Recyclerview配合activity全选按钮，数据不错乱

package com.zs.zs; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.CheckBox; import java.util.ArrayList; /** * @Author: duke * @DateTime: 2017-06-28 22:34 * @Description: */ public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> { private ArrayList<DataBean> list = new ArrayList<>(); private OnAllChangeListener listener; public MyAdapter(ArrayList<DataBean> list) { this.list = list; } public void setOnAllChangeListener(OnAllChangeListener listener) { this.listener = listener; } public void update(ArrayList<DataBean> list) { this.list = list; notifyDataSetChanged(); } @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false); return new ViewHolder(view); } @Override public void onBindViewHolder(final ViewHolder holder, final int position) { final DataBean dataBean = this.list.get(position); holder.checkBox.setChecked(dataBean.isChecked); holder.checkBox.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dataBean.isChecked = holder.checkBox.isChecked(); checkAllStatus(); } }); } private void checkAllStatus() { if (this.list == null || this.listener == null) { return; } boolean status = true; for (int i = 0; i < this.list.size(); i++) { if (!this.list.get(i).isChecked) { status = false; break; } } this.listener.onAllSelectOrNot(status); } @Override public int getItemCount() { if (this.list == null) { return 0; } return this.list.size(); } static class ViewHolder extends RecyclerView.ViewHolder { private CheckBox checkBox; public ViewHolder(View itemView) { super(itemView); checkBox = (CheckBox) itemView.findViewById(R.id.item_checkbox); } } public interface OnAllChangeListener { void onAllSelectOrNot(boolean selectOrNot); } }