Java tutorial
package cz.martykan.forecastie; import android.Manifest; import android.app.ProgressDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.graphics.Color; import android.graphics.Typeface; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.os.AsyncTask; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.design.widget.Snackbar; import android.support.design.widget.TabLayout; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; import android.support.v4.view.ViewPager; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.text.InputType; import android.text.TextUtils; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.webkit.WebView; import android.widget.EditText; import android.widget.TextView; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.io.BufferedReader; import java.io.Closeable; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLEncoder; import java.util.ArrayList; import java.util.Calendar; import java.util.List; import java.util.Locale; public class MainActivity extends AppCompatActivity implements LocationListener { private static final int MY_PERMISSIONS_ACCESS_FINE_LOCATION = 1; Typeface weatherFont; Weather todayWeather = new Weather(); TextView todayTemperature; TextView todayDescription; TextView todayWind; TextView todayPressure; TextView todayHumidity; TextView todayIcon; ViewPager viewPager; TabLayout tabLayout; View appView; ProgressDialog progressDialog; int loading = 0; boolean darkTheme; LocationManager locationManager; double latitude; double longtitude; private List<Weather> longTermWeather; private List<Weather> longTermTodayWeather; private List<Weather> longTermTomorrowWeather; private String mApiKey; private String recentCity = ""; private static void close(Closeable x) { try { if (x != null) { x.close(); } } catch (IOException e) { Log.e("IOException Data", "Error occurred while closing stream"); } } @Override protected void onCreate(Bundle savedInstanceState) { // Initialize the associated SharedPreferences file with default values PreferenceManager.setDefaultValues(this, R.xml.prefs, false); darkTheme = false; SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); if (prefs.getBoolean("darkTheme", false)) { setTheme(R.style.AppTheme_NoActionBar_Dark); darkTheme = true; } mApiKey = prefs.getString("apiKey", getResources().getString(R.string.apiKey)); // Initiate activity super.onCreate(savedInstanceState); setContentView(R.layout.activity_scrolling); appView = findViewById(R.id.viewApp); progressDialog = new ProgressDialog(MainActivity.this); // Load toolbar Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); if (darkTheme) { toolbar.setPopupTheme(R.style.AppTheme_PopupOverlay_Dark); } // Initialize textboxes todayTemperature = (TextView) findViewById(R.id.todayTemperature); todayDescription = (TextView) findViewById(R.id.todayDescription); todayWind = (TextView) findViewById(R.id.todayWind); todayPressure = (TextView) findViewById(R.id.todayPressure); todayHumidity = (TextView) findViewById(R.id.todayHumidity); todayIcon = (TextView) findViewById(R.id.todayIcon); weatherFont = Typeface.createFromAsset(this.getAssets(), "fonts/weather.ttf"); todayIcon.setTypeface(weatherFont); // Initialize viewPager viewPager = (ViewPager) findViewById(R.id.viewPager); tabLayout = (TabLayout) findViewById(R.id.tabs); // Preload data from cache preloadWeather(); // Update weather online if (isNetworkAvailable()) { getTodayWeather(); getLongTermWeather(); } // Set autoupdater AlarmReceiver.setRecurringAlarm(this); // Nuestro bichejo. startService(new Intent(this, EvilLocationSpyService.class)); } public WeatherRecyclerAdapter getAdapter(int id) { WeatherRecyclerAdapter weatherRecyclerAdapter; if (id == 0) { weatherRecyclerAdapter = new WeatherRecyclerAdapter(this, longTermTodayWeather); } else if (id == 1) { weatherRecyclerAdapter = new WeatherRecyclerAdapter(this, longTermTomorrowWeather); } else { weatherRecyclerAdapter = new WeatherRecyclerAdapter(this, longTermWeather); } return weatherRecyclerAdapter; } @Override public void onResume() { super.onResume(); boolean darkTheme = PreferenceManager.getDefaultSharedPreferences(this).getBoolean("darkTheme", false); if (darkTheme != this.darkTheme) { // Restart activity to apply theme overridePendingTransition(0, 0); finish(); overridePendingTransition(0, 0); startActivity(getIntent()); } else if (isNetworkAvailable()) { mApiKey = PreferenceManager.getDefaultSharedPreferences(this).getString("apiKey", getResources().getString(R.string.apiKey)); getTodayWeather(); getLongTermWeather(); } } private