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package com.agup.gps.controllers; /*w w w. j av a2 s .c o m*/ import java.util.Locale; import java.util.concurrent.TimeUnit; import com.agup.gps.GPSTesterActivity; import com.agup.gps.R; import com.agup.gps.R.id; import com.agup.gps.utils.ElapsedTimer; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.Color; import android.location.GpsSatellite; import android.location.GpsStatus; import android.location.GpsStatus.NmeaListener; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.AsyncTask; import android.os.Bundle; import android.os.Looper; import android.preference.PreferenceManager; import android.text.Html; import android.util.Log; import android.view.View; import android.view.WindowManager; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; /** * NOTE: Listening to GPS status and NMEA is very resource intensive. That's why * this has it's own dedicated view. Related to this, I've noticed delays when * switching back to the main view. * * @author Andy Gup * */ public class SatelliteDataActivityController { private static LocationListener _locationListenerGPSProvider = null; private static LocationManager _locationManager = null; private static Activity _activity = null; private static ElapsedTimer _elapsedTimer; private static TextView _gpsSatelliteTextView; private TextView _gpsNMEATextView; private static SharedPreferences _preferences; private ImageView _imMainActivity; private static Button _startButton; private static Button _pauseButton; private static Button _emailButton; private String _satelliteList = ""; private String _gpsNMEAText = ""; private static NmeaListener _nmeaListener = null; private static GpsStatus.Listener _gpsStatusListener = null; private static Iterable<GpsSatellite> _satellites = null; private final static String _format = String.format(Locale.getDefault(),"%%0%dd", 2); public SatelliteDataActivityController(Activity activity){ _activity = activity; _elapsedTimer = new ElapsedTimer(); _gpsNMEATextView = (TextView) _activity.findViewById(R.id.gpsNMEAInfo); _gpsSatelliteTextView = (TextView) _activity.findViewById(R.id.gpsSatelliteInfo); _preferences = PreferenceManager.getDefaultSharedPreferences(_activity); _imMainActivity = (ImageView) _activity.findViewById(R.id.backToMainActivity); _startButton = (Button)_activity.findViewById(R.id.StartSatButton); _pauseButton = (Button) _activity.findViewById(R.id.PauseSatButton); _emailButton = (Button) _activity.findViewById(R.id.EmailSatButton); setUI(); } private void setUI(){ //Keep screen awake _activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); String gpsNMEAText = "<b><font color='yellow'>GPS NMEA</b></font>" + "<br><b>Timestamp:</b> N/A" + "<br><b>NMEA code:</b> N/A"; String gpsSatelliteText = "<b><font color='yellow'>GPS Satellite</b></font>" + "<br><b>Number of Satellites:</b> N/A" + "<br><b>Satellite 0:</b> N/A" + "<br><b>Satellite 1:</b> N/A"; _gpsNMEATextView.setText(Html.fromHtml(gpsNMEAText)); _gpsSatelliteTextView.setText(Html.fromHtml(gpsSatelliteText)); _imMainActivity.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent i = new Intent(_activity.getApplicationContext(),GPSTesterActivity.class); _activity.startActivity(i); } }); _startButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(_locationManager == null){ startLocation(); } else{ stopLocation(); } } }); _pauseButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { pauseLocation(); } }); _emailButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { pauseLocation(); Intent shareIntent = new Intent(android.content.Intent.ACTION_SEND); shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Android Satellite Data"); shareIntent.setType("plain/text"); shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, _satelliteList + "<br><br>" + _gpsNMEAText); _activity.startActivity(shareIntent); } }); } private void setLocationListenerGPSProvider(){ _locationListenerGPSProvider = new LocationListener() { @Override public void onLocationChanged(Location location) { // TODO Auto-generated method stub } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String provider) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub } }; _nmeaListener = new GpsStatus.NmeaListener() { @Override public void onNmeaReceived(long timestamp, String nmea) { String time = _elapsedTimer.convertMillisToMDYHMSS(timestamp); _gpsNMEAText = "<b><font color='yellow'>GPS NMEA</b></font>" + "<br><b>Timestamp:</b> " + time + "<br><b>NMEA code:</b> " + nmea; _gpsNMEATextView.setText(Html.fromHtml(_gpsNMEAText)); } }; _locationManager.addNmeaListener(_nmeaListener); _gpsStatusListener = new GpsStatus.Listener() { String seconds; String minutes; String hours; String ms; String satelliteHMS; String usedInFix = "false"; int t; @Override public void onGpsStatusChanged(int event) { _satelliteList = ""; satelliteHMS = "N/A"; //Occasionally there may be null values if GPS hiccups try{ t = _locationManager.getGpsStatus(null).getTimeToFirstFix(); //String seconds = String.format(_format, t/1000 % 60); seconds = String.format(_format, TimeUnit.MILLISECONDS.toSeconds(t)); minutes = String.format(_format, TimeUnit.MILLISECONDS.toMinutes(t)); hours = String.format(_format, TimeUnit.MILLISECONDS.toHours(t)); ms = String.format(_format, t % 1000); satelliteHMS = hours + ":" + minutes + ":" + seconds + ":" + ms; _satellites = _locationManager.getGpsStatus(null).getSatellites(); if(_satellites != null){ for(GpsSatellite sat: _satellites ){ if(sat.usedInFix() == true){ usedInFix = "<font color='red'>true</font>"; } else{ usedInFix = "false"; } _satelliteList = _satelliteList + "<br>" + sat.getPrn() + ", " + sat.getSnr() + ", " + usedInFix; } } } catch(Exception exc){ Log.d("GPSTester", "GPS Status error (onGpsStatusChanged): " + exc.getMessage()); } if( _satelliteList != ""){ _gpsSatelliteTextView.setText(Html.fromHtml( "<b><font color='yellow'>GPS Satellite Info (No., SNR, Used in fix)</b></font>" + "<br><b>Time to 1st fix:</b> " + satelliteHMS + _satelliteList)); } } }; _locationManager.addGpsStatusListener(_gpsStatusListener); try{ long minDistance = Long.valueOf(_preferences.getString("pref_key_updateGPSMinDistance", "0")); long minTime = Long.valueOf(_preferences.getString("pref_key_updateGPSMinTime", "0")); // Register the listener with the Location Manager to receive location updates _locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, minTime, minDistance, _locationListenerGPSProvider); } catch(Exception exc){ Log.d("GPSTester", "Unable to start GPS provider. Bad value. " + exc.getMessage()); } } public void startLocation(){ if(_locationManager == null){ if(_startButton != null){ _startButton.setTextColor(Color.RED); _startButton.setText("Stop"); } _locationManager = (LocationManager) _activity.getSystemService(Context.LOCATION_SERVICE); Boolean gpsProviderEnabled = _locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); if(gpsProviderEnabled){ setLocationListenerGPSProvider(); } } else{ Log.d("GPSTester","GPS Provider not enabled. Unable to set location listener."); } } public void stopLocation(){ if(_locationManager != null){ if(_startButton != null){ _startButton.setTextColor(Color.WHITE); _startButton.setText("Start"); } if(_nmeaListener != null){ _locationManager.removeNmeaListener(_nmeaListener); _nmeaListener = null; } if(_gpsStatusListener != null){ _locationManager.removeGpsStatusListener(_gpsStatusListener); _gpsStatusListener = null; } if(_locationListenerGPSProvider != null){ _locationManager.removeUpdates(_locationListenerGPSProvider); _locationManager = null; } } if(_locationListenerGPSProvider != null) { _locationListenerGPSProvider = null; } } public void pauseLocation(){ String startButtonText = _startButton.getText().toString(); if(_locationManager != null && startButtonText == "Stop"){ _pauseButton.setTextColor(Color.RED); if(_locationListenerGPSProvider != null){ _locationManager.removeUpdates(_locationListenerGPSProvider); _locationManager = null; } if(_locationListenerGPSProvider != null) { _locationListenerGPSProvider = null; } if(_gpsStatusListener != null){ _gpsStatusListener = null; } if(_nmeaListener != null){ _nmeaListener = null; } } else if(_locationManager == null && startButtonText == "Stop"){ _pauseButton.setTextColor(Color.WHITE); _elapsedTimer.unpauseTimer(); _locationManager = (LocationManager) _activity.getSystemService(Context.LOCATION_SERVICE); Boolean gpsProviderEnabled = _locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); if(gpsProviderEnabled == true && _preferences.getBoolean("pref_key_gps", true) == true){ setLocationListenerGPSProvider(); } else{ Log.d("GPSTester","GPS Provider not enabled. Unable to set location listener."); } gpsProviderEnabled = null; } } }