MaterialDesign(二)

最新推荐文章于 2024-05-07 10:02:15 发布

SkylakeXun

最新推荐文章于 2024-05-07 10:02:15 发布

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分类专栏：代码库

本文链接：https://blog.youkuaiyun.com/SkylakeXun/article/details/76447661

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本文详细介绍了RecyclerView的使用方法，包括依赖配置、Adapter的实现、布局管理器的设置及自定义点击事件等，帮助读者快速掌握这一高效的数据展示控件。

RecyclerView

5.0后Google对使用了很久的ListView做了升级,增加了一个使用更方便,效率更高的控件

依赖:

compile 'com.android.support:recyclerview-v7:25.0.+'

adapter:

public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.ViewHolder> {
ArrayList<String> mDatas;
public MyRecyclerAdapter(ArrayList<String> datas) {
    mDatas = datas;
}

//创建一个内部类继承于RecyclerView.ViewHolder
public class ViewHolder extends RecyclerView.ViewHolder{
    public TextView tv;
    public ViewHolder(View itemView) {
        super(itemView);//父类的super()是将该itemview赋予给父类的itemview,若itemView为空则抛出一个异常
        tv= (TextView) itemView;
        tv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //完成itemclick监听事件的回调
                if (mListener!=null){
                    mListener.onItemClick(v,getPosition());
                }
            }
        });
    }
}

//封装好的viewholder方法,将自己创建的ViewHolder与adapter关联起来
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1, parent, false);
    //返回的是自己创建的ViewHolder对象
    return new ViewHolder(view);
}
//将数据状态到ViewHolder中,这里的viewholder就是onCreateViewHolder()返回的viewholder
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    holder.tv.setText(mDatas.get(position));
}
@Override
public int getItemCount() {
    return mDatas.size();
}

//进阶,创建监听事件,因为recycler没有像listview那样的itemclicklistener
public interface OnItemClickListener{
    void onItemClick(View view,int position);
}
OnItemClickListener mListener;
public void setListener(OnItemClickListener listener){
    mListener=listener;
}
}

recyclerview:

    private void initView() {
    //获取recyclerview 
    recyclerview = (RecyclerView) findViewById(R.id.recyclerview);
    //模拟数据
    ArrayList<String> strs=new ArrayList<>();
    for (int i = 0; i < 10; i++) {
        strs.add("展示数据"+i);
    }
    //设置adapter
    MyRecyclerAdapter myRecyclerAdapter = new MyRecyclerAdapter(strs);
    recyclerview.setAdapter(myRecyclerAdapter);
    //设置了adapter发现并没有数据展示出来,因为还需要设置布局样式
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
    GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 3);
    recyclerview.setLayoutManager(gridLayoutManager);
    //设置显示动画
    recyclerview.setItemAnimator(new DefaultItemAnimator());
}

自定义onitemclick事件

        //实现自定义的点击效果
        myRecyclerAdapter.setListener(new MyRecyclerAdapter.OnItemClickListener() {
        @Override
        public void onItemClick(final View view, final int position) {
            view.animate()
                    .translationX(15000f)
                    .setDuration(300)
                    .setListener(new AnimatorListenerAdapter() {
                        @Override
                        public void onAnimationEnd(Animator animation) {
                            super.onAnimationEnd(animation);
                            view.animate().
                                    setListener(new AnimatorListenerAdapter() {
                                        @Override
                                        public void onAnimationEnd(Animator animation) {
                                            super.onAnimationEnd(animation);
                                            strs.remove(position);
                                            myRecyclerAdapter.notifyDataSetChanged();
                                        }
                                    })
                                    .translationX(0f)
                                    .setDuration(300).start();
                        }
                    }).start();

        }
    });