Remember the last selected navigation filter (status type, label) and preselect it on the next startup. Fixes #113.

core/src/org/transdroid/core/app/settings/ApplicationSettings.java

@@ -30,6 +30,7 @@ import org.json.JSONArray;
 import org.json.JSONException;
 import org.transdroid.core.app.search.SearchHelper;
 import org.transdroid.core.app.search.SearchSite;
+import org.transdroid.core.gui.navigation.NavigationFilter;
 import org.transdroid.core.gui.navigation.StatusType;
 import org.transdroid.core.gui.search.SearchSetting;
 import org.transdroid.core.seedbox.SeedboxProvider;
@@ -284,6 +285,24 @@ public class ApplicationSettings {
 		prefs.edit().putInt("system_lastusedserver", order).commit();
 	}
 
+	/**
+	 * Returns the unique code that (should) uniquely identify a navigation filter, such as a label, in the list of all
+	 * available filters
+	 * @return A code that the last used navigation filter reported as uniquely identifying itself, or null if no last
+	 *         used filter is known
+	 */
+	public String getLastUsedNavigationFilter() {
+		return prefs.getString("system_lastusedfilter", null);
+	}
+
+	/**
+	 * Registers some navigation filter as being the last used by the user
+	 * @param server The navigation filter that the user last used in the interface
+	 */
+	public void setLastUsedNavigationFilter(NavigationFilter filter) {
+		prefs.edit().putString("system_lastusedfilter", filter.getCode()).commit();
+	}
+
 	/**
 	 * Returns all available user-configured web-based (as opped to in-app) search sites
 	 * @return A list of all stored web search site settings objects

core/src/org/transdroid/core/gui/TorrentsActivity.java

@@ -44,18 +44,31 @@ import org.apache.http.client.methods.HttpGet;
 import org.apache.http.impl.client.DefaultHttpClient;
 import org.apache.http.impl.cookie.BasicClientCookie;
 import org.transdroid.core.R;
-import org.transdroid.core.app.search.*;
-import org.transdroid.core.app.settings.*;
+import org.transdroid.core.app.search.SearchHelper_;
+import org.transdroid.core.app.settings.ApplicationSettings;
+import org.transdroid.core.app.settings.ServerSetting;
+import org.transdroid.core.app.settings.SystemSettings;
+import org.transdroid.core.app.settings.SystemSettings_;
+import org.transdroid.core.app.settings.WebsearchSetting;
 import org.transdroid.core.gui.lists.LocalTorrent;
 import org.transdroid.core.gui.lists.NoProgressHeaderTransformer;
 import org.transdroid.core.gui.lists.SimpleListItem;
-import org.transdroid.core.gui.log.*;
-import org.transdroid.core.gui.navigation.*;
-import org.transdroid.core.gui.rss.*;
+import org.transdroid.core.gui.log.Log;
+import org.transdroid.core.gui.log.Log_;
+import org.transdroid.core.gui.navigation.FilterListAdapter;
+import org.transdroid.core.gui.navigation.FilterListAdapter_;
+import org.transdroid.core.gui.navigation.FilterListDropDownAdapter;
+import org.transdroid.core.gui.navigation.FilterListDropDownAdapter_;
+import org.transdroid.core.gui.navigation.Label;
+import org.transdroid.core.gui.navigation.NavigationFilter;
+import org.transdroid.core.gui.navigation.NavigationHelper;
+import org.transdroid.core.gui.navigation.RefreshableActivity;
+import org.transdroid.core.gui.navigation.StatusType;
+import org.transdroid.core.gui.rss.RssfeedsActivity_;
 import org.transdroid.core.gui.search.BarcodeHelper;
 import org.transdroid.core.gui.search.FilePickerHelper;
 import org.transdroid.core.gui.search.UrlEntryDialog;
-import org.transdroid.core.gui.settings.*;
+import org.transdroid.core.gui.settings.MainSettingsActivity_;
 import org.transdroid.core.service.BootReceiver;
 import org.transdroid.core.service.ConnectivityHelper;
 import org.transdroid.core.widget.ListWidgetProvider;
@@ -163,6 +176,8 @@ public class TorrentsActivity extends SherlockFragmentActivity implements OnNavi
 	@InstanceState
 	protected NavigationFilter currentFilter = null;
 	@InstanceState
+	protected String preselectNavigationFilter = null;
+	@InstanceState
 	protected boolean turleModeEnabled = false;
 	@InstanceState
 	protected ArrayList<Label> lastNavigationLabels;
@@ -220,7 +235,8 @@ public class TorrentsActivity extends SherlockFragmentActivity implements OnNavi
 			// Add an empty labels list (which will be updated later, but the adapter needs to be created now)
 			navigationSpinnerAdapter.updateLabels(new ArrayList<Label>());
 		}
-		// Now that all items (or at least their adapters) have been added
+		// Now that all items (or at least their adapters) have been added, ensure a filter is selected
+		// NOTE When this is a fresh start, it might override the filter later (based on the last user selection)
 		if (currentFilter == null) {
 			currentFilter = StatusType.getShowAllType(this);
 		}
@@ -258,6 +274,8 @@ public class TorrentsActivity extends SherlockFragmentActivity implements OnNavi
 		if (firstStart) {
 			// Force first torrents refresh
 			filterSelected(lastUsed, true);
+			// Perhaps we can select the last used navigation filter, but only after a first refresh was completed
+			preselectNavigationFilter = applicationSettings.getLastUsedNavigationFilter();
 			// Handle any start up intents
 			if (openTorrent != null) {
 				openDetails(openTorrent);
@@ -313,7 +331,6 @@ public class TorrentsActivity extends SherlockFragmentActivity implements OnNavi
 		}
 	}
 
