采纳哦
百度API Key申请地址：http://lbsyun.baidu.com/apiconsole/key
创建应用 如图：
提交后得到API Key 如图：
接口实例：http://api.map.baidu.com/telematics/v3/weather？location=南昌&output=json&ak=你的API Key&mcode=你的数字签名SHA1com.example.administrator.jsontest（包名）
接口参数说明
参数类型
参数名称
是否必须
具体描述
String location true 输入城市名或经纬度，城市名如北京或者131，经纬度格式为lng，lat坐标，如：location=116.305145,39.982368全国值为all，返回省会城市自治区，港澳台天气情况多城市天气预报中间用“|”分隔，如：location=116.305145,39.982368|123.342323,36238945|...
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数据格式
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；
返回的JSON数据
{
"error":0,
"status":"success",
"date":"2016-03-05",
"results":[
{
"currentCity":"北京",
"pm25":"144",
"index":[
{
"title":"穿衣",
"zs":"较冷",
"tipt":"穿衣指数",
"des":"建议着厚外套加毛衣等服装。年老体弱者宜着大衣、呢外套加羊毛衫。"},
{
"title":"洗车",
"zs":"不宜",
"tipt":"洗车指数",
"des":"不宜洗车，未来24小时内有扬沙或浮尘，如果在此期间洗车，极易很快蒙上新的灰尘。"},
{
"title":"旅游",
"zs":"一般",
"tipt":"旅游指数",
"des":"风稍大，扬沙或浮尘天气对能见度和空气质量都会有些影响，出行请注意交通安全和采取适当的防尘措施。"},
{
"title":"感冒",
"zs":"易发",
"tipt":"感冒指数",
"des":"昼夜温差大，风力较强，易发生感冒，请注意适当增减衣服，加强自我防护避免感冒。"},
{
"title":"运动",
"zs":"较不宜",
"tipt":"运动指数",
"des":"有扬沙或浮尘，建议适当停止户外运动，选择在室内进行运动，以避免吸入更多沙尘，有损健康。"},
{
"title":"紫外线强度",
"zs":"最弱",
"tipt":"紫外线强度指数",
"des":"属弱紫外线辐射天气，无需特别防护。若长期在户外，建议涂擦SPF在8-12之间的防晒护肤品。"}
],
"weather_data":[
{
"date":"周六 03月05日 (实时：12℃)", "dayPictureUrl":"http://api.map.baidu.com/images/weather/day/fuchen.png",
"nightPictureUrl":"http://api.map.baidu.com/images/weather/night/qing.png",
"weather":"浮尘转晴",
"wind":"北风4-5级",
"temperature":"12 ~ -1℃"},
{
"date":"周日",
"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":"10 ~ -3℃"},
{
"date":"周一", "dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png",
"nightPictureUrl":"http://api.map.baidu.com/images/weather/night/yin.png",
"weather":"多云转阴",
"wind":"微风",
"temperature":"13 ~ 2℃"},
{
"date":"周二", "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":"北风3-4级",
"temperature":"6 ~ -1℃"}
]}]}
3. 我们来写个demo，代码如下：
package com.example.administrator.jsontest
public class MainActivity extends Activity {
private Button button
private TextView textView
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 0:
String re = (String) msg.obj
textView.setText(re)
break
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
button = (Button) findViewById(R.id.button)
textView = (TextView) findViewById(R.id.textView)
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.i("TAG", "点击了Button")
sendRequestWithHttpClient()
}
})
}
private void sendRequestWithHttpClient() {
new Thread(new Runnable() {
@Override
public void run() {
HttpURLConnection connection = null
try {
URL url = new URL("http://api.map.baidu.com/telematics/v3/weather?location=南昌&output=json&ak=8ixCCFzlBB617YX7tONI2P5B&mcode=1C:6B:42:33:E8:A6:DC:A2:11:6E:26:EC:84:BD:42:E3:8E:6B:57:9Acom.example.administrator.jsontest")
connection = (HttpURLConnection) url.openConnection()
connection.setRequestMethod("GET")
connection.setConnectTimeout(5000)
connection.setReadTimeout(5000)
InputStream in = connection.getInputStream()
BufferedReader reader = new BufferedReader(new InputStreamReader(in))
StringBuilder response = new StringBuilder()
String line
while ((line = reader.readLine()) != null) {
response.append(line)
}
Log.i("TAG", response.toString()) parseJSONObjectOrJSONArray(response.toString())
} catch (MalformedURLException e) {
e.printStackTrace()
} catch (IOException e) {
e.printStackTrace()
}
}
}).start()
}
//解析JSON数据
private void parseJSONObjectOrJSONArray(String jsonData) {
try {
String count = ""
JSONObject jsonObject = new JSONObject(jsonData)
JSONArray jsonArray = jsonObject.getJSONArray("results")
if (jsonArray.length() >0) {
JSONObject object = jsonArray.getJSONObject(0)
String city = object.optString("currentCity")
JSONArray array = object.getJSONArray("weather_data")
for (int i = 0i <array.length()i++) {
JSONObject jsonObject1 = array.getJSONObject(i)
String dateDay = jsonObject1.optString("date")
String weather = jsonObject1.optString("weather")
String wind = jsonObject1.optString("wind")
String temperature = jsonObject1.optString("temperature")
count =count +"\n"+ dateDay + " " + weather + " " + wind + " " + temperature
Log.i("AAA",count)
}
Message message = new Message()
message.what = 0
message.obj = count
handler.sendMessage(message)
}
} catch (JSONException e) {
e.printStackTrace()
}
}
}
4. 运行结果如下：
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