[Android/Java] 날씨 api

Demo

0. api 등록 

https://openweathermap.org/api

1. 가입

2. my api key에서 key 복사

3. 맘에 드는 api 쓰면 된다.

 

1. 구성

• dependency
• permission
• network-security-config
• activity
• layout

 

Dependency 추가

implementation 'com.android.volley:volley:1.1.1'

 

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.recyclerview">

    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <application
        android:networkSecurityConfig="@xml/network_security_config"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.RecyclerView">
        <activity android:name=".MainActivity"
            android:theme="@style/Theme.AppCompat.NoActionBar"
            >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

 

MainActivity.java

package com.example.recyclerview;

import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.text.DecimalFormat;

public class MainActivity extends AppCompatActivity {
    private EditText etCity, etCountry;
    private TextView tvResult;
    private final String url = "http://api.openweathermap.org/data/2.5/weather";
    private final String appid = "ea33671fc852a581e32410d45bed8052";
    private DecimalFormat df = new DecimalFormat("#.##");

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

        etCity = findViewById(R.id.et_city);
        etCountry = findViewById(R.id.et_country);
        tvResult = findViewById(R.id.tv_result);
    }

    public void getWeatherDetails(View view) {
        String tempUrl = "";
        String city = etCity.getText().toString().trim();
        String country = etCountry.getText().toString().trim();
        if(city.equals("")) {
            tvResult.setText("City field  can not be empty!");
        } else {
            if(!country.equals("")){
                tempUrl = url + "?q=" + city + "," + country + "&appid=" +appid;
            } else {
                tempUrl = url + "?q=" + city + "&appid=" +appid;
            }
            StringRequest stringRequest = new StringRequest(Request.Method.POST, tempUrl, new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    Log.d("response>>>>>>>", response);
                    //json data 하나하나 꺼내는건데 이게 의미가 있는지 모르겟다
                    String output = "";
                    try {
                        JSONObject jsonResponse = new JSONObject(response);

                        JSONArray jsonArray = jsonResponse.getJSONArray("weather");
                        JSONObject jsonObjectWeather = jsonArray.getJSONObject(0);
                        String description = jsonObjectWeather.getString("description");

                        JSONObject jsonObjectMain = jsonResponse.getJSONObject("main");
                        double temp = jsonObjectMain.getDouble("temp") - 273.15;
                        double feelsLike = jsonObjectMain.getDouble("feels_like") - 273.15;
                        float pressure = jsonObjectMain.getInt("pressure");
                        int humidity = jsonObjectMain.getInt("humidity");

                        JSONObject jsonObjectWind = jsonResponse.getJSONObject("wind");
                        String wind = jsonObjectWind.getString("speed");

                        JSONObject jsonObjectCloud = jsonResponse.getJSONObject("clouds");
                        String clouds = jsonObjectCloud.getString("all");

                        JSONObject jsonObjectSys = jsonResponse.getJSONObject("sys");
                        String countryName = jsonObjectSys.getString("country");
                        String cityName = jsonResponse.getString("name");

                        output += "Current weather of " + cityName + " (" + countryName + ")"
                                + "\n Temp: " + df.format(temp) + " 도"
                                + "\n Feels LIke: " + df.format(feelsLike) + " 도"
                                + "\n Humidity: " + humidity + "%"
                                + "\n Description: " + description
                                + "\n Wind Speed: " + wind + "m/s (meters per second)"
                                + "\n Cloudiness: " + clouds + "%"
                                + "\n Pressure: " + pressure + "hPa";
                        tvResult.setText(output);
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    //Log.d("error>>>>>>>", error.toString());
                }
            });
            RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
            requestQueue.add(stringRequest);
        }
    }
}

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    android:padding="16dp">

  <TextView
      android:id="@+id/text_view_01"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Weather Update"
      android:layout_gravity="center"
      android:textSize="32dp"/>

  <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:gravity="center"
      android:orientation="vertical">
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/et_city"
        android:layout_marginBottom="10dp"
        android:hint="Enter City Name"
        android:inputType="textPersonName"/>
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/et_country"
        android:layout_marginBottom="10dp"
        android:hint="Enter Country Code"
        android:inputType="textPersonName"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/btn_get"
        android:layout_marginBottom="10dp"
        android:onClick="getWeatherDetails"
        android:text="Get"
        android:backgroundTint="@null"/>
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="150dp">
      <TextView
          android:id="@+id/tv_result"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"/>
    </ScrollView>
  </LinearLayout>
</LinearLayout>

 

/res/xml/network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true"/>
</network-security-config>