Android解析聚合数据之天气预报

免费天气预报API：https://www.juhe.cn/docs/api/id/73 ，申请APPKEY

MainActivity.java

<span style="font-size:14px;">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();

        }

    }

}</span>

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical" >

    <Button

        android:id="@+id/send_request"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Send Request" />

    <ScrollView

        android:layout_width="match_parent"

        android:layout_height="match_parent" >

        <TextView

            android:id="@+id/response"

            android:layout_width="match_parent"

            android:layout_height="wrap_content" />

    </ScrollView>

</LinearLayout>