How to use

addAdapter

method

in

com.mikepenz.fastadapter.FastAdapter

/**
 * Define a custom Adapter which will be used in the drawer
 * NOTE: this is not recommender
 * WARNING: if you do this after adding items you will loose those!
 *
 * @param adapter the FastAdapter to use with this drawer
 * @return this
 */
public DrawerBuilder withAdapter(@NonNull FastAdapter<IDrawerItem> adapter) {
  this.mAdapter = adapter;
  //we have to rewrap as a different FastAdapter was provided
  adapter.addAdapter(0, mHeaderAdapter);
  adapter.addAdapter(1, mItemAdapter);
  adapter.addAdapter(2, mFooterAdapter);
  adapter.addExtension(mExpandableExtension);
  return this;
}

/**
 * creates a new FastAdapter with the provided adapters
 * if adapters is null, a default ItemAdapter is defined
 *
 * @param adapter the adapters which this FastAdapter should use
 * @return a new FastAdapter
 */
@SuppressWarnings("unchecked")
public static <Item extends IItem, A extends IAdapter> FastAdapter<Item> with(A adapter) {
  FastAdapter<Item> fastAdapter = new FastAdapter<>();
  fastAdapter.addAdapter(0, adapter);
  return fastAdapter;
}

  @Test
  public void testAddPreviouslyFilledAdapterPropagatesPossibleTypesToParentFastAdapter() {
    final TestItem testItem = new TestItem("example name");
    ItemAdapter<TestItem> itemAdapter = new ItemAdapter<>();
    itemAdapter.add(testItem);
    FastAdapter<TestItem> adapter = new FastAdapter<>();
    adapter.addAdapter(0, itemAdapter);
    final ViewGroup dummyParent = new FrameLayout(RuntimeEnvironment.application);
    adapter.onCreateViewHolder(dummyParent, testItem.getType());
  }
}