android制作一个简单的天气预报

接口说明
根据经纬度/城市名查询天气的结果

接口示例 http://api.map.baidu.com/telematics/v3/weather?location=北京&output=json&ak=yourkey 接口参数说明
参数类型	参数名称	是否必须	具体描述
String	ak	true	开发者密钥
String	sn	false	若用户所用ak的校验方式为sn校验时该参数必须。 （sn生成算法）
String	location	true	输入城市名或经纬度，城市名称如:北京，经纬度格式为lng,lat坐标如: location=116.305145,39.982368;城市天气预报中间"|"分隔,location=116.305145,39.982368| 122.305145,36.982368|….
String	output	false	输出的数据格式，默认为xml格式，当output设置为’json’时，输出的为json格式的数据;
String	coord_type	false	请求参数坐标类型，默认为gcj02经纬度坐标。允许的值为bd09ll、bd09mc、gcj02、wgs84。bd09ll表示百度经纬度坐标，bd09mc表示百度墨卡托坐标，gcj02表示经过国测局加密的坐标。wgs84表示gps获取的坐标。
返回结果
参数名称	含义	说明
currentCity	当前城市	返回城市名
status	返回结果状态信息
date	当前时间	年-月-日
results	天气预报信息	白天可返回近期3天的天气情况（今天、明天、后天）、晚上可返回近期4天的天气情况（今天、明天、后天、大后天）
results.currentCity	当前城市
results.weather_data	weather_data.date	天气预报时间
weather_data.dayPictureUrl	白天的天气预报图片url
weather_data.nightPictureUrl	晚上的天气预报图片url
weather_data.weather	天气状况	所有天气情况（”|”分隔符）：晴|多云|阴|阵雨|雷阵雨|雷阵雨伴有冰雹|雨夹雪|小雨|中雨|大雨|暴雨|大暴雨|特大暴雨|阵雪|小雪|中雪|大雪|暴雪|雾|冻雨|沙尘暴|小雨转中雨|中雨转大雨|大雨转暴雨|暴雨转大暴雨|大暴雨转特大暴雨|小雪转中雪|中雪转大雪|大雪转暴雪|浮尘|扬沙|强沙尘暴|霾
weather_data.wind	风力
weather_data.temperature	温度
返回xml格式的数据
<CityWeatherResponse>
<status>success</status>
<date>2013-07-18</date>
<results>
<currentCity>北京市</currentCity>
<weather_data>
<date>周三(今天, 实时：24℃)</date>
<dayPictureUrl> http://api.map.baidu.com/images/weather/day/duoyun.png </dayPictureUrl>
<nightPictureUrl> http://api.map.baidu.com/images/weather/night/duoyun.png </nightPictureUrl>
<weather>多云</weather>
<wind>微风</wind>
<temperature>23℃~ 15℃</temperature>
<date>周四</date>
<dayPictureUrl> http://api.map.baidu.com/images/weather/day/leizhenyu.png </dayPictureUrl>
<nightPictureUrl> http://api.map.baidu.com/images/weather/night/zhongyu.png </nightPictureUrl>
<weather>雷阵雨转中雨</weather>
<wind>微风</wind>
<temperature>29～22℃</temperature>
<date>周五</date>
<dayPictureUrl> http://api.map.baidu.com/images/weather/day/yin.png </dayPictureUrl>
<nightPictureUrl> http://api.map.baidu.com/images/weather/night/duoyun.png </nightPictureUrl>
<weather>阴转多云</weather>
<wind>微风</wind>
<temperature>31～23℃</temperature>
<date>周六</date>
<dayPictureUrl> http://api.map.baidu.com/images/weather/day/duoyun.png </dayPictureUrl>
<nightPictureUrl> http://api.map.baidu.com/images/weather/night/duoyun.png </nightPictureUrl>
<weather>多云</weather>
<wind>微风</wind>
<temperature>31～24℃</temperature>
</weather_data>
<currentCity>合肥市</currentCity>
<weather_data>
<date>周三</date>
<dayPictureUrl> http://api.map.baidu.com/images/weather/day/duoyun.png </dayPictureUrl>
<nightPictureUrl> http://api.map.baidu.com/images/weather/night/duoyun.png </nightPictureUrl>
<weather>多云</weather>
<wind>东风3-4级</wind>
<temperature>27℃</temperature>
<date>周四</date>
<dayPictureUrl> http://api.map.baidu.com/images/weather/day/duoyun.png </dayPictureUrl>
