java - 如何将 onBindViewHolder 内部的项目存储到数组

Question

我在recycview中有很多按钮我只是想将它们添加到数组中，然后让它们添加一些工作。

• 首先我定义了数组名称“buttons”ToggleButton 按钮[] = new ToggleButton[5];

• 然后我将值放入其中按钮[位置]=holder.playBtn;

• 现在我想按其中一个更改所有按钮的所有背景所以我使用了这个函数:关闭所有()，但我没有成功

// My class
public class MyListAdapter extends RecyclerView.Adapter<MyListAdapter.ViewHolder> {

    public RecyclerViewClickListener mListener;
    private MyListData[] listdata;
    private Context context;
    private ToggleButton [] listBtnPlyStop = null;

    ToggleButton buttons[] = new ToggleButton[5];

    public MyListAdapter(Context context ,MyListData[] listdata , RecyclerViewClickListener mListener) {
        this.mListener =mListener;
        this.listdata = listdata;
        this.context = context;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
        View listItem= layoutInflater.inflate(R.layout.row_list_azcar, parent, false);
        ViewHolder viewHolder = new ViewHolder(listItem);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        final MyListData myListData = listdata[position];
        holder.textView.setText(listdata[position].getDescription());
        buttons[position]=holder.playBtn;
        holder.playBtn.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
                mListener.onClick(compoundButton,position);
                setBgBtn(compoundButton,checked,position);
            }
        });
    }

    private void setBgBtn(CompoundButton compoundButton , boolean checked,int id) {
        if(checked){
            compoundButton.setBackground(ContextCompat.getDrawable(context, R.drawable.btnpause));
        }else{
            compoundButton.setBackground(ContextCompat.getDrawable(context, R.drawable.btnplay));
        }
        closeAll();
    }

    private void closeAll(){
        for(int j=0; j<buttons.length-1;j++) {
            buttons[j].setBackgroundResource(R.drawable.btnpause);
        }
    }

    @Override
    public int getItemCount() {
        return listdata.length;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        public ImageView imageView;
        public TextView textView;
        public LinearLayout linearLayout;
        public ToggleButton toggleButton,playBtn;
        public RadioButton radioButton1,radioButton2,radioButton3;
        private RecyclerViewClickListener mListener;

        public ViewHolder(View itemView){
            super(itemView);
            //this.itemView = itemView;
            this.toggleButton =(ToggleButton) itemView.findViewById(R.id.bt_check2);
            this.playBtn =(ToggleButton) itemView.findViewById(R.id.bt_play);
            this.radioButton1 = (RadioButton)itemView.findViewById(R.id.radio_btn1);
            this.radioButton2= (RadioButton)itemView.findViewById(R.id.radio_btn2);
            this.radioButton3= (RadioButton)itemView.findViewById(R.id.radio_btn3);
            this.textView = (TextView) itemView.findViewById(R.id._txt_kind_of_azkar);
            linearLayout = (LinearLayout)itemView.findViewById(R.id.l_containe_row);
        }
    }
}

Answer 1

我建议创建一个 ToggleButtons 的动态数组列表，如下所示:

        private ArrayList<ToggleButton> buttons;

        public MyListAdapter(Context context ,MyListData[] listdata , RecyclerViewClickListener mListener) { 
            this.mListener =mListener;
            this.listdata = listdata;
            this.context = context;
            this.buttons = new ArrayList<>();
        }

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            LayoutInflater layoutInflater = LayoutInflater.from(parent.getContext());
            View listItem= layoutInflater.inflate(R.layout.row_list_azcar, parent, false);
            ViewHolder viewHolder = new ViewHolder(listItem);
            return viewHolder;
        }


        @Override
        public void onBindViewHolder(ViewHolder holder, int position) {
            final MyListData myListData = listdata[position];
            holder.textView.setText(listdata[position].getDescription());
            buttons.add(holder.playBtn);

       ...
         private void closeAll(){
            for(int j=0; j<buttons.size(); j++) {
                buttons.get(j).setBackgroundResource(R.drawable.btnpause);
            }
         }