为RecyclerView添加优雅的点击事件、长按事件

一、完整的点击、长按事件支持类

resources

<?xml version="1.0" encoding="utf-8"?>
<resources>
<item name="item_click_support" type="id" />
</resources>

// 2. 具体的支持类
public class ItemClickSupport {
private final RecyclerView mRecyclerView;
private OnItemClickListener mOnItemClickListener;
private OnItemLongClickListener mOnItemLongClickListener;
private View.OnClickListener mOnClickListener = new View.OnClickListener() {
@Override public void onClick(View v) {
if (mOnItemClickListener != null) {
RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
}
}
};
private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() {
@Override public boolean onLongClick(View v) {
if (mOnItemLongClickListener != null) {
RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v);
}
return false;
}
};
private RecyclerView.OnChildAttachStateChangeListener mAttachListener = new RecyclerView.OnChildAttachStateChangeListener() {
@Override public void onChildViewAttachedToWindow(View view) {
if (mOnItemClickListener != null) {
view.setOnClickListener(mOnClickListener);
}
if (mOnItemLongClickListener != null) {
view.setOnLongClickListener(mOnLongClickListener);
}
}

@Override public void onChildViewDetachedFromWindow(View view) {

}
};

private ItemClickSupport(RecyclerView recyclerView) {
mRecyclerView = recyclerView;
mRecyclerView.setTag(R.id.item_click_support, this);
mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
}

public static ItemClickSupport addTo(RecyclerView view) {
ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
if (support == null) {
support = new ItemClickSupport(view);
}
return support;
}

public static ItemClickSupport removeFrom(RecyclerView view) {
ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
if (support != null) {
support.detach(view);
}
return support;
}

public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) {
mOnItemClickListener = listener;
return this;
}

public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) {
mOnItemLongClickListener = listener;
return this;
}

private void detach(RecyclerView view) {
view.removeOnChildAttachStateChangeListener(mAttachListener);
view.setTag(R.id.item_click_support, null);
}

// 点击接口
public interface OnItemClickListener {
void onItemClicked(RecyclerView recyclerView, int position, View v);
}

// 长按接口
public interface OnItemLongClickListener {
boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
}
}

二、使用方式

setAdapter()

// 点击
ItemClickSupport.addTo(rv).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
@Override public void onItemClicked(RecyclerView recyclerView, int position, View v) {
Toast.makeText(MainActivity.this, mDatas.get(position), Toast.LENGTH_SHORT).show();
}
});

// 长按
ItemClickSupport.addTo(rv).setOnItemLongClickListener(new ItemClickSupport.OnItemLongClickListener() {
@Override public boolean onItemLongClicked(RecyclerView recyclerView, int position, View v) {

Toast.makeText(MainActivity.this, "长按" + mDatas.get(position) + "已删除", Toast.LENGTH_SHORT).show();

// 需要自己处理position在集合中的位置(需考虑头、身、脚布局数量)
mDatas.remove(position);
if (lastVisible + 1 == mAdapter.getItemCount()) {
addmore();
}
mAdapter.notifyItemRemoved(position);

// 消耗事件
return true;
}
});