Code refactoring

Change-Id: I053ab0c691295b81dc7aa0fd858fd609a69ade81

src/com/android/settings/indexer/Index.java

@@ -160,20 +160,19 @@ public class Index {
         return sb.toString();
     }
 
-    public void addIndexableData(IndexableData data) {
-        mDataToIndex.add(data);
-    }
-
     public void addIndexableData(IndexableData[] array) {
+        synchronized (mDataToIndex) {
             final int count = array.length;
             for (int n = 0; n < count; n++) {
-            addIndexableData(array[n]);
+                mDataToIndex.add(array[n]);
+            }
         }
     }
 
     public boolean update() {
+        synchronized (mDataToIndex) {
             final IndexTask task = new IndexTask();
-        task.execute();
+            task.execute(mDataToIndex);
             try {
                 return task.get();
             } catch (InterruptedException e) {
@@ -184,6 +183,7 @@ public class Index {
                 return false;
             }
         }
+    }
 
     private SQLiteDatabase getReadableDatabase() {
         return IndexDatabaseHelper.getInstance(mContext).getReadableDatabase();
@@ -196,7 +196,7 @@ public class Index {
     /**
      * A private class for updating the Index database
      */
-    private class IndexTask extends AsyncTask<Void, Integer, Boolean> {
+    private class IndexTask extends AsyncTask<List<IndexableData>, Integer, Boolean> {
 
         @Override
         protected void onPreExecute() {
@@ -211,9 +211,13 @@ public class Index {
         }
 
         @Override
-        protected Boolean doInBackground(Void... params) {
+        protected Boolean doInBackground(List<IndexableData>... params) {
-            final SQLiteDatabase database = getWritableDatabase();
             boolean result = false;
+            final List<IndexableData> dataToIndex = params[0];
+            if (null == dataToIndex || dataToIndex.size() == 0) {
+                return result;
+            }
+            final SQLiteDatabase database = getWritableDatabase();
             final Locale locale = Locale.getDefault();
             final String localeStr = locale.toString();
             if (isLocaleAlreadyIndexed(database, locale)) {