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udacity의 햇빛 앱 프로젝트를 사용하여 날씨 앱을 만들고 있는데, 사용자의 현재 위치를 기반으로 날씨를 업데이트합니다. 현재 위치를 기본값으로 설정하고 싶습니다. 사용자가 환경 설정에서 그것을 변경하게하십시오. 사용자가 환경 설정에서 위치를 변경하지 않으면 기본적으로 위치를 감지하고 설정합니다. 위치 관리자를 사용하고 환경 설정에서 기본값을 설정하고 있습니다. 문제는 둘 다 다른 범위를가집니다. 이것은 코드 단편입니다 preferecnces의.오버라이드 기능에서 변수에 액세스하여 다른 기능에서 사용하기
public static String getPreferredLocation(Context context) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
return prefs.getString(context.getString(R.string.pref_location_key),
context.getString(R.string.pref_location_default));
}
그리고 내가
public void onLocationChanged(Location loc) {
String longitude = "Longitude: " + loc.getLongitude();
Log.v(TAG, longitude);
String latitude = "Latitude: " + loc.getLatitude();
Log.v(TAG, latitude);
String cityName = null;
Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
List<Address> addresses;
try {
addresses = gcd.getFromLocation(loc.getLatitude(),
loc.getLongitude(), 1);
if (addresses.size() > 0) {
System.out.println(addresses.get(0).getLocality());
cityName = addresses.get(0).getLocality();
}
}
catch (IOException e) {
e.printStackTrace();
}
}
내가 할 수없는 내가 onLoctionChanged 쓸만 외부 CityName이 액세스 할 수 없습니다 cityname.But와 pref_location_default를 교체하려는 현재의 도시 이름을 얻을 수 locationlistener을 사용하고 곳이다 그것은 preferedlocation default.These에서 모두 같은 클래스에서 구현됩니다, 여기에 클래스의 전체 코드입니다.
Utility.java
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.format.Time;
import android.util.Log;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import static android.content.ContentValues.TAG;
public class Utility extends Activity implements LocationListener {
public static final String DATE_FORMAT = "yyyyMMdd";
public static String getPreferredLocation(Context context) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
return prefs.getString(context.getString(R.string.pref_location_key),
context.getString(R.string.pref_location_default));
}
public static boolean isMetric(Context context) {
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
return prefs.getString(context.getString(R.string.pref_units_key),
context.getString(R.string.pref_units_metric))
.equals(context.getString(R.string.pref_units_metric));
}
public static String formatTemperature(Context context, double temperature) {
// Data stored in Celsius by default. If user prefers to see in Fahrenheit, convert
// the values here.
String suffix = "\u00B0";
if (!isMetric(context)) {
temperature = (temperature * 1.8) + 32;
}
// For presentation, assume the user doesn't care about tenths of a degree.
return String.format(context.getString(R.string.format_temperature), temperature);
}
static String formatDate(long dateInMilliseconds) {
Date date = new Date(dateInMilliseconds);
return DateFormat.getDateInstance().format(date);
}
/**
* Helper method to convert the database representation of the date into something to display
* to users. As classy and polished a user experience as "20140102" is, we can do better.
*
* @param context Context to use for resource localization
* @param dateInMillis The date in milliseconds
* @return a user-friendly representation of the date.
*/
public static String getFriendlyDayString(Context context, long dateInMillis) {
// The day string for forecast uses the following logic:
// For today: "Today, June 8"
// For tomorrow: "Tomorrow"
// For the next 5 days: "Wednesday" (just the day name)
// For all days after that: "Mon Jun 8"
Time time = new Time();
time.setToNow();
long currentTime = System.currentTimeMillis();
int julianDay = Time.getJulianDay(dateInMillis, time.gmtoff);
int currentJulianDay = Time.getJulianDay(currentTime, time.gmtoff);
// If the date we're building the String for is today's date, the format
// is "Today, June 24"
if (julianDay == currentJulianDay) {
String today = context.getString(R.string.today);
int formatId = R.string.format_full_friendly_date;
return String.format(context.getString(
formatId,
today,
getFormattedMonthDay(context, dateInMillis)));
} else if (julianDay < currentJulianDay + 7) {
// If the input date is less than a week in the future, just return the day name.
return getDayName(context, dateInMillis);
} else {
// Otherwise, use the form "Mon Jun 3"
SimpleDateFormat shortenedDateFormat = new SimpleDateFormat("EEE MMM dd");
return shortenedDateFormat.format(dateInMillis);
}
}
/**
* Given a day, returns just the name to use for that day.
* E.g "today", "tomorrow", "wednesday".
*
* @param context Context to use for resource localization
* @param dateInMillis The date in milliseconds
* @return
*/
public static String getDayName(Context context, long dateInMillis) {
// If the date is today, return the localized version of "Today" instead of the actual
// day name.
Time t = new Time();
t.setToNow();
int julianDay = Time.getJulianDay(dateInMillis, t.gmtoff);
int currentJulianDay = Time.getJulianDay(System.currentTimeMillis(), t.gmtoff);
if (julianDay == currentJulianDay) {
return context.getString(R.string.today);
} else if (julianDay == currentJulianDay + 1) {
return context.getString(R.string.tomorrow);
} else {
Time time = new Time();
time.setToNow();
// Otherwise, the format is just the day of the week (e.g "Wednesday".
SimpleDateFormat dayFormat = new SimpleDateFormat("EEEE");
return dayFormat.format(dateInMillis);
}
}
/**
* Converts db date format to the format "Month day", e.g "June 24".
*
* @param context Context to use for resource localization
* @param dateInMillis The db formatted date string, expected to be of the form specified
* in Utility.DATE_FORMAT
* @return The day in the form of a string formatted "December 6"
*/
public static String getFormattedMonthDay(Context context, long dateInMillis) {
Time time = new Time();
time.setToNow();
SimpleDateFormat dbDateFormat = new SimpleDateFormat(Utility.DATE_FORMAT);
SimpleDateFormat monthDayFormat = new SimpleDateFormat("MMMM dd");
String monthDayString = monthDayFormat.format(dateInMillis);
return monthDayString;
}
public static String getFormattedWind(Context context, float windSpeed, float degrees) {
int windFormat;
if (Utility.isMetric(context)) {
windFormat = R.string.format_wind_kmh;
} else {
windFormat = R.string.format_wind_mph;
windSpeed = .621371192237334f * windSpeed;
}
// From wind direction in degrees, determine compass direction as a string (e.g NW)
// You know what's fun, writing really long if/else statements with tons of possible
// conditions. Seriously, try it!
String direction = "Unknown";
if (degrees >= 337.5 || degrees < 22.5) {
direction = "N";
} else if (degrees >= 22.5 && degrees < 67.5) {
direction = "NE";
} else if (degrees >= 67.5 && degrees < 112.5) {
direction = "E";
} else if (degrees >= 112.5 && degrees < 157.5) {
direction = "SE";
} else if (degrees >= 157.5 && degrees < 202.5) {
direction = "S";
} else if (degrees >= 202.5 && degrees < 247.5) {
direction = "SW";
} else if (degrees >= 247.5 && degrees < 292.5) {
direction = "W";
} else if (degrees >= 292.5 && degrees < 337.5) {
direction = "NW";
}
return String.format(context.getString(windFormat), windSpeed, direction);
}
/**
* Helper method to provide the icon resource id according to the weather condition id returned
* by the OpenWeatherMap call.
*
* @param weatherId from OpenWeatherMap API response
* @return resource id for the corresponding icon. -1 if no relation is found.
*/
public static int getIconResourceForWeatherCondition(int weatherId) {
// Based on weather code data found at:
// http://bugs.openweathermap.org/projects/api/wiki/Weather_Condition_Codes
if (weatherId >= 200 && weatherId <= 232) {
return R.drawable.ic_storm;
} else if (weatherId >= 300 && weatherId <= 321) {
return R.drawable.ic_light_rain;
} else if (weatherId >= 500 && weatherId <= 504) {
return R.drawable.ic_rain;
} else if (weatherId == 511) {
return R.drawable.ic_snow;
} else if (weatherId >= 520 && weatherId <= 531) {
return R.drawable.ic_rain;
} else if (weatherId >= 600 && weatherId <= 622) {
return R.drawable.ic_snow;
} else if (weatherId >= 701 && weatherId <= 761) {
return R.drawable.ic_fog;
} else if (weatherId == 761 || weatherId == 781) {
return R.drawable.ic_storm;
} else if (weatherId == 800) {
return R.drawable.ic_clear;
} else if (weatherId == 801) {
return R.drawable.ic_light_clouds;
} else if (weatherId >= 802 && weatherId <= 804) {
return R.drawable.ic_cloudy;
}
return -1;
}
/**
* Helper method to provide the art resource id according to the weather condition id returned
* by the OpenWeatherMap call.
*
* @param weatherId from OpenWeatherMap API response
* @return resource id for the corresponding icon. -1 if no relation is found.
*/
public static int getArtResourceForWeatherCondition(int weatherId) {
// Based on weather code data found at:
// http://bugs.openweathermap.org/projects/api/wiki/Weather_Condition_Codes
if (weatherId >= 200 && weatherId <= 232) {
return R.drawable.art_storm;
} else if (weatherId >= 300 && weatherId <= 321) {
return R.drawable.art_light_rain;
} else if (weatherId >= 500 && weatherId <= 504) {
return R.drawable.art_rain;
} else if (weatherId == 511) {
return R.drawable.art_snow;
} else if (weatherId >= 520 && weatherId <= 531) {
return R.drawable.art_rain;
} else if (weatherId >= 600 && weatherId <= 622) {
return R.drawable.art_snow;
} else if (weatherId >= 701 && weatherId <= 761) {
return R.drawable.art_fog;
} else if (weatherId == 761 || weatherId == 781) {
return R.drawable.art_storm;
} else if (weatherId == 800) {
return R.drawable.art_clear;
} else if (weatherId == 801) {
return R.drawable.art_light_clouds;
} else if (weatherId >= 802 && weatherId <= 804) {
return R.drawable.art_clouds;
}
return -1;
}
/**
* Helper method to provide the art resource id according to the weather condition id returned
* by the OpenWeatherMap call.
*
* @param weatherId from OpenWeatherMap API response
* @return resource id for the corresponding icon. -1 if no relation is found.
*/
public static int getColorRessourceForWeatherCondition(int weatherId) {
// Based on weather code data found at:
// http://bugs.openweathermap.org/projects/api/wiki/Weather_Condition_Codes
return -1;
}
@Override
public void onLocationChanged(Location loc) {
String longitude = "Longitude: " + loc.getLongitude();
Log.v(TAG, longitude);
String latitude = "Latitude: " + loc.getLatitude();
Log.v(TAG, latitude);
String cityName = null;
Geocoder gcd = new Geocoder(getBaseContext(), Locale.getDefault());
List<Address> addresses;
try {
addresses = gcd.getFromLocation(loc.getLatitude(),
loc.getLongitude(), 1);
if (addresses.size() > 0) {
System.out.println(addresses.get(0).getLocality());
cityName = addresses.get(0).getLocality();
}
}
catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}