add method for updating a single repo while leaving the rest as is

Now, clicking Update in "Repo Detail" only updates that repo, not all of
the repos.  This will also be very useful for more transitory repos, like
p2p repos that are reached via bluetooth, local wifi, etc.

src/org/fdroid/fdroid/UpdateService.java

@@ -20,6 +20,8 @@ package org.fdroid.fdroid;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
 
 import android.app.AlarmManager;
 import android.app.IntentService;
@@ -119,6 +121,10 @@ public class UpdateService extends IntentService implements ProgressListener {
     }
 
     public static UpdateReceiver updateNow(Context context) {
+        return updateRepoNow(null, context);
+    }
+
+    public static UpdateReceiver updateRepoNow(String address, Context context) {
         String title   = context.getString(R.string.process_wait_title);
         String message = context.getString(R.string.process_update_msg);
         ProgressDialog dialog = ProgressDialog.show(context, title, message, true, true);
@@ -129,6 +135,8 @@ public class UpdateService extends IntentService implements ProgressListener {
         UpdateReceiver receiver = new UpdateReceiver(new Handler());
         receiver.setContext(context).setDialog(dialog);
         intent.putExtra("receiver", receiver);
+        if (!TextUtils.isEmpty(address))
+            intent.putExtra("address", address);
         context.startService(intent);
 
         return receiver;
@@ -204,6 +212,7 @@ public class UpdateService extends IntentService implements ProgressListener {
     protected void onHandleIntent(Intent intent) {
 
         receiver = intent.getParcelableExtra("receiver");
+        String address = intent.getStringExtra("address");
 
         long startTime = System.currentTimeMillis();
         String errmsg = "";
@@ -242,7 +251,7 @@ public class UpdateService extends IntentService implements ProgressListener {
             } else {
                 Log.d("FDroid", "Unscheduled (manually requested) update");
             }
-            errmsg = updateRepos();
+            errmsg = updateRepos(address);
             if (TextUtils.isEmpty(errmsg)) {
                 Editor e = prefs.edit();
                 e.putLong(Preferences.PREF_UPD_LAST, System.currentTimeMillis());
@@ -263,7 +272,7 @@ public class UpdateService extends IntentService implements ProgressListener {
         }
     }
 
-    protected String updateRepos() throws Exception {
+    protected String updateRepos(String address) throws Exception {
         SharedPreferences prefs = PreferenceManager
                 .getDefaultSharedPreferences(getBaseContext());
         boolean notify = prefs.getBoolean(Preferences.PREF_UPD_NOTIFY, false);
@@ -283,11 +292,26 @@ public class UpdateService extends IntentService implements ProgressListener {
 
         // Process each repo...
         List<DB.App> updatingApps = new ArrayList<DB.App>();
-        List<Integer> keeprepos = new ArrayList<Integer>();
+        Set<Integer> keeprepos = new TreeSet<Integer>();
         boolean changes = false;
+        boolean update;
         for (DB.Repo repo : repos) {
             if (!repo.inuse)
                 continue;
+            // are we updating all repos, or just one?
+            if (TextUtils.isEmpty(address)) {
+                update = true;
+            } else {
+                // if only updating one repo, mark the rest as keepers
+                if (address.equals(repo.address)) {
+                    update = true;
+                } else {
+                    keeprepos.add(repo.id);
+                    update = false;
+                }
+            }
+            if (!update)
+                continue;
             sendStatus(STATUS_INFO, getString(R.string.status_connecting_to_repo, repo.address));
             RepoUpdater updater = RepoUpdater.createUpdaterFor(getBaseContext(), repo);
             updater.setProgressListener(this);

src/org/fdroid/fdroid/views/fragments/RepoDetailsFragment.java

@@ -211,7 +211,7 @@ public class RepoDetailsFragment extends Fragment {
      */
     private void performUpdate() {
         repo.enable((FDroidApp)getActivity().getApplication());
-        UpdateService.updateNow(getActivity()).setListener(new ProgressListener() {
+        UpdateService.updateRepoNow(repo.address, getActivity()).setListener(new ProgressListener() {
             @Override
             public void onProgress(Event event) {
                 if (event.type == UpdateService.STATUS_COMPLETE_AND_SAME ||