Android解析聚合数据之天气预报

Android解析聚合数据之天气预报

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>