serial query runnable

ClicksContentProvider.java

public static void query(QueryListener cursorListener, Context context,
                             Uri uri, String[] cols, String[] selectionArgs,
                             String selection, String sortOrder) {

        new Thread(new QueryRunnable(cursorListener, context,
                uri, cols, selectionArgs,
                selection, sortOrder)).start();
    }

    private static class QueryRunnable implements Runnable {

        private QueryListener mListener;
        private Uri mUri;
        private String[] mCols;
        private String[] mSelectionArgs;
        private String mSelection;
        private String mSortOrder;
        private Context mContext;

        public QueryRunnable(QueryListener cursorListener, Context context,
                             Uri uri, String[] cols, String[] selectionArgs,
                             String selection, String sortOrder) {
            mListener = cursorListener;
            mContext = context;
            mSelectionArgs = selectionArgs;
            mCols = cols;
            mSelection = selection;
            mSortOrder = sortOrder;
            mUri = uri;
        }

        @Override
        public void run() {

            synchronized (lock) {
                if (mContext == null) {
                    return;
                }

                Cursor cursor = mContext.getContentResolver().query(mUri, mCols, mSelection,
                        mSelectionArgs, mSortOrder);

                mListener.onComplete(cursor);
            }

        }
    }