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 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.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.view.ViewGroup.LayoutParams; import android.widget.Button; import android.widget.LinearLayout; import android.widget.RelativeLayout; import android.widget.TextView; import com.nadmm.airports.DatabaseManager; 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.wx.AirSigmet.AirSigmetEntry; public class AirSigmetFragment extends FragmentBase { private final String mAction = NoaaService.ACTION_GET_AIRSIGMET; private final int AIRSIGMET_RADIUS_NM = 50; private final int AIRSIGMET_HOURS_BEFORE = 3; private Location mLocation; private IntentFilter mFilter; private BroadcastReceiver mReceiver; private String mStationId; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); mFilter = new IntentFilter(); mFilter.addAction(mAction); mReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals(mAction)) { String type = intent.getStringExtra(NoaaService.TYPE); if (type.equals(NoaaService.TYPE_TEXT)) { showAirSigmetText(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 AirSigmetTask()).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.airsigmet_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(), AirSigmetMapActivity.class); startActivity(intent); } }); return createContentView(view); } @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(); requestAirSigmetText(true); return true; default: return super.onOptionsItemSelected(item); } } private final class AirSigmetTask extends CursorAsyncTask { @Override protected Cursor[] doInBackground(String... params) { String stationId = params[0]; Cursor[] cursors = new Cursor[1]; SQLiteDatabase db = getDbManager().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[] { "*" }, selection, new String[] { stationId }, null, null, null, null); cursors[0] = c; return cursors; } @Override protected boolean onResult(Cursor[] result) { Cursor wxs = result[0]; if (wxs.moveToFirst()) { mStationId = wxs.getString(wxs.getColumnIndex(Wxs.STATION_ID)); 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); // Now request the airmet/sigmet requestAirSigmetText(false); } return true; } } protected void requestAirSigmetText(boolean refresh) { double[] box = GeoUtils.getBoundingBoxDegrees(mLocation, AIRSIGMET_RADIUS_NM); Intent service = new Intent(getActivity(), AirSigmetService.class); service.setAction(mAction); service.putExtra(NoaaService.STATION_ID, mStationId); service.putExtra(NoaaService.TYPE, NoaaService.TYPE_TEXT); service.putExtra(NoaaService.COORDS_BOX, box); service.putExtra(NoaaService.HOURS_BEFORE, AIRSIGMET_HOURS_BEFORE); service.putExtra(NoaaService.FORCE_REFRESH, refresh); getActivity().startService(service); } protected void showAirSigmetText(Intent intent) { if (getActivity() == null) { return; } AirSigmet airSigmet = (AirSigmet) intent.getSerializableExtra(NoaaService.RESULT); LinearLayout layout = (LinearLayout) findViewById(R.id.airsigmet_entries_layout); if (layout == null) { return; } layout.removeAllViews(); TextView tv = (TextView) findViewById(R.id.airsigmet_title_msg); if (!airSigmet.entries.isEmpty()) { tv.setText(String.format("%d AIR/SIGMETs reported within %d NM of %s in" + " last %d hours", airSigmet.entries.size(), AIRSIGMET_RADIUS_NM, mStationId, AIRSIGMET_HOURS_BEFORE)); for (AirSigmetEntry entry : airSigmet.entries) { showAirSigmetEntry(layout, entry); } } else { tv.setText(String.format("No AIR/SIGMETs reported within %d NM of %s in" + " last %d hours", AIRSIGMET_RADIUS_NM, mStationId, AIRSIGMET_HOURS_BEFORE)); } tv = (TextView) findViewById(R.id.wx_fetch_time); tv.setText("Fetched on " + TimeUtils.formatDateTime(getActivity(), airSigmet.fetchTime)); tv.setVisibility(View.VISIBLE); stopRefreshAnimation(); setFragmentContentShown(true); } protected void showAirSigmetEntry(LinearLayout layout, AirSigmetEntry entry) { RelativeLayout item = (RelativeLayout) inflate(R.layout.airsigmet_detail_item); TextView tv = (TextView) item.findViewById(R.id.airsigmet_type); tv.setText(entry.type); tv = (TextView) item.findViewById(R.id.wx_raw_airsigmet); tv.setText(entry.rawText); tv = (TextView) item.findViewById(R.id.airsigmet_time); tv.setText(TimeUtils.formatDateRange(getActivity(), entry.fromTime, entry.toTime)); LinearLayout details = (LinearLayout) item.findViewById(R.id.airsigmet_details); if (entry.hazardType != null && entry.hazardType.length() > 0) { addRow(details, "Type", entry.hazardType); } if (entry.hazardSeverity != null && entry.hazardSeverity.length() > 0) { addRow(details, "Severity", entry.hazardSeverity); } if (entry.minAltitudeFeet < Integer.MAX_VALUE || entry.maxAltitudeFeet < Integer.MAX_VALUE) { addRow(details, "Altitude", FormatUtils.formatFeetRangeMsl(entry.minAltitudeFeet, entry.maxAltitudeFeet)); } if (entry.movementDirDegrees < Integer.MAX_VALUE) { StringBuilder sb = new StringBuilder(); sb.append(String.format("%s (%s)", FormatUtils.formatDegrees(entry.movementDirDegrees), GeoUtils.getCardinalDirection(entry.movementDirDegrees))); if (entry.movementSpeedKnots < Integer.MAX_VALUE) { sb.append(String.format(" at %d knots", entry.movementSpeedKnots)); } addRow(details, "Movement", sb.toString()); } layout.addView(item, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); } }