Android中的L RecyclerView挑战 [英] Challenges in RecyclerView of Android L

问题描述

我一直在玩弄 RecyclerView 一点点。有没有简单的方法把 OnClickListener 在 RecyclerView 的项目？我曾尝试实施它在 ViewHolder 。 onclick事件从未被触发。

和我已经使用 notifyItemInserted（位置）添加新值 RecyclerView 。 的用户界面不会得到自动刷新。需要上下拉动刷新。但是，当我调用 notifyDatasetChanged（..），这是确定的。

我已经申请 DefaultItemAnimator 到 RecyclerView 。 但是，没有看到任何动画，当新的产品加入。

感谢您事先的任何想法。

这是第一款Android L成分我已经测试过了，我stucking那里。

下面是我的适配器类：

 公共类AdapterRecyclerView扩展RecyclerView.Adapter＆LT; AdapterRecyclerView.MyViewHolder＆GT; {

私人列表＆LT;字符串＆GT; arrExperiences;

//提供一个参考意见，你所使用的类型 - 自定义ViewHolder
公共类MyViewHolder扩展RecyclerView.ViewHolder {

    公众的TextView tvExperienceTitle;
    公众的TextView tvExperienceDesc;

    公共MyViewHolder（RelativeLayout的ItemView控件）{
        超（ItemView控件）;
        tvExperienceTitle =（TextView中）itemView.findViewById（R.id.tv_experience_title）;
        tvExperienceDesc =（TextView中）itemView.findViewById（R.id.tv_experience_desc）;
    }

}

//提供一个合适的构造函数：根据其种类的数据集。
公共AdapterRecyclerView（名单＆LT;字符串＆GT; arrExperiences）{
    this.arrExperiences = arrExperiences;
}

//创建新的观点：通过布局管理器调用
@覆盖
公共AdapterRecyclerView.MyViewHolder onCreateViewHolder（ViewGroup中的父母，INT viewType）{
    RelativeLayout的观点=（RelativeLayout的）LayoutInflater.from（parent.getContext（））膨胀（R.layout.view_item_recycler，父母，假）。
    MyViewHolder myViewHolder =新MyViewHolder（视图）;
    返回myViewHolder;
}

@覆盖
公共无效onBindViewHolder（AdapterRecyclerView.MyViewHolder viewHolder，INT位置）{
    //从数据集中在该位置获得元素。
    //替换与此元素的视图的内容。
    viewHolder.tvExperienceTitle.setText（arrExperiences.get（位置））;
}

@覆盖
公众诠释getItemCount（）{
    返回arrExperiences.size（）;
}

公共无效addExperience（字符串经验，INT位置）{
    arrExperiences.add（位置，经验）;
    notifyItemInserted（位置）;
    // notifyDataSetChanged（）;
}

公共无效removeExperience（）{
    INT指数=（int）的（的Math.random（）* arrExperiences.size（））;
    arrExperiences.remove（指数）;
    notifyItemRemoved（指数）;
    // notifyDataSetChanged（）;
}
}
 

解决方案

这里你得到一个简单的适配器类，它可以每个列表行的 recyclerview 。

执行 onItemClick 事件

I have been playing around with RecyclerView for a little bit. Is there any easy way to put OnClickListener for items in RecyclerView? I have tried implementing it in ViewHolder. The onClick event never got triggered.

And I have used notifyItemInserted(position) for adding new value into RecyclerView. The UI does not got refreshed automatically. Needed to pull up and down to refresh. But when I invoke notifyDatasetChanged(..), it is ok.

I have applied DefaultItemAnimator to RecyclerView. But, not seeing any animation when new item added.

Thanks advance for any idea.

This is the first Android L component I have tested out and I am stucking there.

Here is my Adapter class:

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

private List<String> arrExperiences;

//Provide a reference to the type of views that you are using - Custom ViewHolder
public class MyViewHolder extends RecyclerView.ViewHolder {

    public TextView tvExperienceTitle;
    public TextView tvExperienceDesc;

    public MyViewHolder(RelativeLayout itemView) {
        super(itemView);
        tvExperienceTitle = (TextView) itemView.findViewById(R.id.tv_experience_title);
        tvExperienceDesc = (TextView) itemView.findViewById(R.id.tv_experience_desc);
    }

}

//Provide a suitable constructor : depending on the kind of dataset.
public AdapterRecyclerView(List<String> arrExperiences){
    this.arrExperiences = arrExperiences;
}

//Create new view : invoke by a Layout Manager
@Override
public AdapterRecyclerView.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    RelativeLayout view = (RelativeLayout) LayoutInflater.from(parent.getContext()).inflate(R.layout.view_item_recycler, parent, false);
    MyViewHolder myViewHolder = new MyViewHolder(view);
    return myViewHolder;
}

@Override
public void onBindViewHolder(AdapterRecyclerView.MyViewHolder viewHolder, int position) {
    //get element from your dataset at this position.
    //replace the content of the view with this element.
    viewHolder.tvExperienceTitle.setText(arrExperiences.get(position));
}

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

public void addExperience(String experience, int position){
    arrExperiences.add(position, experience);
    notifyItemInserted(position);
    //notifyDataSetChanged();
}

public void removeExperience(){
    int index = (int) (Math.random() * arrExperiences.size());
    arrExperiences.remove(index);
    notifyItemRemoved(index);
    //notifyDataSetChanged();
}
}

解决方案

Here you get a simple Adapter class which can perform onItemClick event on each list row for the recyclerview.

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