Fix issue #11033002: Percentages in proc stats details are not rounded correctly

Use round instead of ceil.  Also, when showing services from multiple packages,
sort the package categories by the duration of the longest running service in
each, so that the more important ones come first.

Change-Id: I42b47b0522cd786a1c4ee5b59a549ec7c0c6ffe1

src/com/android/settings/applications/ProcessStatsDetail.java

@@ -74,7 +74,7 @@ public class ProcessStatsDetail extends Fragment implements Button.OnClickListen
 
     public static String makePercentString(Resources res, long amount, long total) {
         final double percent = (((double)amount) / total) * 100;
-        return res.getString(R.string.percentage, (int) Math.ceil(percent));
+        return res.getString(R.string.percentage, (int) Math.round(percent));
     }
 
     @Override
@@ -220,17 +220,42 @@ public class ProcessStatsDetail extends Fragment implements Button.OnClickListen
         }
     };
 
+    final static Comparator<ArrayList<ProcStatsEntry.Service>> sServicePkgCompare
+            = new Comparator<ArrayList<ProcStatsEntry.Service>>() {
+        @Override
+        public int compare(ArrayList<ProcStatsEntry.Service> lhs,
+                ArrayList<ProcStatsEntry.Service> rhs) {
+            long topLhs = lhs.size() > 0 ? lhs.get(0).mDuration : 0;
+            long topRhs = rhs.size() > 0 ? rhs.get(0).mDuration : 0;
+            if (topLhs < topRhs) {
+                return 1;
+            } else if (topLhs > topRhs) {
+                return -1;
+            }
+            return 0;
+        }
+    };
+
     private void fillServicesSection() {
         if (mEntry.mServices.size() > 0) {
             boolean addPackageSections = false;
-            if (mEntry.mServices.size() > 1
+            // Sort it all.
-                    || !mEntry.mServices.valueAt(0).get(0).mPackage.equals(mEntry.mPackage)) {
+            ArrayList<ArrayList<ProcStatsEntry.Service>> servicePkgs
-                addPackageSections = true;
+                    = new ArrayList<ArrayList<ProcStatsEntry.Service>>();
-            }
             for (int ip=0; ip<mEntry.mServices.size(); ip++) {
                 ArrayList<ProcStatsEntry.Service> services =
                         (ArrayList<ProcStatsEntry.Service>)mEntry.mServices.valueAt(ip).clone();
                 Collections.sort(services, sServiceCompare);
+                servicePkgs.add(services);
+            }
+            if (mEntry.mServices.size() > 1
+                    || !mEntry.mServices.valueAt(0).get(0).mPackage.equals(mEntry.mPackage)) {
+                addPackageSections = true;
+                // Sort these so that the one(s) with the longest run durations are on top.
+                Collections.sort(servicePkgs, sServicePkgCompare);
+            }
+            for (int ip=0; ip<servicePkgs.size(); ip++) {
+                ArrayList<ProcStatsEntry.Service> services = servicePkgs.get(ip);
                 if (addPackageSections) {
                     addPackageHeaderItem(mServicesParent, services.get(0).mPackage);
                 }