Question

原谅我的英语。

我的列表包含100个项目。每个项目都包含两个复选框，我希望每次单击一个复选框时滚动到下一个项目。

请给我最好的答案链接如果这个问题已经得到解答

这是我的自定义适配器

 public class CustomAdapter extends 
       RecyclerView.Adapter<CustomAdapter.MyViewHolder> {

private ArrayList answerFirst;
private ArrayList answerSecond;
private Context context;

public CustomAdapter(Context  context, ArrayList questionList, ArrayList 
answerFirst, ArrayList answerSecond) {
    this.context = context;
    this.answerFirst = answerFirst;
    this.answerSecond = answerSecond;
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = 
    LayoutInflater.from(parent.getContext()).inflate(R.layout.test_items, 
    parent, false);
    return new MyViewHolder(v);
}

@Override
public void onBindViewHolder(final MyViewHolder holder, final int position) 
    {

        holder.firstanswer.setText(answerFirst.get(position).toString());
        holder.secondanswer.setText(answerSecond.get(position).toString());
    }

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

public class MyViewHolder extends RecyclerView.ViewHolder {
    TextView question;
    CheckBox firstanswer;
    CheckBox secondanswer;
    public MyViewHolder(View itemView) {
        super(itemView);
        question = (TextView) itemView.findViewById(R.id.question_text);
        firstanswer = (CheckBox) itemView.findViewById(R.id.first_answer);
        secondanswer = (CheckBox) itemView.findViewById(R.id.second_answer);
             }
        }
   }

这是主要活动

 @Override
 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_start_test);

    final RecyclerView recyclerView = (RecyclerView) 
    findViewById(R.id.recyclerView_test);
    final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getApplicationContext());
    recyclerView.setLayoutManager(linearLayoutManager); 

    final CustomAdapter customAdapter = new CustomAdapter(mainActivity.this, answerFirst,answerSecond);
    recyclerView.setAdapter(customAdapter);
}

Answer 1

您可以通过在主类中使用适配器类并在复选框的侦听器方法中滚动到所需位置，因为RecyclerView是一个全局变量，您可以访问它并滚动到所需位置。

ionic cordova emulate ios -lc

否则在构造函数中传递RecyclerView的实例并执行相同的

并通过Error: Runtime error

获取适配器内的当前项目位置

或者你可以像这样使用布局管理器

rv.scrollToPosition(youPositionInTheAdapter)

如何通过单击每个项目中的复选框滚动到下一个项目（recyclerview）

1 个答案: