Java tutorial
package com.cs528.style.style.weather; 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.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 com.cs528.style.style.MainActivity; import com.cs528.style.style.R; import com.cs528.style.style.closet.GalleryActivity; import com.cs528.style.style.closet.Clothes; import com.cs528.style.style.database.ClothesDatabase; import com.cs528.style.style.database.ScheduleDatabase; import com.cs528.style.style.schedule.Schedule; 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.io.UnsupportedEncodingException; import java.math.BigDecimal; import java.math.RoundingMode; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.net.URLEncoder; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Locale; import java.util.Map; /** * Created by xiongkuang on 4/14/16. * This activity is used to display weather condition and */ public class WeatherActivity extends MainActivity implements LocationListener { private static final int MY_PERMISSIONS_ACCESS_FINE_LOCATION = 1; private final static double COLD = 5; private final static double MODERATE = 20; private static Map<String, Integer> speedUnits = new HashMap<>(3); private static Map<String, Integer> pressUnits = new HashMap<>(3); Typeface weatherFont; Typeface clothFont; Weather todayWeather = new Weather(); TextView todayTemperature; TextView todayDescription; TextView todayWind; TextView todayPressure; TextView todayHumidity; TextView todayIcon; TextView topIcon; TextView bottomIcon; TextView hatIcon; TextView shoeIcon; ViewPager viewPager; TabLayout tabLayout; View appView; ProgressDialog progressDialog; int loading = 0; boolean darkTheme; boolean destroyed = false; private List<Weather> longTermWeather; private List<Weather> longTermTodayWeather; private List<Weather> longTermTomorrowWeather; private String recentCity = ""; private int type; private int warmness; private int style; private String temp; private float score = Float.MAX_VALUE; private List<Integer> result = new ArrayList<>(); private static void close(Closeable x) { try { if (x != null) { x.close(); } } catch (IOException e) { Log.e("IOException Data", "Error occurred while closing stream"); } } public static String localize(SharedPreferences sp, Context context, String preferenceKey, String defaultValueKey) { String preferenceValue = sp.getString(preferenceKey, defaultValueKey); String result = preferenceValue; if ("speedUnit".equals(preferenceKey)) { if (speedUnits.containsKey(preferenceValue)) { result = context.getString(speedUnits.get(preferenceValue)); } } else if ("pressureUnit".equals(preferenceKey)) { if (pressUnits.containsKey(preferenceValue)) { result = context.getString(pressUnits.get(preferenceValue)); } } return result; } public static String getWindDirectionString(SharedPreferences sp, Context context, Weather weather) { String pref = sp.getString("windDirectionFormat", null); if ("arrow".equals(pref)) { return weather.getWindDirection(8).getArrow(context); } else if ("abbr".equals(pref)) { return weather.getWindDirection().getLocalizedString(context); } return ""; } @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; } // Initiate activity super.onCreate(savedInstanceState); //setContentView(R.layout.activity_scrolling); appView = findViewById(R.id.viewApp); getLayoutInflater().inflate(R.layout.activity_scrolling, frameLayout); progressDialog = new ProgressDialog(WeatherActivity.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); topIcon = (TextView) findViewById(R.id.topIcon); bottomIcon = (TextView) findViewById(R.id.bottomIcon); hatIcon = (TextView) findViewById(R.id.hatIcon); shoeIcon = (TextView) findViewById(R.id.shoeIcon); weatherFont = Typeface.createFromAsset(this.getAssets(), "fonts/weather.ttf"); clothFont = Typeface.createFromAsset(this.getAssets(), "fonts/cloth.ttf"); // todayIcon.setTypeface(weatherFont); topIcon.setTypeface(clothFont); bottomIcon.setTypeface(clothFont); shoeIcon.setTypeface(clothFont); hatIcon.setTypeface(clothFont); topIcon.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { scheduleAndWeatherFilter(); Intent intent = new Intent(WeatherActivity.this, GalleryActivity.class); intent.putExtra("clothes", result.toArray()); startActivity(intent); } }); // Initialize viewPagerg viewPager = (ViewPager) findViewById(R.id.viewPager); tabLayout = (TabLayout) findViewById(R.id.tabs); destroyed = false; initMappings(); // Preload data from cache preloadWeather(); // Set autoupdater AlarmReceiver.setRecurringAlarm(this); } 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()) { getTodayWeather(); getLongTermWeather(); } } @Override protected void onDestroy() { super.onDestroy(); destroyed = true; } private void preloadWeather() { SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this); String lastToday = sp.getString("lastToday", ""); if (!lastToday.isEmpty()) { new TodayWeatherTask().execute("cachedResponse", lastToday); } String lastLongterm = sp.getString("lastLongterm", ""); if (!lastLongterm.isEmpty()) { new LongTermWeatherTask().execute("cachedResponse", lastLongterm); } } private void getTodayWeather() { new TodayWeatherTask().execute(); } private void getLongTermWeather() { new LongTermWeatherTask().