private void initDataset() {
        mDataset = new String[DATASET_COUNT];
        for (int i = 0; i < DATASET_COUNT; i++) {
            mDataset[i] = "This is element #" + i;
        }
    }
Generates Strings for RecyclerView's adapter. This data would usually come
from a local content provider or remote server.
RecyclerView/Application/src/main/java/com/example/android/recyclerview/RecyclerViewFragment.java