Java tutorial
/* * * This is the start-up main file for the application * This application requires (and has been compiled with) Google Play Service rev. 13 * MyRepeater Finder Copyright 2016 Mohammad Hafiz bin Ismail <mypapit@gmail.com> http://blog.mypapit.net/ https://github.com/mypapit/repeater-my This file is part of MyRepeater Finder. MyRepeater Finder 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. MyRepeater Finder 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 MyRepeater Finder. If not, see <http://www.gnu.org/licenses/>. */ package net.mypapit.mobile.myrepeater; import garin.artemiy.compassview.library.CompassSensorsActivity; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.math.BigInteger; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.Locale; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; import com.google.android.gms.maps.model.LatLng; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.app.SearchManager; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.location.Address; import android.location.Criteria; import android.location.Geocoder; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.location.LocationProvider; import android.os.Build; import android.os.Bundle; import android.os.Looper; import android.preference.PreferenceManager; import android.text.TextUtils; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ImageView; import android.widget.ListView; import android.widget.SearchView; import android.widget.TextView; import android.widget.Toast; import au.com.bytecode.opencsv.CSVReader; import java.security.SecureRandom; public class RepeaterListActivity extends CompassSensorsActivity implements OnItemClickListener { Repeater xlocation; RepeaterAdapter adapter; RepeaterList rl; private ListView lv; private TextView tvAddress; private static int static_distance = 0; private boolean excludeLink = false; private boolean excludeDirection = false; private float local_distance = 100.0f; private boolean mrefresh = true; private String m_callsign = "9W-newbie"; private String m_handle = "Mr Newbie"; private double m_qsx = 145.000; private String m_status = "no status"; private int m_passcode = 0; private String m_phoneno = "+60120000"; private static final String URL_API = "http://api.repeater.my/v1/endp.php"; private static final float LAT_DEFAULT = 37.5651f; private static final float LNG_DEFAULT = 126.98955f; // device id, once assigned, never changes private static String m_deviceid; // please change this to reflect walkthrough updates protected static final int WALK_VERSION_CODE = 210; // StackHistory stackhistory; @Override public void onCreate(Bundle bundle) { super.onCreate(bundle); setContentView(R.layout.repeater_list); overridePendingTransition(R.anim.activity_open_translate, R.anim.activity_close_scale); lv = (ListView) findViewById(R.id.repeaterListView); tvAddress = (TextView) findViewById(R.id.tvAddress); xlocation = new Repeater("", LAT_DEFAULT, LNG_DEFAULT); rl = RepeaterListActivity.loadData(R.raw.repeaterdata5, this); xlocation.calcDistanceAll(rl); rl.sort(); adapter = new RepeaterAdapter(this, rl, xlocation, local_distance, excludeLink, excludeDirection); lv.setFastScrollEnabled(true); lv.setVerticalFadingEdgeEnabled(false); lv.setVerticalScrollBarEnabled(true); lv.setTextFilterEnabled(true); lv.setOnItemClickListener(this); // SharedPreferences prefs = getSharedPreferences("Location", // MODE_PRIVATE); SharedPreferences prefshare = PreferenceManager.getDefaultSharedPreferences(this); int walkcount = prefshare.getInt("walkthrough", WALK_VERSION_CODE); if (walkcount < (WALK_VERSION_CODE + 1)) { Intent intent = new Intent(); intent.setClassName(getApplicationContext(), "net.mypapit.mobile.myrepeater.SettingsActivity"); startActivity(intent); intent.setClassName(getApplicationContext(), "net.mypapit.mobile.myrepeater.WalkthroughActivity"); SharedPreferences.Editor prefEditor = prefshare.edit(); walkcount++; SharedPreferences repeater_prefs = PreferenceManager.getDefaultSharedPreferences(this); m_deviceid = repeater_prefs.getString("deviceid", this.generateCallsign()); prefEditor.putInt("walkthrough", walkcount); // prefEditor.putString("callsign", new // StringBuilder("9W2-").append(this.generateCallsign()).toString()); prefEditor.putString("deviceid", m_deviceid); prefEditor.commit(); startActivity(intent); } // need to put token to avoid app from popping up annoying select manual // dialog will be triggered if location/gps is not enabled AND if the // date in dd/MM is not equal to 'token' saved in StaticLocationActivity // location dialog SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM", Locale.US); Date date = new Date(); SharedPreferences preftoken = getSharedPreferences("Location", MODE_PRIVATE); if (!this.isLocationEnabled(this) && !dateFormat.format(date).equalsIgnoreCase(preftoken.getString("token", "28/10"))) { // show dialog if Location Services is not enabled AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(R.string.gps_not_found_title); // GPS not found builder.setMessage(R.string.gps_not_found_message); // Want to // enable? // if yes - bring user to enable Location Service settings builder.setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialogInterface, int i) { Intent intent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); getApplicationContext().startActivity(intent); } }); // if no - bring user to selecting Static Location Activity builder.setNegativeButton(R.string.no, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Intent intent = new Intent(); intent.setClassName(getApplicationContext(), "net.mypapit.mobile.myrepeater.StaticLocationActivity"); startActivity(intent); } }); builder.create().show(); } new GPSThread(this).start(); lv.setAdapter(adapter); } public void onStart() { super.onStart(); if (mrefresh) { this.refreshList(); } excludeDirection = checkCompassSensor(xlocation); } public void refreshList() { SharedPreferences repeater_prefs = PreferenceManager.getDefaultSharedPreferences(this); excludeLink = repeater_prefs.getBoolean("excludeLinkRepeater", false); m_deviceid = repeater_prefs.getString("deviceid", this.generateCallsign()); m_callsign = repeater_prefs.getString("callsign", "9W2-" + this.generateCallsign()); m_handle = repeater_prefs.getString("handle", "Newbie (" + this.generateCallsign().substring(0, 4) + ")"); m_status = repeater_prefs.getString("status", "no status"); m_qsx = Double.parseDouble(repeater_prefs.getString("qsx", "145.00")); m_phoneno = repeater_prefs.getString("phoneno", "+60120000"); try { m_passcode = Integer.parseInt(repeater_prefs.getString("passcode", "0")); } catch (NumberFormatException nfe) { m_passcode = 0; } catch (Exception ex) { m_passcode = 0; } local_distance = repeater_prefs.getInt("range", 100); adapter = new RepeaterAdapter(this, rl, xlocation, local_distance, excludeLink, excludeDirection); mrefresh = false; lv.setAdapter(adapter); } class GPSThread extends Thread { private RepeaterListActivity activity; private String bestProvider; private String m_address; // addressLocality = new AddressLocality[1]; public GPSThread(RepeaterListActivity activity) { this.activity = activity; m_address = new String("Unknown Address"); } public String geoCode(double lat, double lon) { Geocoder geocoder = new Geocoder(activity, Locale.getDefault()); List<Address> addressList = null; String[] addressLocality = new String[2]; try { addressList = geocoder.getFromLocation(lat, lon, 3); Log.d("new.mypapit.mobile", "inside geocoder Lat: " + lat + "Lon: " + lon); // if there are no address retrieved, put in Unknown Address if (addressList == null) { Log.d("net.mypapit.mobile", "Unknown Location"); addressLocality[0] = new String("Unknown Location"); return addressLocality[0]; } else if (addressList.size() > 0) { // else if there are addresses retrieved int addressCounter = addressList.size(); addressLocality = new String[addressCounter]; addressLocality[0] = new String(); // get the first address, and then store only the locality // such as State or Municipal/Country/Territory Address singleAddress = addressList.get(0); addressLocality[0] = singleAddress.getLocality(); } } catch (IllegalArgumentException iae) { Log.d("net.mypapit.mobile", "Invalid GPS coordinates : " + iae.getMessage() + " caused by: " + iae.getCause()); addressLocality[0] = new String("Unknown Location"); } catch (IOException ioe) { Log.d("net.mypapit.mobile", "Geocoder IO exception " + ioe.toString()); addressLocality[0] = new String("Unknown Location"); } Log.e("net.mypapit.mobile", "geocode address: " + addressLocality[0]); return addressLocality[0]; } @Override public void run() { LocationManager locationManager; locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); Criteria criteria = new Criteria(); criteria.setAccuracy(Criteria.ACCURACY_COARSE); criteria.setSpeedRequired(false); /* * criteria.setSpeedRequired(false); * criteria.setAltitudeRequired(false); * criteria.setHorizontalAccuracy(Criteria.NO_REQUIREMENT); * criteria.setCostAllowed(true); * criteria.setVerticalAccuracy(Criteria.NO_REQUIREMENT); */ Looper.prepare(); bestProvider = locationManager.getBestProvider(criteria, false); Location location = locationManager.getLastKnownLocation(bestProvider); // if