组合控件加减

自定义加减
public class Title extends LinearLayout{
TextView text_jia,text_num,text_jian;
int ss=0;
MyCallBack myCallBack;
public Title(Context context) {
super(context);
}

public Title(Context context, AttributeSet attrs) {
    super(context, attrs);
    View view = LayoutInflater.from(context).inflate(R.layout.title_layout,this);
    text_jia = view.findViewById(R.id.text_jia);
    text_num = view.findViewById(R.id.text_num);
    text_jian = view.findViewById(R.id.text_jian);

    text_jia.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            ss++;
            text_num.setText(ss+"");
            myCallBack.sdfkaljd(ss);
        }
    });
    text_jian.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            if(ss==1){
                ss=1;
            }else{
                ss--;
                text_num.setText(ss+"");
                myCallBack.sdfkaljd(ss);
            }

        }
    });

}

public Title(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
}

public void text_zhi(int ss){
this.ss=ss;
text_num.setText(ss+"");
}
public interface MyCallBack{
public void sdfkaljd(int summ);
}

public void setMyCallBack(MyCallBack myCallBack) {
    this.myCallBack = myCallBack;
}

}

适配器

public class ShowAdapter extends RecyclerView.Adapter {
List list;
Context context;

public ShowAdapter(List list, Context context) {
    this.list = list;
    this.context = context;
}

@NonNull
@Override
public Holder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
 View view = LayoutInflater.from(context).inflate(R.layout.show_layout,null);

    return new Holder(view);
}

@Override
public void onBindViewHolder(@NonNull Holder holder, final int i) {

    holder.text_view.setText(list.get(i).getTitle());
    holder.simpleDraweeView.setImageURI(list.get(i).getPicUrl());
    holder.title.text_zhi(list.get(i).num);

    holder.title.setMyCallBack(new Title.MyCallBack() {
        @Override
        public void sdfkaljd(int summ) {
            list.get(i).num=summ;
        }
    });
}

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

public class Holder extends RecyclerView.ViewHolder{
    SimpleDraweeView simpleDraweeView;
    TextView text_view;
    Title title;
    public Holder(@NonNull View itemView) {
        super(itemView);
        simpleDraweeView = itemView.findViewById(R.id.simpleDraweeView);
        text_view = itemView.findViewById(R.id.text_view);
        title = itemView.findViewById(R.id.titles);
    }

}
}