStackTrace();          }      }  }

activity_main.xml

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