couldn't get Location Provider (aka couldn't get coordinates, // try GPS if (location == null) { location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); } // if couldn't get Location Provider (aka couldn't get coordinates, // try Network if (location == null) { location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); } if (location == null) { excludeDirection = true; } // if couldn't get Location Provider (aka couldn't get coordinates, // try set 37.56, 126.989 as coordinate and be done with it (Seoul, // Korea) if (location == null) { location = new Location(""); SharedPreferences prefs = getSharedPreferences("Location", MODE_PRIVATE); float lat = prefs.getFloat("DefaultLat", LAT_DEFAULT); float lon = prefs.getFloat("DefaultLon", LNG_DEFAULT); excludeDirection = true; location.setLatitude(lat); location.setLongitude(lon); xlocation = new Repeater("Simulated", location.getLatitude(), location.getLongitude()); m_address = "Simulated: " + this.geoCode(lat, lon); activity.runOnUiThread(new Runnable() { @Override public void run() { activity.showToast("Unable to detect location, falling back to preset location"); } }); } else { xlocation = new Repeater(location.getProvider(), location.getLatitude(), location.getLongitude()); m_address = this.geoCode(location.getLatitude(), location.getLongitude()); excludeDirection = checkCompassSensor(xlocation); activity.showToast("Location detected, listing nearby repeaters"); } if (xlocation != null) { // check again for compassSensor activity.showToast("Using location sensor: " + xlocation.getProvider()); } else { // else if xlocation == null, get coordinate stored in Manual // Location setting SharedPreferences prefs = getSharedPreferences("Location", MODE_PRIVATE); float lat = prefs.getFloat("DefaultLat", LAT_DEFAULT); float lon = prefs.getFloat("DefaultLon", LNG_DEFAULT); excludeDirection = true; xlocation = new Repeater("Simulated", lat, lon); m_address = "Auto Location Services Disabled"; } activity.runOnUiThread(new Runnable() { @Override public void run() { xlocation.calcDistanceAll(rl); rl.sort(); if (xlocation.getProvider().equalsIgnoreCase("Simulated")) { excludeDirection = true; } adapter = new RepeaterAdapter(activity, rl, xlocation, local_distance, excludeLink, excludeDirection); activity.setAddress(m_address); activity.setListAdapter(adapter); Log.d("latitud mypapit", "Geo: " + xlocation.getLatitude()); Log.d("latitud mypapit", "Address: " + m_address); adapter.notifyDataSetChanged(); } } ); LocationListener myLocationListener = new LocationListener() { String m_location2 = null; @Override public void onLocationChanged(final Location location) { final double lat = location.getLatitude(); final double lon = location.getLongitude(); if (location.getProvider().equalsIgnoreCase("Simulated")) { excludeDirection = true; } else { excludeDirection = checkCompassSensor(xlocation); } Thread kthread = new Thread(new Runnable() { String versionName = "local/1.0"; @Override public void run() { m_location2 = geoCode(lat, lon); HttpClient client = new DefaultHttpClient(); HttpPost post = new HttpPost(URL_API); try { versionName = getPackageManager().getPackageInfo(getPackageName(), 0).versionName; } catch (NameNotFoundException nnfe) { } try { Log.d("http mypapit", "sending data"); List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(16); nameValuePairs.add(new BasicNameValuePair("apiver", "1")); nameValuePairs .add(new BasicNameValuePair("passcode", Integer.toString(m_passcode))); nameValuePairs.add(new BasicNameValuePair("name", m_handle)); nameValuePairs.add(new BasicNameValuePair("callsign", m_callsign)); nameValuePairs.add(new BasicNameValuePair("lat", Double.toString(lat))); nameValuePairs.add(new BasicNameValuePair("lng", Double.toString(lon))); nameValuePairs.add(new BasicNameValuePair("status", m_status)); nameValuePairs.add(new BasicNameValuePair("datetime", Long.toString(System.currentTimeMillis() / 1000l))); nameValuePairs .add(new BasicNameValuePair("device", Build.PRODUCT + " " + Build.MODEL)); nameValuePairs.add(new BasicNameValuePair("client", "Repeater.MY/" + versionName)); nameValuePairs.add(new BasicNameValuePair("qsx", Double.toString(m_qsx))); nameValuePairs.add(new BasicNameValuePair("locality", m_location2)); nameValuePairs.add(new BasicNameValuePair("deviceid", m_deviceid)); nameValuePairs.add(new BasicNameValuePair("phoneno", m_phoneno)); post.setEntity(new UrlEncodedFormEntity(nameValuePairs)); HttpResponse response = client.execute(post); // debugging HttpEntity entity = response.getEntity(); InputStream inputstream = entity.getContent(); BufferedReader