altosdroid: Rate limit map loading pacifier

[fw/altos] / altosdroid / src / org / altusmetrum / AltosDroid / PreloadMapActivity.java

diff --git a/altosdroid/src/org/altusmetrum/AltosDroid/PreloadMapActivity.java b/altosdroid/src/org/altusmetrum/AltosDroid/PreloadMapActivity.java
index 0bf3aa109ee3e1d2b0e0cf17bed6c1671c034bb4..11d712806570ad4b7e0a74dc0f13f701735469f8 100644 (file)
--- a/altosdroid/src/org/altusmetrum/AltosDroid/PreloadMapActivity.java
+++ b/altosdroid/src/org/altusmetrum/AltosDroid/PreloadMapActivity.java
@@ -69,8 +69,14 @@ public class PreloadMapActivity extends Activity implements AltosLaunchSiteListe
 
        private ProgressBar     progress;
 
+       private AltosMapLoader  loader;
+
+       long    loader_notify_time;
+
        /* AltosMapLoaderListener interfaces */
        public void loader_start(final int max) {
+               loader_notify_time = System.currentTimeMillis();
+
                this.runOnUiThread(new Runnable() {
                                public void run() {
                                        progress.setMax(max);
@@ -80,6 +86,13 @@ public class PreloadMapActivity extends Activity implements AltosLaunchSiteListe
        }
 
        public void loader_notify(final int cur, final int max, final String name) {
+               long    now = System.currentTimeMillis();
+
+               if (now - loader_notify_time < 100)
+                       return;
+
+               loader_notify_time = now;
+
                this.runOnUiThread(new Runnable() {
                                public void run() {
                                        progress.setProgress(cur);
@@ -88,6 +101,7 @@ public class PreloadMapActivity extends Activity implements AltosLaunchSiteListe
        }
 
        public void loader_done(int max) {
+               loader = null;
                this.runOnUiThread(new Runnable() {
                                public void run() {
                                        progress.setProgress(0);
@@ -254,6 +268,9 @@ public class PreloadMapActivity extends Activity implements AltosLaunchSiteListe
        }
 
        private void load() {
+               if (loader != null)
+                       return;
+
                try {
                        double  lat = latitude();
                        double  lon = longitude();
@@ -264,7 +281,7 @@ public class PreloadMapActivity extends Activity implements AltosLaunchSiteListe
 
                        AltosDebug.debug("PreloadMap load %f %f %d %d %f %d\n",
                                         lat, lon, min, max, r, t);
-                       new AltosMapLoader(map, this, lat, lon, min, max, r, t);
+                       loader = new AltosMapLoader(map, this, lat, lon, min, max, r, t);
                } catch (ParseException e) {
                        AltosDebug.debug("PreloadMap load raised exception %s", e.toString());
                }
@@ -409,6 +426,9 @@ public class PreloadMapActivity extends Activity implements AltosLaunchSiteListe
        protected void onDestroy() {
                super.onDestroy();
 
+               if (loader != null)
+                       loader.abort();
+
                // Stop listening for location updates
                ((LocationManager) getSystemService(Context.LOCATION_SERVICE)).removeUpdates(this);
        }