Java tutorial
/* * FlightIntel for Pilots * * Copyright 2012 Nadeem Hasan <nhasan@nadmm.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.nadmm.airports.wx; import java.text.NumberFormat; import java.util.ArrayList; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteQueryBuilder; import android.graphics.drawable.Drawable; import android.location.Location; import android.os.Bundle; import android.support.v4.content.LocalBroadcastManager; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.LinearLayout; import android.widget.TextView; import com.nadmm.airports.DatabaseManager; import com.nadmm.airports.DatabaseManager.Airports; import com.nadmm.airports.DatabaseManager.Awos1; import com.nadmm.airports.DatabaseManager.Awos2; import com.nadmm.airports.DatabaseManager.Wxs; import com.nadmm.airports.DrawerActivityBase; import com.nadmm.airports.FragmentBase; import com.nadmm.airports.R; import com.nadmm.airports.utils.CursorAsyncTask; import com.nadmm.airports.utils.FormatUtils; import com.nadmm.airports.utils.GeoUtils; import com.nadmm.airports.utils.TimeUtils; import com.nadmm.airports.utils.UiUtils; import com.nadmm.airports.wx.Metar.Flags; public class MetarFragment extends FragmentBase { private final String mAction = NoaaService.ACTION_GET_METAR; private long mElevation; private Location mLocation; private IntentFilter mFilter; private BroadcastReceiver mReceiver; private ArrayList<String> mRemarks; private final int METAR_HOURS_BEFORE = 3; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); mRemarks = new ArrayList<String>(); mFilter = new IntentFilter(); mFilter.addAction(mAction); mReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (mLocation == null) { // This was probably intended for wx list view return; } String action = intent.getAction(); if (action.equals(mAction)) { String type = intent.getStringExtra(NoaaService.TYPE); if (type.equals(NoaaService.TYPE_TEXT)) { showMetar(intent); } } } }; } @Override public void onResume() { LocalBroadcastManager bm = LocalBroadcastManager.getInstance(getActivity()); bm.registerReceiver(mReceiver, mFilter); Bundle args = getArguments(); String stationId = args.getString(NoaaService.STATION_ID); setBackgroundTask(new MetarTask()).execute(stationId); super.onResume(); } @Override public void onPause() { LocalBroadcastManager bm = LocalBroadcastManager.getInstance(getActivity()); bm.unregisterReceiver(mReceiver); super.onPause(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.metar_detail_view, container, false); Button btnGraphic = (Button) view.findViewById(R.id.btnViewGraphic); btnGraphic.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(getActivity(), MetarMapActivity.class); startActivity(intent); } }); return createContentView(view); } private final class MetarTask extends CursorAsyncTask { @Override protected Cursor[] doInBackground(String... params) { String stationId = params[0]; Cursor[] cursors = new Cursor[3]; SQLiteDatabase db = getActivityBase().getDatabase(DatabaseManager.DB_FADDS); SQLiteQueryBuilder builder = new SQLiteQueryBuilder(); builder.setTables(Wxs.TABLE_NAME); String selection = Wxs.STATION_ID + "=?"; Cursor c = builder.query(db, new String[] { "*" }, Wxs.STATION_ID + "=?", new String[] { stationId }, null, null, null, null); cursors[0] = c; String[] wxColumns = new String[] { Awos1.WX_SENSOR_IDENT, Awos1.WX_SENSOR_TYPE, Awos1.STATION_FREQUENCY, Awos1.SECOND_STATION_FREQUENCY, Awos1.STATION_PHONE_NUMBER, Airports.ASSOC_CITY, Airports.ASSOC_STATE }; builder = new SQLiteQueryBuilder(); builder.setTables(Airports.TABLE_NAME + " a" + " LEFT JOIN " + Awos1.TABLE_NAME + " w" + " ON a." + Airports.FAA_CODE + " = w." + Awos1.WX_SENSOR_IDENT); selection = "a." + Airports.ICAO_CODE + "=? AND w." + Awos1.COMMISSIONING_STATUS + "='Y'"; c = builder.query(db, wxColumns, selection, new String[] { stationId }, null, null, null); cursors[1] = c; if (c.moveToFirst()) { String sensorId = c.getString(c.getColumnIndex(Awos1.WX_SENSOR_IDENT)); String sensorType = c.getString(c.getColumnIndex(Awos1.WX_SENSOR_TYPE)); builder = new SQLiteQueryBuilder(); builder.setTables(Awos2.TABLE_NAME); selection = String.format("%s=? AND %s=?", Awos2.WX_SENSOR_IDENT, Awos2.WX_SENSOR_TYPE); c = builder.query(db, new String[] { Awos2.WX_STATION_REMARKS }, selection, new String[] { sensorId, sensorType }, null, null, null); cursors[2] = c; } return cursors; } @Override protected boolean onResult(Cursor[] result) { Cursor wxs = result[0]; if (wxs.moveToFirst()) { mLocation = new Location(""); float lat = wxs.getFloat(wxs.getColumnIndex(Wxs.STATION_LATITUDE_DEGREES)); float lon = wxs.getFloat(wxs.getColumnIndex(Wxs.STATION_LONGITUDE_DEGREES)); mLocation.setLatitude(lat); mLocation.setLongitude(lon); Cursor rmk = result[2]; if (rmk != null && rmk.moveToFirst()) { mRemarks.clear(); do { String remark = rmk.getString(rmk.getColumnIndex(Awos2.WX_STATION_REMARKS)); mRemarks.add(remark); } while (rmk.moveToNext()); } showWxTitle(result); requestMetar(false); } else { UiUtils.showToast(getActivity().getApplicationContext(), "Unable to get weather station info"); getActivity().finish(); } return true; } } protected void requestMetar(boolean refresh) { if (getActivity() == null) { // Not ready to do this yet return; } Bundle args = getArguments(); String stationId = args.getString(NoaaService.STATION_ID); Intent service = new Intent(getActivity(), MetarService.class); service.setAction(mAction); ArrayList<String> stationIds = new ArrayList<String>(); stationIds.add(stationId); service.putExtra(NoaaService.STATION_IDS, stationIds); service.putExtra(NoaaService.TYPE, NoaaService.TYPE_TEXT); service.putExtra(NoaaService.HOURS_BEFORE, METAR_HOURS_BEFORE); service.putExtra(NoaaService.FORCE_REFRESH, refresh); getActivity().startService(service); } protected void showMetar(Intent intent) { if (getActivity() == null) { // Not ready to do this yet return; } Metar metar = (Metar) intent.getSerializableExtra(NoaaService.RESULT); if (metar == null) { return; } View detail = findViewById(R.id.wx_detail_layout); LinearLayout layout = (LinearLayout) findViewById(R.id.wx_status_layout); layout.removeAllViews(); TextView tv = (TextView) findViewById(R.id.status_msg); if (!metar.isValid) { tv.setVisibility(View.VISIBLE); layout.setVisibility(View.VISIBLE); tv.setText("Unable to get METAR for this location"); addRow(layout, "This could be due to the following reasons:"); addBulletedRow(layout, "Network connection is not available"); addBulletedRow(layout, "ADDS does not publish METAR for this station"); addBulletedRow(layout, "Station is currently out of service"); addBulletedRow(layout, "Station has not updated the METAR for more than 3 hours"); detail.setVisibility(View.GONE); stopRefreshAnimation(); setFragmentContentShown(true); return; } else { tv.setText(""); tv.setVisibility(View.GONE); layout.setVisibility(View.GONE); detail.setVisibility(View.VISIBLE); } tv = (TextView) findViewById(R.id.wx_station_info2); WxUtils.setFlightCategoryDrawable(tv, metar.flightCategory); tv = (TextView) findViewById(R.id.wx_age); tv.setText(TimeUtils.formatElapsedTime(metar.observationTime)); // Raw Text tv = (TextView) findViewById(R.id.wx_raw_metar); tv.setText(metar.rawText); // Winds tv = (TextView) findViewById(R.id.wx_wind_label); layout = (LinearLayout) findViewById(R.id.wx_wind_layout); layout.removeAllViews(); int visibility = View.GONE; if (metar.windSpeedKnots < Integer.MAX_VALUE) { showWindInfo(layout, metar); visibility = View.VISIBLE; } tv.setVisibility(visibility); layout.setVisibility(visibility); // Visibility tv = (TextView) findViewById(R.id.wx_vis_label); layout = (LinearLayout) findViewById(R.id.wx_vis_layout); layout.removeAllViews(); visibility = View.GONE; if (metar.visibilitySM < Float.MAX_VALUE) { if (metar.flags.contains(Flags.AutoReport) && metar.visibilitySM == 10) { addRow(layout, "10+ statute miles horizontal"); } else { NumberFormat decimal2 = NumberFormat.getNumberInstance(); decimal2.setMaximumFractionDigits(2); decimal2.setMinimumFractionDigits(0); addRow(layout, String.format("%s statute miles horizontal", FormatUtils.formatNumber(metar.visibilitySM))); } if (metar.vertVisibilityFeet < Integer.MAX_VALUE) { addRow(layout, String.format("%s vertical", FormatUtils.formatFeetAgl(metar.vertVisibilityFeet))); } visibility = View.VISIBLE; } tv.setVisibility(visibility); layout.setVisibility(visibility); // Weather layout = (LinearLayout) findViewById(R.id.wx_weather_layout); layout.removeAllViews(); for (WxSymbol wx : metar.wxList) { addWeatherRow(layout, wx, metar.flightCategory); } // Sky Conditions tv = (TextView) findViewById(R.id.wx_sky_cond_label); layout = (LinearLayout) findViewById(R.id.wx_sky_cond_layout); layout.removeAllViews(); visibility = View.GONE; if (!metar.skyConditions.isEmpty()) { for (SkyCondition sky : metar.skyConditions) { addSkyConditionRow(layout, sky, metar.flightCategory); } visibility = View.VISIBLE; } tv.setVisibility(visibility); layout.setVisibility(visibility); // Temperature tv = (TextView) findViewById(R.id.wx_temp_label); layout = (LinearLayout) findViewById(R.id.wx_temp_layout); layout.removeAllViews(); visibility = View.GONE; if (metar.tempCelsius < Float.MAX_VALUE && metar.dewpointCelsius < Float.MAX_VALUE) { addRow(layout, "Temperature", FormatUtils.formatTemperature(metar.tempCelsius)); if (metar.dewpointCelsius < Float.MAX_VALUE) { addRow(layout, "Dew point", FormatUtils.formatTemperature(metar.dewpointCelsius)); addRow(layout, "Relative humidity", String.format("%.0f%%", WxUtils.getRelativeHumidity(metar))); long denAlt = WxUtils.getDensityAltitude(metar); if (denAlt > mElevation) { addRow(layout, "Density altitude", FormatUtils.formatFeet(denAlt)); } } else { addRow(layout, "Dew point", "n/a"); } if (metar.maxTemp6HrCentigrade < Float.MAX_VALUE) { addRow(layout, "6-hour maximum", FormatUtils.formatTemperature(metar.maxTemp6HrCentigrade)); } if (metar.minTemp6HrCentigrade < Float.MAX_VALUE) { addRow(layout, "6-hour minimum", FormatUtils.formatTemperature(metar.minTemp6HrCentigrade)); } if (metar.maxTemp24HrCentigrade < Float.MAX_VALUE) { addRow(layout, "24-hour maximum", FormatUtils.formatTemperature(metar.maxTemp24HrCentigrade)); } if (metar.minTemp24HrCentigrade < Float.MAX_VALUE) { addRow(layout, "24-hour minimum", FormatUtils.formatTemperature(metar.minTemp24HrCentigrade)); } visibility = View.VISIBLE; } tv.setVisibility(visibility); layout.setVisibility(visibility); // Pressure tv = (TextView) findViewById(R.id.wx_pressure_label); layout = (LinearLayout) findViewById(R.id.wx_pressure_layout); layout.removeAllViews(); visibility = View.GONE; if (metar.altimeterHg < Float.MAX_VALUE) { addRow(layout, "Altimeter", FormatUtils.formatAltimeter(metar.altimeterHg)); if (metar.seaLevelPressureMb < Float.MAX_VALUE) { addRow(layout, "Sea level pressure", String.format("%s mb", FormatUtils.formatNumber(metar.seaLevelPressureMb))); } long presAlt = WxUtils.getPressureAltitude(metar); if (presAlt > mElevation) { addRow(layout, "Pressure altitude", FormatUtils.formatFeet(presAlt)); } if (metar.pressureTend3HrMb < Float.MAX_VALUE) { addRow(layout, "3-hour tendency", String.format("%+.2f mb", metar.pressureTend3HrMb)); } if (metar.presfr) { addRow(layout, "Pressure falling rapidly"); } if (metar.presrr) { addRow(layout, "Pressure rising rapidly"); } visibility = View.VISIBLE; } tv.setVisibility(visibility); layout.setVisibility(visibility); // Precipitation tv = (TextView) findViewById(R.id.wx_precip_label); layout = (LinearLayout) findViewById(R.id.wx_precip_layout); layout.removeAllViews(); if (metar.precipInches < Float.MAX_VALUE) { addRow(layout, "1-hour precipitation", String.format("%.2f\"", metar.precipInches)); } if (metar.precip3HrInches < Float.MAX_VALUE) { addRow(layout, "3-hour precipitation", String.format("%.2f\"", metar.precip3HrInches)); } if (metar.precip6HrInches < Float.MAX_VALUE) { addRow(layout, "6-hour precipitation", String.format("%.2f\"", metar.precip6HrInches)); } if (metar.precip24HrInches < Float.MAX_VALUE) { addRow(layout, "24-hour precipitation", String.format("%.2f\"", metar.precip24HrInches)); } if (metar.snowInches < Float.MAX_VALUE) { addRow(layout, "Snow depth", String.format("%.0f\"", metar.snowInches)); } if (metar.snincr) { addRow(layout, "Snow is increasing rapidly"); } visibility = layout.getChildCount() > 0 ? View.VISIBLE : View.GONE; tv.setVisibility(visibility); layout.setVisibility(visibility); // Remarks tv = (TextView) findViewById(R.id.wx_remarks_label); layout = (LinearLayout) findViewById(R.id.wx_remarks_layout); layout.removeAllViews(); for (Flags flag : metar.flags) { addBulletedRow(layout, flag.toString()); } for (String remark : mRemarks) { addBulletedRow(layout, remark); } visibility = layout.getChildCount() > 0 ? View.VISIBLE : View.GONE; tv.setVisibility(visibility); layout.setVisibility(visibility); // Fetch time tv = (TextView) findViewById(R.id.wx_fetch_time); tv.setText("Fetched on " + TimeUtils.formatDateTime(getActivity(), metar.fetchTime)); tv.setVisibility(View.VISIBLE); stopRefreshAnimation(); setFragmentContentShown(true); } protected String getWindsDescription(Metar metar) { StringBuilder s = new StringBuilder(); if (metar.windDirDegrees == 0 && metar.windSpeedKnots == 0) { s.append("Winds are calm"); } else if (metar.windDirDegrees == 0) { s.append(String.format("Winds variable at %d knots", metar.windSpeedKnots)); } else { s.append(String.format("From %s (%s true) at %d knots", GeoUtils.getCardinalDirection(metar.windDirDegrees), FormatUtils.formatDegrees(metar.windDirDegrees), metar.windSpeedKnots)); if (metar.windGustKnots < Integer.MAX_VALUE) { s.append(String.format(" gusting to %d knots", metar.windGustKnots)); } if (metar.windPeakKnots < Integer.MAX_VALUE && metar.windPeakKnots != metar.windGustKnots) { s.append(String.format(", peak at %d knots", metar.windPeakKnots)); } } return s.toString(); } protected void showWindInfo(LinearLayout layout, Metar metar) { View row = addRow(layout, getWindsDescription(metar)); TextView tv = (TextView) row.findViewById(R.id.item_label); if (metar.windDirDegrees > 0) { float declination = GeoUtils.getMagneticDeclination(mLocation); Drawable wind = WxUtils.getWindBarbDrawable(tv.getContext(), metar, declination); tv.setCompoundDrawablesWithIntrinsicBounds(wind, null, null, null); tv.setCompoundDrawablePadding(UiUtils.convertDpToPx(getActivity(), 6)); } if (metar.windGustKnots < Integer.MAX_VALUE) { double gustFactor = metar.windGustKnots - metar.windSpeedKnots; addRow(layout, String.format("Add %d knots to your normal approach speed", Math.round(gustFactor / 2))); } if (metar.wshft) { StringBuilder sb = new StringBuilder(); sb.append("Wind shift of 45\u00B0 or more detected during past hour"); if (metar.fropa) { sb.append(" due to frontal passage"); } addRow(layout, sb.toString()); } } protected void addSkyConditionRow(LinearLayout layout, SkyCondition sky, String flightCategory) { View row = addRow(layout, sky.toString()); TextView tv = (TextView) row.findViewById(R.id.item_label); WxUtils.showColorizedDrawable(tv, flightCategory, sky.getDrawable()); } protected void addWeatherRow(LinearLayout layout, WxSymbol wx, String flightCategory) { View row = addRow(layout, wx.toString()); if (wx.getDrawable() != 0) { TextView tv = (TextView) row.findViewById(R.id.item_label); WxUtils.showColorizedDrawable(tv, flightCategory, wx.getDrawable()); } } @Override public void onPrepareOptionsMenu(Menu menu) { DrawerActivityBase activity = (DrawerActivityBase) getActivity(); setRefreshItemVisible(!activity.isDrawerOpen()); } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle item selection switch (item.getItemId()) { case R.id.menu_refresh: startRefreshAnimation(); requestMetar(true); return true; default: return super.onOptionsItemSelected(item); } } }