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(WeatherActivity.this); recentCity = preferences.getString("city", Constants.DEFAULT_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("Style"); final WebView webView = new WebView(this); String about = "<p>Developed by KuangXIONG, Tengyang Jia, ZhaojunYang</p>" + "<p>A cloth suggestion application</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>Weather 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." + "<p>Cloth Icons are <a href='http://pictofoundry.com/'>PictoFoundry Font Pack 2</a>, bought by TengyangJia</p>"; 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 { JSONObject reader = new JSONObject(result); final String code = reader.optString("cod"); if ("404".equals(code)) { 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); JSONObject main = reader.getJSONObject("main"); todayWeather.setTemperature(main.getString("temp")); todayWeather.setDescription(reader.getJSONArray("weather").getJSONObject(0).getString("description")); JSONObject windObj = reader.getJSONObject("wind"); todayWeather.setWind(windObj.getString("speed")); if (windObj.has("deg")) { todayWeather.setWindDirectionDegree(windObj.getDouble("deg")); } else { Log.e("parseTodayJson", "No wind direction available"); todayWeather.setWindDirectionDegree(null); } 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))); SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this) .edit(); editor.putString("lastToday", result); editor.commit(); } catch (JSONException e) { Log.e("JSONException Data", result); e.printStackTrace(); return ParseResult.JSON_EXCEPTION; } return ParseResult.OK; } private void updateTodayWeatherUI() { String city = todayWeather.getCity(); String country = todayWeather.getCountry(); getSupportActionBar().setTitle(city + (country.isEmpty() ? "" : ", " + country)); SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this); String temperature = todayWeather.getTemperature(); 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) + ""; } 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; } if (new BigDecimal(temperature).setScale(0, RoundingMode.DOWN).intValue() == 0) { temperature = "0"; } else { temperature = temperature.substring(0, temperature.indexOf(".") + 2); } todayTemperature.setText(temperature + " " + 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) + " " + localize(sp, "speedUnit", "m/s") + (todayWeather.isWindDirectionAvailable() ? " " + getWindDirectionString(sp, this, todayWeather) : "")); todayPressure.setText( getString(R.string.pressure) + ": " + (pressure + "").substring(0, (pressure + "").indexOf(".") + 2) + " " + localize(sp, "pressureUnit", "hPa")); todayHumidity.setText(getString(R.string.humidity) + ": " + todayWeather.getHumidity() + " %"); // todayIcon.setText(todayWeather.getIcon()); } public ParseResult parseLongTermJson(String result) { int i; try { JSONObject reader = new JSONObject(result); final String code = reader.optString("cod"); if ("404".equals(code)) { return ParseResult.CITY_NOT_FOUND; } longTermWeather = new ArrayList<>(); longTermTodayWeather = new ArrayList<>(); longTermTomorrowWeather = new ArrayList<>(); JSONArray list = reader.getJSONArray("list"); 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")); JSONObject windObj = listItem.optJSONObject("wind"); weather.setWind(windObj.getString("speed")); weather.setWindDirectionDegree(windObj.getDouble("deg")); 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))); Calendar today = Calendar.getInstance(); if (cal.get(Calendar.DAY_OF_YEAR) == today.get(Calendar.DAY_OF_YEAR)) { longTermTodayWeather.add(weather); } else if (cal.get(Calendar.DAY_OF_YEAR) == today.get(Calendar.DAY_OF_YEAR) + 1) { longTermTomorrowWeather.add(weather); } else { longTermWeather.add(weather); } } SharedPreferences.Editor editor = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this) .edit(); editor.putString("lastLongterm", result); editor.commit(); } catch (JSONException e) { Log.e("JSONException Data", result); e.printStackTrace(); return ParseResult.JSON_EXCEPTION; } return ParseResult.OK; } //suggester algorithm private void updateLongTermWeatherUI() { if (destroyed) { return; } 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)); int currentPage = viewPager.getCurrentItem(); viewPagerAdapter.notifyDataSetChanged(); viewPager.setAdapter(viewPagerAdapter); tabLayout.setupWithViewPager(viewPager); if (currentPage == 0 && longTermTodayWeather.isEmpty()) { currentPage = 1; } viewPager.setCurrentItem(currentPage, false); } private boolean isNetworkAvailable() { ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService( Context.CONNECTIVITY_SERVICE); NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo(); return activeNetworkInfo != null && activeNetworkInfo.isConnected(); } private void scheduleAndWeatherFilter() { //temperature temp = todayWeather.getTemperature(); double temperature = Float.parseFloat(temp) - 273.15; if (temperature < COLD) { warmness = 2; } else if (temperature < MODERATE) { warmness = 1; } else { warmness = 0; } //date ScheduleDatabase.init(getApplicationContext()); Date date = new Date(); long l = 24 * 60 * 60 * 1000; long miliSec = date.getTime() - (date.getTime() % l) + 4 * 60 * 60 * 1000; date.setTime(miliSec); Schedule schedule = ScheduleDatabase.getSchedule(date); // set if (schedule == null || schedule.getEvent().ordinal() == 3) { style = 0; } else { style = 1; } ClothesDatabase.init(getApplicationContext()); List<Clothes> clothesTopList = ClothesDatabase.getByWarmnessAndStyle(warmness, style, 0); List<Clothes> clothesBottomList = ClothesDatabase.getByWarmnessAndStyle(warmness, style, 1); List<Clothes> clothesHatList = ClothesDatabase.getByWarmnessAndStyle(warmness, style, 2); List<Clothes> clothesShoeList = ClothesDatabase.getByWarmnessAndStyle(warmness, style, 3); List<List<Clothes>> allClothes = new ArrayList<>(); allClothes.add(clothesHatList); allClothes.add(clothesTopList); allClothes.add(clothesBottomList); allClothes.add(clothesShoeList); colorFilter(allClothes, 0, 0, 0, new ArrayList<Integer>()); } // color filter to match color from hat to shoe. private void colorFilter(List<List<Clothes>> allClothes, int index, float lastH, float sum, List<Integer> combine) { if (index == allClothes.size()) { if (sum < score) { score = sum; result = new ArrayList<>(combine); } } else { List<Clothes> temp = allClothes.get(index); if (allClothes.get(index).size() == 0) { colorFilter(allClothes, index + 1, 0, sum, combine); } else { for (int i = 0; i < temp.size(); i++) { float hue = transferFromRgbToH(temp.get(i).getClothesColor()); combine.add(temp.get(i).getId()); float dec; if (lastH == 0) { dec = 0; } else { dec = Math.abs(sum + hue - lastH); dec = dec > 180 ? 360 - dec : dec; } colorFilter(allClothes, index + 1, hue, dec, combine); combine.remove(combine.size() - 1); } } } } public float transferFromRgbToH(int color) { int red = Color.red(color); int green = Color.green(color); int blue = Color.blue(color); float[] hsv = new float[3]; Color.RGBToHSV(red, green, blue, hsv); return hsv[0]; } @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) { if (isNetworkAvailable()) { getTodayWeather(); getLongTermWeather(); } else { Snackbar.make(appView, getString(R.string.msg_connection_not_available), Snackbar.LENGTH_LONG) .show(); } 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(WeatherActivity.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(WeatherActivity.this) .edit(); editor.putString("city", recentCity); editor.commit(); recentCity = ""; } } private void initMappings() { speedUnits.put("m/s", R.string.speed_unit_mps); speedUnits.put("kph", R.string.speed_unit_kph); speedUnits.put("mph", R.string.speed_unit_mph); pressUnits.put("hPa", R.string.pressure_unit_hpa); pressUnits.put("kPa", R.string.pressure_unit_kpa); pressUnits.put("mm Hg", R.string.pressure_unit_mmhg); } private String localize(SharedPreferences sp, String preferenceKey, String defaultValueKey) { return localize(sp, this, preferenceKey, defaultValueKey); } 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.NETWORK_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()); double latitude = location.getLatitude(); double longitude = location.getLongitude(); new ProvideCityNameTask().execute("coords", Double.toString(latitude), Double.toString(longitude)); } @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 } private enum TaskResult { SUCCESS, BAD_RESPONSE, IO_EXCEPTION, TOO_MANY_REQUESTS } abstract class GenericRequestTask extends AsyncTask<String, String, TaskOutput> { private void incLoadingCounter() { loading++; } private void decLoadingCounter() { loading--; } @Override protected void onPreExecute() { incLoadingCounter(); if (!progressDialog.isShowing()) { progressDialog.setMessage(getString(R.string.downloading_data)); progressDialog.setCanceledOnTouchOutside(false); progressDialog.show(); } } @Override protected TaskOutput doInBackground(String... params) { TaskOutput output = new TaskOutput(); String response = ""; String[] coords = new String[] {}; if (params != null && params.length > 0) { final String zeroParam = params[0]; if ("cachedResponse".equals(zeroParam)) { response = params[1]; // Actually we did nothing in this case :) output.taskResult = TaskResult.SUCCESS; } else if ("coords".equals(zeroParam)) { String lat = params[1]; String lon = params[2]; coords = new String[] { lat, lon }; } } if (response.isEmpty()) { try { URL url = provideURL(coords); HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); if (urlConnection.getResponseCode() == 