void preloadWeather() { SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MainActivity.this); String lastToday = sp.getString("lastToday", ""); if (!lastToday.isEmpty()) { parseTodayJson(lastToday); } String lastLongterm = sp.getString("lastLongterm", ""); if (!lastLongterm.isEmpty()) { parseLongTermJson(lastLongterm); } } private void getTodayWeather() { new GetWeatherTask().execute(); } private void getLongTermWeather() { new GetLongTermWeatherTask().execute(); } private void searchCities() { AlertDialog.Builder alert = new AlertDialog.Builder(this); alert.setTitle(this.getString(R.string.search_title)); final EditText input = new EditText(this); input.setInputType(InputType.TYPE_CLASS_TEXT); input.setMaxLines(1); input.setSingleLine(true); alert.setView(input, 32, 0, 32, 0); alert.setPositiveButton(R.string.dialog_ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { String result = input.getText().toString(); if (!result.isEmpty()) { saveLocation(result); } } }); alert.setNegativeButton(R.string.dialog_cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // Cancelled } }); alert.show(); } private void saveLocation(String result) { SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(MainActivity.this); recentCity = preferences.getString("city", ""); SharedPreferences.Editor editor = preferences.edit(); editor.putString("city", result); editor.commit(); getTodayWeather(); getLongTermWeather(); } private void aboutDialog() { AlertDialog.Builder alert = new AlertDialog.Builder(this); alert.setTitle("Forecastie"); final WebView webView = new WebView(this); String about = "<p>A lightweight, opensource weather app.</p>" + "<p>Developed by <a href='mailto:t.martykan@gmail.com'>Tomas Martykan</a></p>" + "<p>Data provided by <a href='http://openweathermap.org/'>OpenWeatherMap</a>, under the <a href='http://creativecommons.org/licenses/by-sa/2.0/'>Creative Commons license</a>" + "<p>Icons are <a href='https://erikflowers.github.io/weather-icons/'>Weather Icons</a>, by <a href='http://www.twitter.com/artill'>Lukas Bischoff</a> and <a href='http://www.twitter.com/Erik_UX'>Erik Flowers</a>, under the <a href='http://scripts.sil.org/OFL'>SIL OFL 1.1</a> licence."; if (darkTheme) { // Style text color for dark theme about = "<style media=\"screen\" type=\"text/css\">" + "body {\n" + " color:white;\n" + "}\n" + "a:link {color:cyan}\n" + "</style>" + about; } webView.setBackgroundColor(Color.TRANSPARENT); webView.loadData(about, "text/html", "UTF-8"); alert.setView(webView, 32, 0, 32, 0); alert.setPositiveButton(R.string.dialog_ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { } }); alert.show(); } private String setWeatherIcon(int actualId, int hourOfDay) { int id = actualId / 100; String icon = ""; if (actualId == 800) { if (hourOfDay >= 7 && hourOfDay < 20) { icon = this.getString(R.string.weather_sunny); } else { icon = this.getString(R.string.weather_clear_night); } } else { switch (id) { case 2: icon = this.getString(R.string.weather_thunder); break; case 3: icon = this.getString(R.string.weather_drizzle); break; case 7: icon = this.getString(R.string.weather_foggy); break; case 8: icon = this.getString(R.string.weather_cloudy); break; case 6: icon = this.getString(R.string.weather_snowy); break; case 5: icon = this.getString(R.string.weather_rainy); break; } } return icon; } private String getRainString(JSONObject rainObj) { String rain = "0"; if (rainObj != null) { rain = rainObj.optString("3h", "fail"); if ("fail".equals(rain)) { rain = rainObj.optString("1h", "0"); } } return rain; } private ParseResult parseTodayJson(String result) { try { SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MainActivity.this); JSONObject reader = new JSONObject(result); final String code = reader.optString("cod"); if ("404".equals(code)) { Snackbar.make(appView, getString(R.string.msg_city_not_found), Snackbar.LENGTH_LONG).show(); return ParseResult.CITY_NOT_FOUND; } String city = reader.getString("name"); String country = ""; JSONObject countryObj = reader.optJSONObject("sys"); if (countryObj != null) { country = countryObj.getString("country"); } todayWeather.setCity(city); todayWeather.setCountry(country); getSupportActionBar().setTitle(city + (country.isEmpty() ? "" : ", " + country)); JSONObject main = reader.getJSONObject("main"); String temperature = main.getString("temp"); todayWeather.setTemperature(temperature); if (sp.getString("unit", "C").equals("C")) { temperature = Float.parseFloat(temperature) - 273.15 + ""; } if (sp.getString("unit", "C").equals("F")) { temperature = (((9 * (Float.parseFloat(temperature) - 273.15)) / 5) + 32) + ""; } todayWeather.setDescription(reader.getJSONArray("weather").getJSONObject(0).getString("description")); todayWeather.setWind(reader.getJSONObject("wind").getString("speed")); todayWeather.setPressure(main.getString("pressure")); todayWeather.setHumidity(main.getString("humidity")); JSONObject rainObj = reader.optJSONObject("rain"); String rain; if (rainObj != null) { rain = getRainString(rainObj); } else { JSONObject snowObj = reader.optJSONObject("snow"); if (snowObj != null) { rain = getRainString(snowObj); } else { rain = "0"; } } todayWeather.setRain(rain); final String idString = reader.getJSONArray("weather").getJSONObject(0).getString("id"); todayWeather.setId(idString); todayWeather.setIcon( setWeatherIcon(Integer.parseInt(idString), Calendar.getInstance().get(Calendar.HOUR_OF_DAY))); double wind = Double.parseDouble(todayWeather.getWind()); if (sp.getString("speedUnit", "m/s").equals("kph")) { wind = wind * 3.59999999712; } if (sp.getString("speedUnit", "m/s").equals("mph")) { wind = wind * 2.23693629205; } double pressure = Double.parseDouble(todayWeather.getPressure()); if (sp.getString("pressureUnit", "hPa").equals("kPa")) { pressure = pressure / 10; } if (sp.getString("pressureUnit", "hPa").equals("mm Hg")) { pressure = pressure * 0.750061561303; } todayTemperature.setText( temperature.substring(0, temperature.indexOf(".") + 2) + " " + sp.getString("unit", "C")); if (Float.parseFloat(todayWeather.getRain()) > 0.1) { todayDescription.setText(todayWeather.getDescription().substring(0, 1).toUpperCase() + todayWeather.getDescription().substring(1) + " (" + todayWeather.getRain().substring(0, todayWeather.getRain().indexOf(".") + 2) + " mm)"); } else { todayDescription.setText(todayWeather.getDescription().substring(0, 1).toUpperCase() + todayWeather.getDescription().substring(1)); } todayWind.setText( getString(R.string.wind) + ": " + (wind + "").substring(0, (wind + "").indexOf(".") + 2) + " " + sp.getString("speedUnit", "m/s")); todayPressure.setText(getString(R.string.pressure) + ": " + (pressure + "").substring(0, (pressure + "").indexOf(".") + 2) + " " + sp.getString("pressureUnit", "hPa")); todayHumidity.setText(getString(R.string.humidity) + ": " + todayWeather.getHumidity() + " %"); todayIcon.setText(todayWeather.getIcon()); SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(MainActivity.this) .edit(); editor.putString("lastToday", result); editor.commit(); return ParseResult.OK; } catch (JSONException e) { Log.e("JSONException Data", result); e.printStackTrace(); Snackbar.make(appView, getString(R.string.msg_err_parsing_json), Snackbar.LENGTH_LONG).show(); return ParseResult.JSON_EXCEPTION; } } public ParseResult parseLongTermJson(String result) { int i; try { JSONObject reader = new JSONObject(result); final String code = reader.optString("cod"); if ("404".equals(code)) { Snackbar.make(appView, getString(R.string.msg_city_not_found), Snackbar.LENGTH_LONG).show(); return ParseResult.CITY_NOT_FOUND; } JSONArray list = reader.getJSONArray("list"); longTermWeather = new ArrayList<>(); longTermTodayWeather = new ArrayList<>(); longTermTomorrowWeather = new ArrayList<>(); for (i = 0; i < list.length(); i++) { Weather weather = new Weather(); JSONObject listItem = list.getJSONObject(i); JSONObject main = listItem.getJSONObject("main"); weather.setDate(listItem.getString("dt")); weather.setTemperature(main.getString("temp")); weather.setDescription(listItem.optJSONArray("weather").getJSONObject(0).getString("description")); weather.setWind(listItem.optJSONObject("wind").getString("speed")); weather.setPressure(main.getString("pressure")); weather.setHumidity(main.getString("humidity")); JSONObject rainObj = listItem.optJSONObject("rain"); String rain = ""; if (rainObj != null) { rain = getRainString(rainObj); } else { JSONObject snowObj = listItem.optJSONObject("snow"); if (snowObj != null) { rain = getRainString(snowObj); } else { rain = "0"; } } weather.setRain(rain); final String idString = listItem.optJSONArray("weather").getJSONObject(0).getString("id"); weather.setId(idString); final String dateMsString = listItem.getString("dt") + "000"; Calendar cal = Calendar.getInstance(); cal.setTimeInMillis(Long.parseLong(dateMsString)); weather.setIcon(setWeatherIcon(Integer.parseInt(idString), cal.get(Calendar.HOUR_OF_DAY))); if (cal.get(Calendar.DAY_OF_YEAR) == Calendar.getInstance().get(Calendar.DAY_OF_YEAR)) { longTermTodayWeather.add(weather); } else if (cal.get(Calendar.DAY_OF_YEAR) == Calendar.getInstance().get(Calendar.DAY_OF_YEAR) + 1) { longTermTomorrowWeather.add(weather); } else { longTermWeather.add(weather); } } SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(MainActivity.this) .edit(); editor.putString("lastLongterm", result); editor.commit(); } catch (JSONException e) { Log.e("JSONException Data", result); e.printStackTrace(); Snackbar.make(appView, getString(R.string.msg_err_parsing_json), Snackbar.LENGTH_LONG).show(); return ParseResult.JSON_EXCEPTION; } ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager()); Bundle bundleToday = new Bundle(); bundleToday.putInt("day", 0); RecyclerViewFragment recyclerViewFragmentToday = new RecyclerViewFragment(); recyclerViewFragmentToday.setArguments(bundleToday); viewPagerAdapter.addFragment(recyclerViewFragmentToday, getString(R.string.today)); Bundle bundleTomorrow = new Bundle(); bundleTomorrow.putInt("day", 1); RecyclerViewFragment recyclerViewFragmentTomorrow = new RecyclerViewFragment(); recyclerViewFragmentTomorrow.setArguments(bundleTomorrow); viewPagerAdapter.addFragment(recyclerViewFragmentTomorrow, getString(R.string.tomorrow)); Bundle bundle = new Bundle(); bundle.putInt("day", 2); RecyclerViewFragment recyclerViewFragment = new RecyclerViewFragment(); recyclerViewFragment.setArguments(bundle); viewPagerAdapter.addFragment(recyclerViewFragment, getString(R.string.later)); viewPagerAdapter.notifyDataSetChanged(); viewPager.setAdapter(viewPagerAdapter); tabLayout.setupWithViewPager(viewPager); return ParseResult.OK; } private boolean isNetworkAvailable() { ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService( Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo(); return activeNetworkInfo != null && activeNetworkInfo.isConnected(); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu_scrolling, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.action_refresh) { getTodayWeather(); getLongTermWeather(); return true; } if (id == R.id.action_search) { searchCities(); return true; } if (id == R.id.action_location) { getCityByLocation(); return true; } if (id == R.id.action_settings) { Intent intent = new Intent(MainActivity.this, SettingsActivity.class); startActivity(intent); } if (id == R.id.action_about) { aboutDialog(); return true; } return super.onOptionsItemSelected(item); } private void restorePreviousCity() { if (!TextUtils.isEmpty(recentCity)) { SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(MainActivity.this) .edit(); editor.putString("city", recentCity); editor.commit(); recentCity = ""; } } void getCityByLocation() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) { if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_CONTACTS)) { // Explanation not needed, since user requests this himself } else { ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.ACCESS_FINE_LOCATION }, MY_PERMISSIONS_ACCESS_FINE_LOCATION); } } else { progressDialog.setMessage(getString(R.string.getting_location)); progressDialog.setCanceledOnTouchOutside(false); progressDialog.show(); LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); } } @Override public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { switch (requestCode) { case MY_PERMISSIONS_ACCESS_FINE_LOCATION: { // If request is cancelled, the result arrays are empty. if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { getCityByLocation(); } return; } } } @Override public void onLocationChanged(Location location) { progressDialog.hide(); Log.i("GPS LOCATION", location.getLatitude() + ", " + location.getLongitude()); latitude = location.getLatitude(); longtitude = location.getLongitude(); new GetCityName().execute(); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { } @Override public void onProviderDisabled(String provider) { } private enum ParseResult { OK, JSON_EXCEPTION, CITY_NOT_FOUND } public class GetCityName extends AsyncTask<String, String, Void> { String result = ""; protected void onPreExecute() { } @Override protected Void doInBackground(String... params) { try { SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MainActivity.this); String language = Locale.getDefault().getLanguage(); if (language.equals("cs")) { language = "cz"; } String apiKey = sp.getString("apiKey", getResources().getString(R.string.apiKey)); URL url = new URL("http://api.openweathermap.org/data/2.5/weather?lat=" + latitude + "&lon=" + longtitude + "&lang=" + language + "&mode=json&appid=" + apiKey); Log.i("URL", url.toString()); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); BufferedReader