reader = new BufferedReader( new InputStreamReader(inputstream, "UTF-8"), 16); StringBuilder sbuilder = new StringBuilder(""); sbuilder.append(reader.readLine()); String line = "0"; while ((line = reader.readLine()) != null) { sbuilder.append(line + "\n"); } inputstream.close(); String result = sbuilder.toString(); Log.d("http mypapit", "Output: " + result); } catch (IOException err) { Log.d("http mypapit", "Error HTTP Client : " + err.getMessage()); // err.printStackTrace(); } activity.runOnUiThread(new Runnable() { @Override public void run() { xlocation = new Repeater("", lat, lon); xlocation.calcDistanceAll(rl); rl.sort(); adapter = new RepeaterAdapter(activity, rl, xlocation, local_distance, excludeLink, excludeDirection); if (m_location2 != null) { activity.setAddress(m_location2); } else { activity.setAddress("Couldn't detect address"); } activity.setListAdapter(adapter); adapter.notifyDataSetChanged(); Log.d("latitud papit", "Geo: " + xlocation.getLatitude()); // http post } } ); } }, "on changed location thread"); kthread.start(); } @Override public void onProviderDisabled(String provider) { // tvAddress.setText("Auto Location Service Disabled"); final String mProvider = provider; activity.runOnUiThread(new Runnable() { @Override public void run() { activity.showToast("Location sensor: " + mProvider + " disabled"); activity.excludeDirection = true; } }); } @Override public void onProviderEnabled(String provider) { final String mProvider = provider; activity.runOnUiThread(new Runnable() { @Override public void run() { activity.showToast("Location sensor: " + mProvider + " re-enabled"); activity.excludeDirection = false; } }); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { switch (status) { case LocationProvider.OUT_OF_SERVICE: activity.showToast("Location sensor: " + provider + " out-of-service :("); break; case LocationProvider.TEMPORARILY_UNAVAILABLE: activity.showToast("Location sensor: " + provider + " temporarily unavailable"); break; } } }; Log.d("Best Provider mypapit", "Best Provider: " + bestProvider); locationManager.requestLocationUpdates(bestProvider, 65000, static_distance, myLocationListener); Looper.loop(); } } public static RepeaterList loadData(int resource, Activity activity) { RepeaterList mlist = new RepeaterList(150); int line = 0; try { InputStreamReader is = new InputStreamReader(activity.getResources().openRawResource(resource)); BufferedReader in = new BufferedReader(is); CSVReader csv = new CSVReader(in, ';', '\"', 0); String data[]; while ((data = csv.readNext()) != null) { line++; mlist.add(new Repeater("", data[1], data[2], data[3], data[9], Double.parseDouble(data[4]), Double.parseDouble(data[5]), Double.parseDouble(data[6]), Double.parseDouble(data[7]), Double.parseDouble(data[8]))); } in.close(); } catch (IOException ioe) { Log.e("Read CSV Error mypapit", "Some CSV Error: ", ioe.getCause()); } catch (NumberFormatException nfe) { Log.e("Number error", "parse number error - line: " + line + " " + nfe.getMessage(), nfe.getCause()); } catch (Exception ex) { Log.e("Some Exception", "some exception at line :" + line + " \n " + ex.getCause()); ex.printStackTrace(System.err); } return mlist; } public static ArrayList<String> loadStringData(InputStream stream) { ArrayList<String> mlist = new ArrayList<String>(150); int line = 0; try { InputStreamReader is = new InputStreamReader(stream); BufferedReader in = new BufferedReader(is); CSVReader csv = new CSVReader(in, ';', '\"', 0); String data[]; while ((data = csv.readNext()) != null) { line++; mlist.add(data[1]); } in.close(); } catch (IOException ioe) { Log.e("Read CSV Error mypapit", "Some CSV Error: ", ioe.getCause()); } catch (NumberFormatException nfe) { Log.e("Number error", "parse number error - line: " + line + " " + nfe.getMessage(), nfe.getCause()); } catch (Exception ex) { Log.e("Some Exception", "some exception at line :" + line + " \n " + ex.getCause()); ex.printStackTrace(System.err); } // Collections.sort(mlist); return mlist; } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.display_map, menu); if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) { SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView(); searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())); searchView.setIconifiedByDefault(false); searchView.setQueryHint("part of repeater callsign"); SearchView.OnQueryTextListener textChangeListener = new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String searchText) { adapter.getFilter().filter(searchText); Log.d("MYRepeater", "search: " + searchText); adapter.notifyDataSetChanged(); return true; } @Override