Question

我有一个对话框，我想添加一个recyclerView或listView，我知道我必须使用List来控制每行中的项目。现在，当我想要更改复选框或radioButton的值时，List中的所有数据都在变化。我使用了Log，我得到了所有布尔数据同时发生了变化。我将所有项目移动到一个活动但问题仍然存在。似乎arrayList数据之间存在链接。

此外，我更改了代码并使用了SwitchCompat，但是当我想要更改其中一个时，mDataSet中的所有布尔数据都在变化。

    public class AdapterSetOnOffTime extends RecyclerView.Adapter<AdapterSetOnOffTime.ViewHolder> {

    private Context mContext;
    private ArrayList<StructSetOnOffTime> mDataSet;
    private View mView;

    public AdapterSetOnOffTime(Context context, ArrayList<StructSetOnOffTime> dataSet) {
        mContext = context;
        mDataSet = dataSet;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        int id = R.layout.layout_list_settime_items;
        mView = LayoutInflater.from(mContext).inflate(id, parent, false);
        return new ViewHolder(mView);
    }

    @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {
        holder.mSwitch.setChecked(mDataSet.get(position).setOnOffValue);
        holder.mSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
                if(isChecked){
                    mDataSet.get(position).setOnOffValue = true;
                }else{
                    mDataSet.get(position).setOnOffValue = false;
                }
            }
        });
    }

    @Override 
    public int getItemCount() {
        return mDataSet.size();
    }

    static class ViewHolder extends RecyclerView.ViewHolder {

        public TextView mTextTitle;
        public TextView mTextValue;
        public ImageButton mBtn;
        public SwitchCompat mSwitch;

        public ViewHolder(View itemView) {
            super(itemView);
            mTextTitle = (TextView) itemView.findViewById(R.id.txtSetTime);
            mTextValue = (TextView) itemView.findViewById(R.id.txtOnOffStatus);
            mBtn = (ImageButton) itemView.findViewById(R.id.btnSetTime);
            mSwitch = (SwitchCompat) itemView.findViewById(R.id.swPrefSwitch);
        }
    }
}

更新回答

浪费了一天之后，我意识到我在填写ArrayList时犯了一个小错误，我将分享它。

填充适配器的上一个方法：

    StructSetOnOffTime item = new StructSetOnOffTime();
    ArrayList<StructSetOnOffTime> arrayList = new ArrayList<>();
    for(int i = 0; i < 9; i++){
        item.setTimeValue = null;
        item.setOnOffValue = false;
        arrayList.add(item);
    }

正如@Anatoli所说，我在本节中遇到了问题，我通过将上层方法更改为此方法来解决它：

    ArrayList<StructSetOnOffTime> arrayList = new ArrayList<>();
    for(int i = 0; i < 9; i++){
        StructSetOnOffTime item = new StructSetOnOffTime();
        item.setTimeValue = null;
        item.setOnOffValue = false;
        arrayList.add(item);
    }

Answer 1

您设置为radOn和radOff相同OnCheckedChangeListener并检入侦听器是否设置为true。你为什么不做两个听众？

CompoundButton.OnCheckedChangeListener listener = new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            mDataSet.get(position).onOffStatus = true;

            // update adapter
            notifyDataSetChanged();
        }
    }
};
holder.radOn.setOnCheckedChangeListener(listener);

CompoundButton.OnCheckedChangeListener listener = new CompoundButton.OnCheckedChangeListener() {
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            mDataSet.get(position).onOffStatus = false;

            // update adapter
            notifyDataSetChanged();
        }
    }
};
holder.radOff.setOnCheckedChangeListener(listener);

看起来更简单

调用

holder.radOn.setChecked(holder.radOn == buttonView);
holder.radOff.setChecked(holder.radOff == buttonView);

触发侦听器。要更新列表中的值，只需拨打adapter.notifyDataSetChanged();

<强>更新

对于列表中的每个新项目，您必须初始化新的Holder

RecyclerView

@Override
public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
    // Inflate the custom layout
    View itemView = LayoutInflater.from(parent.getContext())
            .inflate(layoutId, parent, false);

    return new Holder(itemView, viewType);
}

ArayList

@NonNull
@Override
public View getView(int position, View convertView, @NonNull ViewGroup parent) {
    Holder viewHolder;

    if (convertView == null) {
        convertView = LayoutInflater.from(getContext()).inflate(resourceId, parent, false);

        viewHolder = new Holder(convertView);

        convertView.setTag(viewHolder);
    } else {
        viewHolder = (Holder) convertView.getTag();
    }

    Item item = getItem(position);

    fill(item, position);

    return convertView;
}

Answer 2

当您设置视图的检查状态时（如果视图没有被破坏，也会从您的代码中设置），您的检查侦听器将被调用，因此您需要手动维护状态。它适用于所有单选按钮，复选框等。

holder.mSwitch.setOnCheckedChangeListener(null);
holder.mSwitch.setChecked(mDataSet.get(position).setOnOffValue);
holder.mSwitch.setOnClickListener(new OnClickListener(){
    //holder.mSwitch.setCheck(!mDataSet.get(position).setOnOffValue);
    mDataSet.get(position).setOnOffValue = !mDataSet.get(position).setOnOffValue;
});

当我使用对话框时，RecycleView和ListView中的所有值都在变化

2 个答案: