I would like to store a Location object and i'm trying to pick a good way to do it. Please give me advice that how to do this
I'm using this code but when i get the location from Preferences then Location return like this...
Location[mProvider=STORAGE,mTime=0,mLatitude=30.0,mLongitude=76.0,mHasAltitude=false,mAltitude=0.0,mHasSpeed=false,mSpeed=0.0,mHasBearing=false,mBearing=0.0,mHasAccuracy=false,mAccuracy=0.0,mExtras=null]
/** Store Location object in SharedPreferences */
public void storeLocation(Context context, Location location) {
SharedPreferences settings;
Editor editor;
try {
JSONObject locationJson = new JSONObject();
locationJson.put(LATITUDE, location.getLatitude());
locationJson.put(LONGITUDE, location.getLongitude());
settings = context.getSharedPreferences(PREFS_NAME,Context.MODE_PRIVATE);
editor = settings.edit();
editor.putString(KEY_LOCATION, locationJson.toString());
editor.commit();
Log.i("location_util_store", "Location" + location);
} catch (Exception e) {
e.printStackTrace();
}
}
/** Retrieve Location object from SharedPreferences
* @return */
public Location getPrevLocation(Context context) {
SharedPreferences settings;
try {
settings = context.getSharedPreferences(PREFS_NAME,Context.MODE_PRIVATE);
String jsonLocation = settings.getString(KEY_LOCATION, null);
if (jsonLocation != null) {
JSONObject locationJson = new JSONObject(jsonLocation);
Location location = new Location("STORAGE");
location.setLatitude(locationJson.getInt(LATITUDE));
location.setLongitude(locationJson.getInt(LONGITUDE));
Log.i("location_util_get", "Location" + location);
return location;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
Best Solution: Extract location lat & long parameters as string and save them in prefs. You can extract other information as well from location depending upon your usecase.
Saving a location:-
if (location == null) {
sharedPreferences.edit().removeKey("LOCATION_LAT").apply();
sharedPreferences.edit().removeKey("LOCATION_LON").apply();
sharedPreferences.edit().removeKey("LOCATION_PROVIDER").apply();
} else {
sharedPreferences.edit().putString("LOCATION_LAT", String.valueOf(location.getLatitude())).apply();
sharedPreferences.edit().putString("LOCATION_LON", String.valueOf(location.getLongitude())).apply();
sharedPreferences.edit().putString("LOCATION_PROVIDER", location.getProvider()).apply();
}
Retreiving a location:-
String lat = sharedPreferences.getString("LOCATION_LAT", null);
String lon = sharedPreferences.getString("LOCATION_LON", null);
Location location = null;
if (lat != null && lon != null) {
String provider = sharedPreferences.getString("LOCATION_PROVIDER", null);
location = new Location(provider);
location.setLatitude(Double.parseDouble(lat));
location.setLongitude(Double.parseDouble(lon));
}
return location;
Bad Solution: Use Gson to persist your Location instead:
Saving a Location:
String json = location == null ? null : new Gson().toJson(location);
sharedPreferences.edit().putString("Location", json).apply();
Retrieving a Location:
String json = sharedPreferences.getString("location", null);
return json == null ? null : new Gson().fromJson(json, Location.class);
As mentioned in this answer.
This shouldn't crash but it crashes on some devices. As mentioned here.
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