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POWhich Class Should I call locationManger.removeUpdates() from?
 

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  1. POWhich Class Should I call locationManger.removeUpdates() from?
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    <p>So, I have an Android application that is asking for the GPS from the <code>LocationManager</code> class. I have an <code>Activity</code> that wants to use that data, and a custom class that implements <code>LocationListener</code>. I have written some custom methods to return the GPS values to my other class. </p> <p>Currently, I am asking for and releasing the location updates from my <code>Activity</code> class, not my implementation of the <code>LocationListener</code> class... I think this is the right way to go about it, but I just wanted to get any feedback on the life cycle, etc. (the class that implements <code>LocationListener</code> is not an <code>Activity</code>, so I don't think I even could call <code>onPause()</code> etc, ?)</p> <p>This is the <code>Activity</code>:</p> <pre><code>package com.jessescott.sonicity; import android.app.Activity; import android.content.Context; import android.view.View; import android.widget.TextView; import android.location.Location; import android.location.LocationManager; import android.location.LocationListener; public class PlayActivity extends Activity { // GLOBALS private static final String TAG = "SoniCity"; LocationManager locationManager; MyLocationListener locationListener; TextView latitude, longitude; TextView ActualLatitude, ActualLongitude; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.play_layout); // GPS locationListener = new MyLocationListener(this); // TextViews latitude = (TextView) findViewById(R.id.Latitude); longitude = (TextView) findViewById(R.id.Longitude); ActualLatitude = (TextView) findViewById(R.id.ActualLat); ActualLatitude.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Log.v(TAG, "Asking For New Latitude"); ActualLatitude.setText(locationListener.getCurrentLatitude()); } }); ActualLongitude = (TextView) findViewById(R.id.ActualLon); ActualLongitude.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Log.v(TAG, "Asking For New Latitude"); ActualLongitude.setText(locationListener.getCurrentLongitude()); } }); } @Override protected void onPause() { super.onPause(); // Stop GPS locationManager.removeUpdates(locationListener); locationManager = null; } @Override protected void onResume() { super.onResume(); locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 5, locationListener); } @Override public void onDestroy() { super.onDestroy(); } } /* */ </code></pre> <p>... and this is the <code>LocationListener</code> implementation :</p> <pre><code> package com.jessescott.sonicity; import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.os.Bundle; import android.util.Log; class MyLocationListener implements LocationListener { private static final String TAG = "SoniCity"; float currentLatitude = 0; float currentLongitude = 0; public MyLocationListener(Context context) { super(); } // Define all LocationListener methods public void onLocationChanged(Location location) { currentLatitude = (float)location.getLatitude(); currentLongitude = (float)location.getLongitude(); } public void onProviderDisabled (String provider) { Log.v(TAG, "Provider is " + provider); } public void onProviderEnabled (String provider) { Log.v(TAG, "Provider is " + provider); } public void onStatusChanged (String provider, int status, Bundle extras) { Log.v(TAG, "Status is " + status); } // Custom Methods public String getCurrentLatitude() { String lat = Float.toString(currentLatitude); return lat; } public String getCurrentLongitude() { String lon = Float.toString(currentLongitude); return lon; } } /* */ </code></pre> <p>I guess since I've moved it to a separate class (they used to be the same one), I just want to make sure I'm calling th request/remove in the right place.</p>
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