title: android Constructor undefined
body: <p>I am new on android.
  I got this error: The constructor GpsData(btnReport) is undefined
  for this line:</p>
  
  <pre><code>gps = new GpsData(btnReport.this);
  </code></pre>
  
  <p>The Code:</p>
  
  <pre><code>public class btnReport extends AsyncTask&lt;String, String, Void&gt; {
      // GPSTracker class
      GpsData gps;
  
      @Override
      protected Void doInBackground(String... params) {
          String artID = params[0];
  
          // create class object
          gps = new GpsData(btnReport.this);
  
              double latitude = gps.getLatitude();
              double longitude = gps.getLongitude();
              String mlat = String.valueOf(latitude);
              String mlon = String.valueOf(longitude);
  
              // \n is for new line                  
              new PostData().execute(mlat, mlon, artID);
  
          gps.stopUsingGPS();
          return null;
      }
  
  }
  </code></pre>
  
  <p>What can I do?</p>
  
  <p>Here is the GpsData:</p>
  
  <pre><code>public class GpsData extends Service implements LocationListener {
  
      private final Context mContext;
  
      // flag for GPS status
      boolean isGPSEnabled = false;
  
      // flag for network status
      boolean isNetworkEnabled = false;
  
      // flag for GPS status
      boolean canGetLocation = false;
  
      Location location; // location
      double latitude; // latitude
      double longitude; // longitude
  
      // The minimum distance to change Updates in meters
      private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 1000; // 1000 meters
  
      // The minimum time between updates in milliseconds
      private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
  
      // Declaring a Location Manager
      protected LocationManager locationManager;
  
      public GpsData(Context context) {
          this.mContext = context;
          getLocation();
      }
  
      public Location getLocation() {
          try {
              locationManager = (LocationManager) mContext
                      .getSystemService(LOCATION_SERVICE);
  
              // getting GPS status
              isGPSEnabled = locationManager
                      .isProviderEnabled(LocationManager.GPS_PROVIDER);
  
              // getting network status
              isNetworkEnabled = locationManager
                      .isProviderEnabled(LocationManager.NETWORK_PROVIDER);
  
              if (!isGPSEnabled &amp;&amp; !isNetworkEnabled) {
                  // no network provider is enabled
              } else {
                  this.canGetLocation = true;
                  // First get location from Network Provider
                  if (!isNetworkEnabled) { //! hinzugefuegt
                      locationManager.requestLocationUpdates(
                              LocationManager.NETWORK_PROVIDER,
                              MIN_TIME_BW_UPDATES,
                              MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                      Log.d("Network", "Network");
                      if (locationManager != null) {
                          location = locationManager
                                  .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                          if (location != null) {
                              latitude = location.getLatitude();
                              longitude = location.getLongitude();
                          }
                      }
                  }
                  // if GPS Enabled get lat/long using GPS Services
                  if (isGPSEnabled) {
                      if (location == null) {
                          locationManager.requestLocationUpdates(
                                  LocationManager.GPS_PROVIDER,
                                  MIN_TIME_BW_UPDATES,
                                  MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
                          Log.d("GPS Enabled", "GPS Enabled");
                          if (locationManager != null) {
                              location = locationManager
                                      .getLastKnownLocation(LocationManager.GPS_PROVIDER);
                              if (location != null) {
                                  latitude = location.getLatitude();
                                  longitude = location.getLongitude();
                              }
                          }
                      }
                  }
              }
  
          } catch (Exception e) {
              e.printStackTrace();
          }
  
          return location;
      }
  
      /**
       * Stop using GPS listener
       * Calling this function will stop using GPS in your app
       * */
      public void stopUsingGPS(){
          if(locationManager != null){
              locationManager.removeUpdates(GpsData.this);
          }
      }
  
      /**
       * Function to get latitude
       * */
      public double getLatitude(){
          if(location != null){
              latitude = location.getLatitude();
          }
  
          // return latitude
          return latitude;
      }
  
      /**
       * Function to get longitude
       * */
      public double getLongitude(){
          if(location != null){
              longitude = location.getLongitude();
          }
  
          // return longitude
          return longitude;
      }
  
      /**
       * Function to check GPS/wifi enabled
       * @return boolean
       * */
      public boolean canGetLocation() {
          return this.canGetLocation;
      }
  
      /**
       * Function to show settings alert dialog
       * On pressing Settings button will lauch Settings Options
       * */
      public void showSettingsAlert(){
          AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
  
          // Setting Dialog Title
          alertDialog.setTitle("GPS is settings");
  
          // Setting Dialog Message
          alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
  
          // On pressing Settings button
          alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog,int which) {
                  Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                  mContext.startActivity(intent);
              }
          });
  
          // on pressing cancel button
          alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
              public void onClick(DialogInterface dialog, int which) {
              dialog.cancel();
              }
          });
  
          // Showing Alert Message
          alertDialog.show();
      }
  
      @Override
      public void onLocationChanged(Location location) {
      }
  
      @Override
      public void onProviderDisabled(String provider) {
      }
  
      @Override
      public void onProviderEnabled(String provider) {
      }
  
      @Override
      public void onStatusChanged(String provider, int status, Bundle extras) {
      }
  
      @Override
      public IBinder onBind(Intent arg0) {
          return null;
      }
  
  }
  </code></pre>
  
  <p>OK here is the way thru my app:
  StartActivity:</p>
  
  <pre><code>        Intent intent = new Intent(StartActivity.this, ReportActivity.class);
          startActivity(intent);
  </code></pre>
  
  <p>ReportActivity: </p>
  
  <pre><code>public class ReportActivity extends Activity implements OnClickListener {
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.report);
          Button b = (Button) findViewById(R.id.report_TJ_btn1);
          b.setOnClickListener(this);
          b = (Button) findViewById(R.id.report_TJ_btn2);
          b.setOnClickListener(this);
          b = (Button) findViewById(R.id.report_TJ_btn3);
          b.setOnClickListener(this);
      }
      @Override
      public void onClick(View v) {
          if(v.getId()== R.id.report_TJ_btn1) {
              startActivity(new Intent(this,btnReport.class));
          }
          if(v.getId()== R.id.report_TJ_btn2) {
              startActivity(new Intent(this,btnReport.class));
          }
          if(v.getId() == R.id.report_TJ_btn3) {
              startActivity(new Intent(this,btnReport.class));
          }
      }
  
  }
  </code></pre>