<nightPictureUrl> http://api.map.baidu.com/images/weather/night/duoyun.png </nightPictureUrl>
<weather>多云</weather>
<wind>东北风3-4级</wind>
<temperature>35～27℃</temperature>
<date>周五</date>
<dayPictureUrl> http://api.map.baidu.com/images/weather/day/duoyun.png </dayPictureUrl>
<nightPictureUrl> http://api.map.baidu.com/images/weather/night/duoyun.png </nightPictureUrl>
<weather>多云</weather>
<wind>南风</wind>
<temperature>35～27℃</temperature>
<date>周六</date>
<dayPictureUrl> http://api.map.baidu.com/images/weather/day/duoyun.png </dayPictureUrl>
<nightPictureUrl> http://api.map.baidu.com/images/weather/night/duoyun.png </nightPictureUrl>
<weather>多云</weather>
<wind>东风</wind>
<temperature>34～27℃</temperature>
</weather_data>
</results>
</CityWeatherResponse>
<weather>阵雨</weather>
<wind>东北风3-4级</wind>
<temperature>18℃</temperature>
</result>
</results>
</CityWeatherResponse>
返回json格式的数据
{
error: 0,
status: "success",
date: "2013-07-17",
results:
[
{
currentCity: "北京市",
weather_data:
[
{
date: "周三(今天, 实时：24℃)",
dayPictureUrl: "http://api.map.baidu.com/images/weather/day/duoyun.png",
nightPictureUrl: "http://api.map.baidu.com/images/weather/night/duoyun.png",
weather: "多云",
wind: "微风",
temperature: "23℃~ 15℃"
},
{
date: "明天（周四）",
dayPictureUrl: "http://api.map.baidu.com/images/weather/day/leizhenyu.png",
nightPictureUrl: "http://api.map.baidu.com/images/weather/night/zhongyu.png",
weather: "雷阵雨转中雨",
wind: "微风",
temperature: "29～22℃"
},
{
date: "后天（周五）",
dayPictureUrl: "http://api.map.baidu.com/images/weather/day/yin.png",
nightPictureUrl: "http://api.map.baidu.com/images/weather/night/duoyun.png",
weather: "阴转多云",
wind: "微风",
temperature: "31～23℃"
},
{
date: "大后天（周六）",
dayPictureUrl: "http://api.map.baidu.com/images/weather/day/duoyun.png",
nightPictureUrl: "http://api.map.baidu.com/images/weather/night/duoyun.png",
weather: "多云",
wind: "微风",
temperature: "31～24℃"
}
]
},
{
currentCity: "合肥市",
weather_data:
[
{
date: "今天（周三）",
dayPictureUrl: "http://api.map.baidu.com/images/weather/day/duoyun.png",
nightPictureUrl: "http://api.map.baidu.com/images/weather/night/duoyun.png",
weather: "多云",
wind: "东风3-4级",
temperature: "27℃"
},
{
date: "明天（周四）",
dayPictureUrl: "http://api.map.baidu.com/images/weather/day/duoyun.png",
nightPictureUrl: "http://api.map.baidu.com/images/weather/night/duoyun.png",
weather: "多云",
wind: "东北风3-4级",
temperature: "35～27℃"
},
{
date: "后天（周五）",
dayPictureUrl: "http://api.map.baidu.com/images/weather/day/duoyun.png",
nightPictureUrl: "http://api.map.baidu.com/images/weather/night/duoyun.png",
weather: "多云",
wind: "南风",
temperature: "35～27℃"
},
{
date: "大后天（周六）",
dayPictureUrl: "http://api.map.baidu.com/images/weather/day/duoyun.png",
nightPictureUrl: "http://api.map.baidu.com/images/weather/night/duoyun.png",
weather: "多云",
wind: "东风",
temperature: "34～27℃"
}
]
}
]
}