-
 	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
 	public void startAutoRefresh() {
 		// Check if already running
@@ -479,6 +496,9 @@ public class TorrentsActivity extends SherlockFragmentActivity implements OnNavi
 	 */
 	protected void filterSelected(SimpleListItem item, boolean forceNewConnection) {
 
+		// No longer apply the last used filter (on a fresh application start), if we still needed to
+		preselectNavigationFilter = null;
+
 		// Server selection
 		if (item instanceof ServerSetting) {
 			ServerSetting server = (ServerSetting) item;
@@ -512,9 +532,12 @@ public class TorrentsActivity extends SherlockFragmentActivity implements OnNavi
 
 		// Status type or label selection - both of which are navigation filters
 		if (item instanceof NavigationFilter) {
+			// Set new filter
 			currentFilter = (NavigationFilter) item;
 			fragmentTorrents.applyNavigationFilter(currentFilter);
 			navigationSpinnerAdapter.updateCurrentFilter(currentFilter);
+			// Remember that the user last selected this
+			applicationSettings.setLastUsedNavigationFilter(currentFilter);
 			// Clear the details view
 			if (fragmentDetails != null) {
 				fragmentDetails.updateIsLoading(false, null);
@@ -1203,6 +1226,25 @@ public class TorrentsActivity extends SherlockFragmentActivity implements OnNavi
 		if (fragmentDetails != null)
 			fragmentDetails.updateLabels(lastNavigationLabels);
 
+		// Perhaps we were still waiting to preselect the last used filter (on a fresh application start)
+		if (preselectNavigationFilter != null) {
+			FilterListAdapter adapter = navigationListAdapter != null ? navigationListAdapter
+					: navigationSpinnerAdapter;
+			for (int i = 0; i < adapter.getCount(); i++) {
+				// Regardless of the navigation style (side list or action bar spinner), we can look up the navigation
+				// filter item, which is represented as simple list item (and might not exist any more, such as with a
+				// label that is deleted on the server)
+				Object item = adapter.getItem(i);
+				if (item instanceof SimpleListItem && item instanceof NavigationFilter
+						&& ((NavigationFilter) item).getCode().equals(preselectNavigationFilter)) {
+					filterSelected((SimpleListItem) item, false);
+					break;
+				}
+			}
+			// Only preselect after the first update we receive (even if the filter wasn't found any more)
+			preselectNavigationFilter = null;
+		}
+
 		// Update the server status (counts and speeds) in the action bar
 		serverStatusView.update(torrents, systemSettings.treatDormantAsInactive());
 

core/src/org/transdroid/core/gui/navigation/Label.java

@@ -56,6 +56,12 @@ public class Label implements SimpleListItem, NavigationFilter, Comparable<Label
 		return this.name;
 	}
 	
+	@Override
+	public String getCode() {
+		// Use the class name and label name to provide a unique navigation filter code
+		return Label.class.getSimpleName() + "_" + name;
+	}
+
 	public int getCount() {
 		return count;
 	}

core/src/org/transdroid/core/gui/navigation/NavigationFilter.java

@@ -42,4 +42,11 @@ public interface NavigationFilter extends Parcelable {
 	 */
 	String getName();
 
+	/**
+	 * Implementations should return a code that (within reasonable expectations) uniquely identifies it in the list of
+	 * navigation filters
+	 * @return The code to uniquely identify this specific navigation filter, such as the name with a class name prefix
+	 */
+	String getCode();
+
 }

core/src/org/transdroid/core/gui/navigation/StatusType.java

@@ -105,6 +105,12 @@ public enum StatusType {
 			return name;
 		}
 
+		@Override
+		public String getCode() {
+			// Uses the class name and status type enum to provide a unique navigation filter code
+			return StatusTypeFilter.class.getSimpleName() + "_" + statusType.name();
+		}
+
 		/**
 		 * Returns true if the torrent status matches this (selected) status type, false otherwise
 		 * @param torrent The torrent to match against this status type