android/sdk/src/main/java/com/taobao/weex/ui/view/listview/adapter/RecyclerViewBaseAdapter.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.taobao.weex.ui.view.listview.adapter;

import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.ViewGroup;


/**
 * Adapter for recyclerView
 */
public class RecyclerViewBaseAdapter<T extends ListBaseViewHolder> extends RecyclerView.Adapter<T> {

  private IRecyclerAdapterListener iRecyclerAdapterListener;

  public RecyclerViewBaseAdapter(IRecyclerAdapterListener Listener) {
    this.iRecyclerAdapterListener = Listener;
  }

  @Override
  public T onCreateViewHolder(ViewGroup parent, int viewType) {
    if (iRecyclerAdapterListener != null) {
      return (T) iRecyclerAdapterListener.onCreateViewHolder(parent, viewType);
    }

    return null;
  }

  @Override
  public void onViewAttachedToWindow(T holder) {
    super.onViewAttachedToWindow(holder);
    if( holder !=null && holder.isFullSpan()){
      ViewGroup.LayoutParams lp = holder.itemView.getLayoutParams();
      if(lp != null
              && lp instanceof StaggeredGridLayoutManager.LayoutParams
              ) {
        StaggeredGridLayoutManager.LayoutParams p = (StaggeredGridLayoutManager.LayoutParams) lp;
        p.setFullSpan(true);
      }
    }
  }

  @Override
  public void onViewDetachedFromWindow(T holder) {
    super.onViewDetachedFromWindow(holder);
    if (holder != null)
      holder.setComponentUsing(false);
  }

  @Override
  public void onBindViewHolder(T viewHolder, int i) {
    if (iRecyclerAdapterListener != null) {
      iRecyclerAdapterListener.onBindViewHolder(viewHolder, i);
    }
  }

  @Override
  public int getItemViewType(int position) {
    if (iRecyclerAdapterListener != null) {
      return iRecyclerAdapterListener.getItemViewType(position);
    }
    return position;
  }

  @Override
  public long getItemId(int position) {
    return iRecyclerAdapterListener.getItemId(position);
  }

  @Override
  public int getItemCount() {
    if (iRecyclerAdapterListener != null) {
      return iRecyclerAdapterListener.getItemCount();
    }
    return 0;
  }

  @Override
  public void onViewRecycled(T holder) {
    if (iRecyclerAdapterListener != null) {
      iRecyclerAdapterListener.onViewRecycled(holder);
    }
    super.onViewRecycled(holder);
  }

  @Override
  public boolean onFailedToRecycleView(T holder) {
    if (iRecyclerAdapterListener != null) {
      return iRecyclerAdapterListener.onFailedToRecycleView(holder);
    }
    return super.onFailedToRecycleView(holder);
  }
}