package com.example.textview1;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.util.EntityUtils;
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.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
private static final int MSG_WEATHERCHG = 1;
private TextView txt_weather_city;
private TextView txt_weather_temp;
private TextView txt_weather_detail;
private TextView txt_weather_date;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt_weather_city = (TextView) findViewById(R.id.text_city);
txt_weather_temp = (TextView) findViewById(R.id.text_temp);
txt_weather_detail = (TextView) findViewById(R.id.text_weather);
txt_weather_date = (TextView) findViewById(R.id.text_date);
weatherThread.start();
}

public String getWebContent(String url) {
// create http request.
HttpGet request = new HttpGet(url);
// create HttpParams.
HttpParams params = new BasicHttpParams();
// set timeout params.
HttpConnectionParams.setConnectionTimeout(params, 3000);
HttpConnectionParams.setSoTimeout(params, 5000);
// create httpclient object.
HttpClient httpClient = new DefaultHttpClient(params);
try {
// get request response.
HttpResponse response = httpClient.execute(request);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
//return content.
String content = EntityUtils.toString(response.getEntity());
return content;
}
else
{
//warning connect fail.
Toast.makeText(getApplicationContext(),
getResources().getString(
R.string.connected_fails), Toast.LENGTH_SHORT).show();
}

}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
httpClient.getConnectionManager().shutdown();
}
return null;
}

public Thread weatherThread = new Thread()
{
@Override
public void run() {
String weatherUrl = "http://api.map.baidu.com/telematics/v3/weather?location=北京&output=json&ak=k68xO83yR6Vx33sdgrcs1";
String weatherJson = getWebContent(weatherUrl);
Log.i("TAG", weatherJson);

try {
JSONObject jsonObject = new JSONObject(weatherJson);
String date = jsonObject.getString("date");//date.
JSONArray resultArray = jsonObject.getJSONArray("results");
JSONObject resultsObj = resultArray.getJSONObject(0);
String currentcity = resultsObj.getString("currentCity");//current cityname.
JSONArray weatherArray = resultsObj.getJSONArray("weather_data");
JSONObject weatherObj = weatherArray.getJSONObject(0);

WeatherInfo weatherinfo = new WeatherInfo();
weatherinfo.sdate = date;
weatherinfo.scity = currentcity;
weatherinfo.weather = weatherObj;

Message message = new Message();
message.obj = weatherinfo;
message.what = MSG_WEATHERCHG;
weatherhandler.sendMessage(message);
Thread.sleep(3000);

} catch (JSONException e) {
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

};

class WeatherInfo{
public String sdate;
public String scity;
public JSONObject weather;

}

private Handler weatherhandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case MSG_WEATHERCHG:
{
WeatherInfo object = (WeatherInfo) msg.obj;
try {
txt_weather_city.setText(object.scity);
txt_weather_temp.setText(object.weather.getString("temperature"));
txt_weather_detail.setText(object.weather.getString("weather"));
txt_weather_date.setText(object.sdate);
} catch (Exception e) {
e.printStackTrace();
}

}
break;

default:
break;
}
}
};

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000">

<TextView
android:id="@+id/city"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center"
android:text="城市名:"
android:textSize="16sp"
android:textColor="#ffffff"/>

<TextView
android:id="@+id/text_city"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center"
android:layout_toRightOf="@+id/city"
android:layout_marginLeft="20dp"
android:text="city"
android:textSize="16sp"
android:textColor="#ffffff"/>

<TextView
android:id="@+id/temp"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center"
android:layout_below="@+id/city"
android:text="温 度:"
android:textSize="16sp"
android:textColor="#ffffff"/>

<TextView
android:id="@+id/text_temp"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center"
android:layout_toRightOf="@+id/temp"
android:layout_alignLeft="@+id/text_city"
android:layout_below="@+id/text_city"
android:text="temperature"
android:textSize="16sp"
android:textColor="#ffffff"/>

<TextView
android:id="@+id/weather"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:gravity="center"
android:layout_below="@+id/temp"
android:text="天 气:"
android:textSize="16sp"
android:textColor="#ffffff"/>

<TextView
android:id="@+id/text_weather"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_toRightOf="@+id/weather"
android:layout_alignLeft="@+id/text_temp"
android:layout_below="@+id/text_temp"
android:gravity="center"
android:text="weather"
android:textColor="#ffffff"
android:textSize="16sp" />

<TextView
android:id="@+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/weather"
android:layout_marginTop="17dp"
android:text="时 间:"
android:textColor="#ffffff"
android:textSize="16sp"/>

<TextView
android:id="@+id/text_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/date"
android:layout_alignBottom="@+id/date"
android:layout_alignLeft="@+id/text_weather"
android:text="time"
android:textColor="#ffffff"
android:textSize="16sp" />

</RelativeLayout>