1.Android的天气预报的应用还是挺多的，基于JSON和WebServ的均可。首先我们来介绍基于JSON解析的天气预报的开发

2.这需要寻找到合适的数据源。这里使用的是http://www.weather.com.cn/（中央气象局）的数据信息。可通过m.weather.com.cn/data/101010100.html或者www.weather.com.cn/data/cityinfo/101010100.html。

查看到北京的天气信息

3.接下来就是对JSON数据的解析

```

package com.cater.weather;

import java.io.IOException;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.util.EntityUtils;

import org.json.JSONException;

import org.json.JSONObject;

import android.app.Activity;

import android.os.Bundle;

import android.widget.EditText;

import android.widget.TextView;

public class WeatherReportActivity extends Activity

{

private final static String url = "http://m.weather.com.cn/data/101010100.html";

private HttpClient httpClient;

private HttpResponse httpResponse;

private HttpGet httpGet;

private EditText editText;

private TextView textView;

private String today;

private String dayofweek;

private String city;

private int ftime;

private String template;

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

editText = (EditText) findViewById(R.id.editText1);

textView = (TextView) findViewById(R.id.textView1);

httpClient = new DefaultHttpClient();

parseString(getRequest(url));

editText.setText(getRequest(url));

textView.setText("城市：" + city + "\n"

+"温度：" + template + "\n"

+"星期：" + dayofweek + "\n"

+"时间：" + ftime + "\n"

+"日期：" + today + "\n");

}

private String getRequest(String uri)

{

httpGet = new HttpGet(uri);

String result = "";

try

{

httpResponse = httpClient.execute(httpGet);

if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK)

{

result = EntityUtils.toString(httpResponse.getEntity());

return result;

}

}

catch (ClientProtocolException e)

{

e.printStackTrace();

}

catch (IOException e)

{

e.printStackTrace();

}

return null;

}

private String parseString(String str)

{

try

{

JSONObject jsonObject = new JSONObject(str).getJSONObject("weatherinfo");

today = jsonObject.getString("date_y");

dayofweek = jsonObject.getString("week");

city = jsonObject.getString("city");

ftime = jsonObject.getInt("fchh");

template = jsonObject.getString("temp1");

}

catch (JSONException e)

{

e.printStackTrace();

}

return null;

}

}

```