200) { InputStreamReader inputStreamReader = new InputStreamReader(urlConnection.getInputStream()); BufferedReader r = new BufferedReader(inputStreamReader); int responseCode = urlConnection.getResponseCode(); String line = null; while ((line = r.readLine()) != null) { response += line + "\n"; } close(r); urlConnection.disconnect(); // Background work finished successfully Log.i("Task", "done successfully"); output.taskResult = TaskResult.SUCCESS; } else if (urlConnection.getResponseCode() == 429) { // Too many requests Log.i("Task", "too many requests"); output.taskResult = TaskResult.TOO_MANY_REQUESTS; } else { // Bad response from server Log.i("Task", "bad response"); output.taskResult = TaskResult.BAD_RESPONSE; } } catch (IOException e) { Log.e("IOException Data", response); e.printStackTrace(); // Exception while reading data from url connection output.taskResult = TaskResult.IO_EXCEPTION; } } if (TaskResult.SUCCESS.equals(output.taskResult)) { // Parse JSON data ParseResult parseResult = parseResponse(response); if (ParseResult.CITY_NOT_FOUND.equals(parseResult)) { // Retain previously specified city if current one was not recognized restorePreviousCity(); } output.parseResult = parseResult; } return output; } @Override protected void onPostExecute(TaskOutput output) { if (loading == 1) { progressDialog.dismiss(); } decLoadingCounter(); updateMainUI(); handleTaskOutput(output); } protected final void handleTaskOutput(TaskOutput output) { switch (output.taskResult) { case SUCCESS: { ParseResult parseResult = output.parseResult; if (ParseResult.CITY_NOT_FOUND.equals(parseResult)) { Snackbar.make(appView, getString(R.string.msg_city_not_found), Snackbar.LENGTH_LONG).show(); } else if (ParseResult.JSON_EXCEPTION.equals(parseResult)) { Snackbar.make(appView, getString(R.string.msg_err_parsing_json), Snackbar.LENGTH_LONG).show(); } break; } case TOO_MANY_REQUESTS: { Snackbar.make(appView, getString(R.string.msg_too_many_requests), Snackbar.LENGTH_LONG).show(); break; } case BAD_RESPONSE: { Snackbar.make(appView, getString(R.string.msg_connection_problem), Snackbar.LENGTH_LONG).show(); break; } case IO_EXCEPTION: { Snackbar.make(appView, getString(R.string.msg_connection_not_available), Snackbar.LENGTH_LONG) .show(); break; } } } private String getLanguage() { String language = Locale.getDefault().getLanguage(); if (language.equals("cs")) { language = "cz"; } return language; } private URL provideURL(String[] coords) throws UnsupportedEncodingException, MalformedURLException { SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(WeatherActivity.this); final String apiKey = sp.getString("apiKey", getResources().getString(R.string.apiKey)); StringBuilder urlBuilder = new StringBuilder("http://api.openweathermap.org/data/2.5/"); urlBuilder.append(getAPIName()).append("?"); if (coords.length == 2) { urlBuilder.append("lat=").append(coords[0]).append("&lon=").append(coords[1]); } else { final String city = sp.getString("city", Constants.DEFAULT_CITY); urlBuilder.append("q=").append(URLEncoder.encode(city, "UTF-8")); } urlBuilder.append("&lang=").append(getLanguage()); urlBuilder.append("&mode=json"); urlBuilder.append("&appid=").append(apiKey); return new URL(urlBuilder.toString()); } protected void updateMainUI() { } protected abstract ParseResult parseResponse(String response); protected abstract String getAPIName(); } class TodayWeatherTask extends GenericRequestTask { @Override protected void onPreExecute() { loading = 0; super.onPreExecute(); } @Override protected ParseResult parseResponse(String response) { return parseTodayJson(response); } @Override protected String getAPIName() { return "weather"; } @Override protected void updateMainUI() { updateTodayWeatherUI(); } } class LongTermWeatherTask extends GenericRequestTask { @Override protected ParseResult parseResponse(String response) { return parseLongTermJson(response); } @Override protected String getAPIName() { return "forecast"; } @Override protected void updateMainUI() { updateLongTermWeatherUI(); } } class ProvideCityNameTask extends GenericRequestTask { @Override protected void onPreExecute() { /*Nothing*/ } @Override protected String getAPIName() { return "weather"; } @Override protected ParseResult parseResponse(String response) { Log.i("RESULT", response.toString()); try { JSONObject reader = new JSONObject(response); final String code = reader.optString("cod"); if ("404".equals(code)) { Log.e("Geolocation", "No city found"); return ParseResult.CITY_NOT_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", response); e.printStackTrace(); return ParseResult.JSON_EXCEPTION; } return ParseResult.OK; } @Override protected void onPostExecute(TaskOutput output) { /* Handle possible errors only */ handleTaskOutput(output); } } private class TaskOutput { /** * Indicates result of parsing server response */ ParseResult parseResult; /** * Indicates result of background task */ TaskResult taskResult; } }