RecyclerView解决CheckBox复用问题

RecyclerView解决CheckBox复用问题 在onBindViewHolde中操作

    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {        final ViewHolder holde = (ViewHolder) holder;        final Child item = list.get(position);        onBind = true;        //先判断仓库里有没有position对应的监听器        if (getCBL(position) == null) {            setCBL(position, new CBcheckedListener(position));        }        //要先起一个新的状态监听        holde.selectItemCb.setOnCheckedChangeListener(new CBcheckedListener(position));        //然后读取状态，顺序不能弄反，一旦反了就相当于setChecked用了上一次position的监听，把上一次保存的结果覆盖了        holde.selectItemCb.setChecked(getState(position));        onBind = false;        String letter = (item.headpinyin.charAt(0) + "");        //分类栏的显示和隐藏        if (position > 0) {            //获取上一个条目的首字母            String previousLetter = (list.get(position - 1).headpinyin.charAt(0) + "");            //如果当前letter和上一个的一样，那么则隐藏当前的字母View            if (letter.equals(previousLetter)) {                holde.letterTv.setVisibility(View.GONE);            } else {                holde.letterTv.setVisibility(View.VISIBLE);                holde.letterTv.setText(letter);            }        } else {            //说明是第0个，直接显示            holde.letterTv.setVisibility(View.VISIBLE);            holde.letterTv.setText(letter);        }        if (AppUtil.isNetworkAvailable(mActivity)) {            if (item.getRosterPhoto() != null && item.getRosterPhoto().length() > 0) {                holde.iconCircle.setVisibility(View.VISIBLE);                holde.iconIv.setVisibility(View.GONE);                Glide.with(mActivity).load(item.getRosterPhoto()).diskCacheStrategy(DiskCacheStrategy.ALL).dontAnimate().centerCrop().into(holde.iconCircle);            } else {                holde.iconCircle.setVisibility(View.GONE);                holde.iconIv.setVisibility(View.VISIBLE);                String name = item.getName();                if (name != null) {                    int length = name.length();                    if (length > 2) {                        holde.iconIv.setText(name.substring(length - 2, length));                    } else {                        holde.iconIv.setText(name);                    }                }            }        } else {            holde.iconCircle.setVisibility(View.GONE);            holde.iconIv.setVisibility(View.VISIBLE);            String name = item.getName();            if (name != null) {                int length = name.length();                if (length > 2) {                    holde.iconIv.setText(name.substring(length - 2, length));                } else {                    holde.iconIv.setText(name);                }            }        }        holde.addressRv.setBackgroundColor(Color.WHITE);        holde.friend_name.setVisibility(View.VISIBLE);        holde.friend_name.setText(item.getName());        holde.callIv.setVisibility(View.GONE);        holde.mailIv.setVisibility(View.GONE);        holde.messageTv.setVisibility(View.GONE);        holde.nameTv.setVisibility(View.GONE);    }    //注意这里便是储存状态的仓库    HashMap<Integer, Boolean> CBstate = new HashMap<>();    //存储状态    public void setState(int pos, Boolean state) {        CBstate.put(pos, state);    }    //读取状态    public Boolean getState(int pos) {        Boolean s = CBstate.get(pos);        return s == null ? false : s;    }    //保存监听器的仓库    HashMap<Integer, CBcheckedListener> CBLStore = new HashMap<>();    //存储    public void setCBL(int pos, CBcheckedListener cbl) {        CBLStore.put(pos, cbl);    }    public CBcheckedListener getCBL(int pos) {        return CBLStore.get(pos);    }    //这里自定义一个勾选监听的实现类，方便传递position    class CBcheckedListener implements CompoundButton.OnCheckedChangeListener {        int pos = 0;        public CBcheckedListener(int pos) {            this.pos = pos;        }        @Override        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {            //当用户点选时触发此事件进行存储状态，下次再滚到这个position的item时会在执行上面的代码读出状态正确展示给用户            if (!onBind) {                setState(pos, isChecked);                notifyDataSetChanged();                select.clear();                for (Map.Entry<Integer, Boolean> entries : CBstate.entrySet()) {                    if (entries.getValue()) {                        select.add(list.get(entries.getKey()));                    }                }                if (select != null && select.size() == 0) {                    selectPeopleTv.setText("已选择:");                    selectFl.setEnabled(false);                    selectDefineTv.setEnabled(false);                } else if (select != null && select.size() > 0) {                    selectPeopleTv.setText("已选择:" + select.size() + "人");                    selectFl.setEnabled(true);                    selectDefineTv.setEnabled(true);                    selectFl.setOnClickListener(new View.OnClickListener() {                        @Override                        public void onClick(View v) {                            if (messageInfo != null) {                                showPop();                                for (int i = 0; i < select.size(); i++) {                                    sendMessage(select.get(i), i, select.size() - 1);                                }                                finish();                            }                        }                    });                }            }        }    }

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条目点击选择CheckBox

class RootClickListener implements View.OnClickListener {        int pos = 0;        public RootClickListener(int pos) {            this.pos = pos;        }        @Override        public void onClick(View v) {            //当用户点选时触发此事件进行存储状态，下次再滚到这个position的item时会在执行上面的代码读出状态正确展示给用户            if (!onBind) {                Boolean state = getState(pos);                holde.selectItemCb.setChecked(!state);                setState(pos, !state);                notifyDataSetChanged();                select.clear();                for (Map.Entry<Integer, Boolean> entries : CBstate.entrySet()) {                    if (entries.getValue()) {                        select.add(list.get(entries.getKey()));                    }                }                if (select != null && select.size() == 0) {                    selectPeopleTv.setText("已选择:");                    selectFl.setEnabled(false);                    selectDefineTv.setEnabled(false);                } else if (select != null && select.size() > 0) {                    selectPeopleTv.setText("已选择:" + select.size() + "人");                    selectFl.setEnabled(true);                    selectDefineTv.setEnabled(true);                    selectFl.setOnClickListener(new View.OnClickListener() {                        @Override                        public void onClick(View v) {                            if (messageInfo != null) {                                showPop();                                for (int i = 0; i < select.size(); i++) {                                    sendMessage(select.get(i), i, select.size() - 1);                                }                                finish();                            }                        }                    });                }            }        }    }

解决Android RecyclerView : notifyDataSetChanged() IllegalStateException

private boolean onBind;public ViewHolder(View itemView) {    super(itemView);    mCheckBox = (CheckBox) itemView.findViewById(R.id.checkboxId);    mCheckBox.setOnCheckChangeListener(this);}@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {    if(!onBind) {        // your process when checkBox changed        // ...        notifyDataSetChanged();    }}...@Overridepublic void onBindViewHolder(YourAdapter.ViewHolder viewHolder, int position) {    // process other views     // ...    onBind = true;    viewHolder.mCheckBox.setChecked(trueOrFalse);    onBind = false;}