public boolean onQueryTextChange(String searchText) { // TODO Auto-generated method stub adapter.getFilter().filter(searchText); adapter.notifyDataSetChanged(); return true; } }; searchView.setOnQueryTextListener(textChangeListener); } return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { Intent intent; switch (item.getItemId()) { case R.id.show_map: intent = new Intent(getApplicationContext(), DisplayMap.class); intent.putExtra("LatLong", new LatLng(xlocation.getLatitude(), xlocation.getLongitude())); startActivity(intent); return true; case R.id.manual_settings: if (!this.isLocationEnabled(this)) { intent = new Intent(getApplicationContext(), StaticLocationActivity.class); startActivity(intent); } else { this.showAlertDialog(); } return true; case R.id.action_about: try { showDialog(); } catch (NameNotFoundException ex) { Toast toast = Toast.makeText(this, ex.toString(), Toast.LENGTH_SHORT); toast.show(); } return true; case R.id.action_suggest: intent = new Intent(getApplicationContext(), SuggestRepeaterStartActivity.class); this.startActivity(intent); return true; case R.id.action_contrib: intent = new Intent(); intent.setClassName(getApplicationContext(), "net.mypapit.mobile.myrepeater.ContribActivity"); startActivity(intent); return true; case R.id.action_settings: intent = new Intent(getApplicationContext(), SettingsActivity.class); mrefresh = true; startActivity(intent); return true; case R.id.search: if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.HONEYCOMB) { Toast.makeText(this, "Search is unavailable for Gingerbread (2.3.7) and below", Toast.LENGTH_LONG) .show(); } return true; case R.id.action_simplex: intent = new Intent(getApplicationContext(), SimplexActivity.class); startActivity(intent); return true; } return false; } public void showDialog() throws NameNotFoundException { final Dialog dialog = new Dialog(this); dialog.setContentView(R.layout.about_dialog); dialog.setTitle("About Repeater.MY " + getPackageManager().getPackageInfo(getPackageName(), 0).versionName); dialog.setCancelable(true); // text TextView text = (TextView) dialog.findViewById(R.id.tvAbout); text.setText(R.string.txtLicense); // icon image ImageView img = (ImageView) dialog.findViewById(R.id.ivAbout); img.setImageResource(R.drawable.ic_launcher); dialog.show(); } public void showAlertDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("Manual Location"); builder.setMessage( "Note that this will not allow Repeater.MY to auto-detect location.\n\nDisable Location Service now?"); // Want // to // enable? // if yes - bring user to enable Location Service settings builder.setPositiveButton(R.string.yes, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialogInterface, int i) { Intent intent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); getApplicationContext().startActivity(intent); } }); // if no - bring user to selecting Static Location Activity builder.setNegativeButton(R.string.no, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); builder.create().show(); } public boolean isLocationEnabled(Context context) { LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); String provider = lm.getBestProvider(new Criteria(), true); return (!TextUtils.isEmpty(provider) && !LocationManager.PASSIVE_PROVIDER.equals(provider)); } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Intent intent = new Intent(this.getApplicationContext(), RepeaterDetailsActivity.class); Repeater rpt = (Repeater) adapter.getRepeater(position); String pass[] = rpt.toArrayString(); pass[9] = xlocation.getLatitude() + ""; pass[10] = xlocation.getLongitude() + ""; intent.putExtra("Repeater", pass); intent.putExtra("noCompass", excludeDirection); startActivity(intent); } public void setListAdapter(RepeaterAdapter adapter) { lv.setAdapter(adapter); } public void setAddress(String address) { tvAddress.setText(address); } public void showToast(String message) { Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show(); } protected void onPause() { super.onPause(); overridePendingTransition(R.anim.activity_open_scale, R.anim.activity_close_translate); } // check for compass sensor public boolean checkCompassSensor(Location xlocation) { // if using Simulated provider, then automatically return true if (xlocation.getProvider().equalsIgnoreCase("Simulated")) { return true; } boolean sensor = getApplicationContext().getPackageManager() .hasSystemFeature(PackageManager.FEATURE_SENSOR_COMPASS); return !sensor; } public String generateCallsign() { final SecureRandom random = new SecureRandom(); return new BigInteger(130, random).toString(32).substring(0, 8); } }