使用OpenWeatherMap API密钥

Question

我得到例外"http://api.openweathermap.org/data/2.5/weather?q=Sydney“。有人能帮忙如何使用它吗。粘贴以下内容时，web浏览器可以正常工作

http://api.openweathermap.org/data/2.5/weather?q=Sydney&APPID=ea574594b9d36ab688642d5fbeab847e

我也尝试了下面的组合，但是没有运气。

connection.addRequestProperty("x-api-key",
                    "&APPID=cea574594b9d36ab688642d5fbeab847e");


private static final String OPEN_WEATHER_MAP_API =
        "http://api.openweathermap.org/data/2.5/weather?q=%s";


public static JSONObject getJSON(String city) {
    try {
        URL url = new URL(String.format(OPEN_WEATHER_MAP_API, city));

        HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        connection.addRequestProperty("x-api-key",
                "cea574594b9d36ab688642d5fbeab847e");

        BufferedReader reader =
                new BufferedReader(new InputStreamReader(connection.getInputStream()));

        StringBuffer json = new StringBuffer(1024);
        String tmp = "";

        while((tmp = reader.readLine()) != null)
            json.append(tmp).append("\n");
        reader.close();

        JSONObject data = new JSONObject(json.toString());

        if(data.getInt("cod") != 200) {
            System.out.println("Cancelled");
            return null;
        }

        return data;
    } catch (Exception e) {

        System.out.println("Exception "+ e.getMessage());
        return null;
    }  

Answer 1

1.-在应用程序How to add manifest permission to android application?上添加internet权限

2.-这里有一个如何实现api调用的示例

 public class MainActivity extends Activity {

    JSONObject data = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getJSON("Sydney");
    }

    public void getJSON(final String city) {

        new AsyncTask<Void, Void, Void>() {


            @Override
            protected void onPreExecute() {
                super.onPreExecute();

            }

            @Override
            protected Void doInBackground(Void... params) {
                try {
                    URL url = new URL("http://api.openweathermap.org/data/2.5/weather?q="+city+"&APPID=ea574594b9d36ab688642d5fbeab847e");

                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();

                    BufferedReader reader =
                            new BufferedReader(new InputStreamReader(connection.getInputStream()));

                    StringBuffer json = new StringBuffer(1024);
                    String tmp = "";

                    while((tmp = reader.readLine()) != null)
                        json.append(tmp).append("\n");
                    reader.close();

                    data = new JSONObject(json.toString());

                    if(data.getInt("cod") != 200) {
                        System.out.println("Cancelled");
                        return null;
                    }


                } catch (Exception e) {

                    System.out.println("Exception "+ e.getMessage());
                    return null;
                }

                return null;
            }

            @Override
            protected void onPostExecute(Void Void) {
            if(data!=null){
                Log.d("my weather received",data.toString());
            }

            }
        }.execute();

    }
}

​

​

Answer 2

看来开放天气可能遇到了问题。我这么说是因为他们给出的例子是返回与您相同的错误消息。从他们的网站>> http://openweathermap.org/appid

API调用示例(没有有效密钥)：

api.openweathermap.org/data/2.5/forecast/city?id=524901&APPID=1111111111

Answer 3

尝尝这个

1. 创建一个名为GetData的类 类GetData扩展AsyncTask < String，Void，String> {@重载受保护的字符串doInBackground(字符串.( params) { // TODO自动生成的方法存根字符串结果= ""；HttpURLConnection conn =空；尝试{ url URL =新URL("http://api.openweathermap.org/data/2.5/weather?q="+URLEncoder.encode(params[0]，HttpURLConnection conn = (HttpURLConnection) url.openConnection()；InputStream in =新BufferedInputStream(conn.getInputStream())；如果(in = null) { BufferedReader bufferedReader =新BufferedReader(新的InputStreamReader(in))；字符串行= ""；while ((line = bufferedReader.readLine()) != null)结果+=行；} in.close()；返回结果；} catch (IOException e) { // TODO自动生成的catch块e.printStackTrace()；}最后{ if(conn!=null) conn.disconnect()；}返回结果；}@覆盖受保护的无效onPostExecute(字符串结果){ // TODO自动生成的方法存根super.onPostExecute(结果)；Toast.makeText(getApplicationContext()，result，Toast.LENGTH_LONG).show()；}}
2. 然后用这个来获取数据 new Getdata().execute("your city or country");