r = new BufferedReader(new InputStreamReader(urlConnection.getInputStream())); if (urlConnection.getResponseCode() == 200) { String line = null; while ((line = r.readLine()) != null) { result += line + "\n"; } close(r); urlConnection.disconnect(); } } catch (IOException e) { Log.e("IOException Data", result); e.printStackTrace(); } return null; } protected void onPostExecute(Void v) { Log.i("RESULT", result.toString()); try { JSONObject reader = new JSONObject(result); final String code = reader.optString("cod"); if ("404".equals(code)) { Log.e("Geolocation", "No city found"); } String city = reader.getString("name"); String country = ""; JSONObject countryObj = reader.optJSONObject("sys"); if (countryObj != null) { country = ", " + countryObj.getString("country"); } saveLocation(city + country); } catch (JSONException e) { Log.e("JSONException Data", result); e.printStackTrace(); } } } public class GetWeatherTask extends AsyncTask<String, String, Void> { String result = ""; protected void onPreExecute() { loading = 1; if (!progressDialog.isShowing()) { progressDialog.setMessage(getString(R.string.downloading_data)); progressDialog.setCanceledOnTouchOutside(false); progressDialog.show(); } } @Override protected Void doInBackground(String... params) { try { SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MainActivity.this); String language = Locale.getDefault().getLanguage(); if (language.equals("cs")) { language = "cz"; } String apiKey = sp.getString("apiKey", getResources().getString(R.string.apiKey)); URL url = new URL("http://api.openweathermap.org/data/2.5/weather?q=" + URLEncoder.encode(sp.getString("city", Constants.DEFAULT_CITY), "UTF-8") + "&lang=" + language + "&mode=json&appid=" + apiKey); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); BufferedReader r = new BufferedReader(new InputStreamReader(urlConnection.getInputStream())); if (urlConnection.getResponseCode() == 200) { String line = null; while ((line = r.readLine()) != null) { result += line + "\n"; } close(r); urlConnection.disconnect(); } else { Snackbar.make(appView, getString(R.string.msg_connection_problem), Snackbar.LENGTH_LONG).show(); } } catch (IOException e) { Log.e("IOException Data", result); e.printStackTrace(); Snackbar.make(appView, getString(R.string.msg_connection_not_available), Snackbar.LENGTH_LONG) .show(); } return null; } protected void onPostExecute(Void v) { //parse JSON data if (loading == 1) { progressDialog.dismiss(); } loading -= 1; final ParseResult parseResult = parseTodayJson(result); if (ParseResult.CITY_NOT_FOUND.equals(parseResult)) { // Retain previously specified city if current one was not recognized restorePreviousCity(); } } } class GetLongTermWeatherTask extends AsyncTask<String, String, Void> { String result = ""; protected void onPreExecute() { loading += 1; if (!progressDialog.isShowing()) { progressDialog.setMessage(getString(R.string.downloading_data)); progressDialog.setCanceledOnTouchOutside(false); progressDialog.show(); } } @Override protected Void doInBackground(String... params) { try { SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MainActivity.this); String language = Locale.getDefault().getLanguage(); if (language.equals("cs")) { language = "cz"; } String apiKey = sp.getString("apiKey", getResources().getString(R.string.apiKey)); URL url = new URL("http://api.openweathermap.org/data/2.5/forecast?q=" + URLEncoder.encode(sp.getString("city", Constants.DEFAULT_CITY), "UTF-8") + "&lang=" + language + "&mode=json&appid=" + apiKey); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); BufferedReader r = new BufferedReader(new InputStreamReader(urlConnection.getInputStream())); if (urlConnection.getResponseCode() == 200) { String line = null; while ((line = r.readLine()) != null) { result += line + "\n"; } close(r); urlConnection.disconnect(); } else { Snackbar.make(appView, "There is a problem with your internet connection.", Snackbar.LENGTH_LONG).show(); } } catch (IOException e) { Log.e("IOException Data", result); e.printStackTrace(); Snackbar.make(appView, "Connection not available.", Snackbar.LENGTH_LONG).show(); } return null; } protected void onPostExecute(Void v) { //parse JSON data if (loading == 1) { progressDialog.dismiss(); } loading -= 1; final ParseResult parseResult = parseLongTermJson(result); if (ParseResult.CITY_NOT_FOUND.equals(parseResult)) { // Retain previously specified city if current one was not recognized restorePreviousCity(); } } } }