some time,we need the ViewHolder to be a innerClass of a Adapter ,incase to share the variable of it。 so here is the code we modified to support this feature。it both support single ViewHolder class or as innerClass in Adapter。

AdapterHelper.class

<T extends EfficientViewHolder> EfficientViewHolder generateViewHolder(View v,
                                                                       Class<T> viewHolderClass, EfficientRecyclerAdapter adapter) {
    Constructor<?>[] constructors = viewHolderClass.getDeclaredConstructors();

    if (constructors == null)
        return null;

    for (Constructor<?> constructor : constructors) {
        Class<?>[] parameterTypes = constructor.getParameterTypes();
        if (parameterTypes == null)
            continue;

        try {
            if (parameterTypes.length == 1 && parameterTypes[0].isAssignableFrom(View.class)) {
                Object viewHolder = constructor.newInstance(v);
                return (EfficientViewHolder) viewHolder;
            }

            if (parameterTypes.length == 2 && parameterTypes[1].isAssignableFrom(View.class)) {
                Object viewHolder = constructor.newInstance(adapter, v);
                return (EfficientViewHolder) viewHolder;
            }
        } catch (Exception e) {
            Log.e("ViewHolder init error", e.getMessage());
            throw new RuntimeException(
                    "Impossible to instantiate "
                            + viewHolderClass.getSimpleName(), e);
        }
    }

    return null;
}

EfficientRecyclerAdapter.class

@Override
public EfficientViewHolder generateViewHolder(View v, int viewType) {
    Class<? extends EfficientViewHolder> viewHolderClass = getViewHolderClass(viewType);
    if (viewHolderClass == null) {
        mBaseAdapter.throwMissingViewHolder(viewType);
        return null;
    }
    return mBaseAdapter.generateViewHolder(v, viewHolderClass, this);
}

how about reduce more code?

in EfficientViewHolder Class，add the code below

public void setText(int viewId, String text) {
    TextView tv = findViewByIdEfficient(viewId);
    tv.setText(text);
}

public void setTextColor(int viewId, int textColor) {
    TextView view = findViewByIdEfficient(viewId);
    view.setTextColor(textColor);
}


public void setImageResource(int viewId, int resId) {
    ImageView view = findViewByIdEfficient(viewId);
    view.setImageResource(resId);
}

public void setVisible(int viewId, boolean visible) {
    View view = findViewByIdEfficient(viewId);
    view.setVisibility(visible ? View.VISIBLE : View.GONE);
}

public void setTag(int viewId, Object tag) {
    View view = findViewByIdEfficient(viewId);
    view.setTag(tag);
}

public void setTag(int viewId, int key, Object tag) {
    View view = findViewByIdEfficient(viewId);
    view.setTag(key, tag);
}

public void setOnClickListener(int viewId, View.OnClickListener listener) {
    View view = findViewByIdEfficient(viewId);
    view.setOnClickListener(listener);
}

the result:

before:

                ((TextView)findViewByIdEfficient(R.id.textView_teacher_syncHomeWork_content)).setText(object.getQueContent());
        ((TextView) findViewByIdEfficient(R.id.textView_teacher_syncHomeWork_answerTime))
                .setText("平均答题时间：" + DatetimeUtils.formatDateForClock(Convert.toInt(object.getAnswerAvgTime())));

        findViewByIdEfficient(R.id.relativeLayout_teacher_syncHomeWork_container).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                ToastUtil.shortShow(context, "点击了：" + object.getQueId());
            }
        });

after:

        setText(R.id.textView_teacher_syncHomeWork_content, object.getQueContent());
        setText(R.id.textView_teacher_syncHomeWork_answerTime, "平均答题时间：" + DatetimeUtils.formatDateForClock(Convert.toInt(object.getAnswerAvgTime())));

        setOnClickListener(R.id.relativeLayout_teacher_syncHomeWork_container, new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ToastUtil.shortShow(context, "点击了：" + object.getQueId());
            }
        });

thanks to your nice project

I seems that the LongClick method of the simpleAdapter is not working as it is supposed to, the simple click listener is working fine. And is there any way to add onItemTouchListener as well on the Adapter.

Thanks in advance

Is it possible that this adapter "breaks" the RecyclerView.LayoutManager.getPosition(View view) ? It is always returning -1. Maybe I'm not doing it correctly but I think I am.

How to send custom objects to holder e.g reference to my Fragment object so that i can call public methods from within the Holder, any way to achieve that ? Sorry for the inconvenience :(

Hi, Thanks for your library. But when i clicked the recycleview's item, i found the item listener was called twice. So I read the library code, i found you set TWO times call back in the ViewHolderClickListener .

Would be possible to add setNotifyOnChange(bool)?

I use a SwipeRefreshLayout so i need to clear the current adapter and add all the items back and when i use adapter.clear() and then addAll() a small flickering happends.

add custom headView、footView

public class HeadFootRecyclerAdapter<T> extends EfficientRecyclerAdapter<T> {
    private static final int HEAD_VIEW_TYPE = 3300;
    private static final int FOOT_VIEW_TYPE = HEAD_VIEW_TYPE + 1;

    private View mHeadView;
    private View mFootView;

    public HeadFootRecyclerAdapter(List<T> objects) {
        super(objects);
    }

    public HeadFootRecyclerAdapter(int layoutResId, Class<? extends EfficientViewHolder<? extends T>> viewHolderClass, List<T> objects) {
        super(layoutResId, viewHolderClass, objects);
    }

    public void setHeadView(View headView) {
        mHeadView = headView;
        notifyDataSetChanged();
    }

    public void setFootView(View footView) {
        mFootView = footView;
        notifyDataSetChanged();
    }

    public boolean hasHeadView() {
        return mHeadView != null;
    }

    public boolean hasFootView() {
        return mFootView != null;
    }

    public void removeHeadView() {
        if (!hasHeadView()) return;

        mHeadView = null;
        notifyDataSetChanged();
    }

    public void removeFootView() {
        if (!hasFootView()) return;

        mFootView = null;
        notifyDataSetChanged();
    }

    @Override
    public int getItemCount() {
        int count = super.getItemCount();

        if (mHeadView != null)
            count++;

        if (mFootView != null)
            count++;

        return count;
    }

    public int getRealCount() {
        return super.getItemCount();
    }

    public int getRealPosition(int position) {
        if (mHeadView != null) {
            position--;
        }

        return position;
    }

    @Override
    public int getItemViewType(int position) {
        if (mHeadView != null && position == 0) {
            return HEAD_VIEW_TYPE;
        }

        if (mFootView != null && position == getItemCount() - 1) {
            return FOOT_VIEW_TYPE;
        }

        return super.getItemViewType(position);
    }

    @Override
    public EfficientViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (viewType == HEAD_VIEW_TYPE && mHeadView != null) {
            return new EfficientViewHolder(mHeadView) {
                @Override
                protected void updateView(Context context, Object object) {

                }
            };
        }

        if (viewType == FOOT_VIEW_TYPE && mFootView != null) {
            return new EfficientViewHolder(mFootView) {
                @Override
                protected void updateView(Context context, Object object) {

                }
            };
        }

        return super.onCreateViewHolder(parent, viewType);
    }

    @Override
    public void onBindViewHolder(EfficientViewHolder viewHolder, int position) {
        int viewType = getItemViewType(position);

        if (viewType == HEAD_VIEW_TYPE || viewType == FOOT_VIEW_TYPE) return;


        position = getRealPosition(position);
        super.onBindViewHolder(viewHolder, position);
    }
}