RecyclerView实现滚动效果-Android

1.先在build.gdrdle(module)先添加依赖

implementation 'androidx.recyclerview:recyclerview:1.0.0'

2.在我们mainActivity.xml下添加以下代码，这样就把我们的RecyclerView成功添加引入到mainActivity.xml下

 3.创建一个person类

public class Person {

    private String name;
    private String  age;
    private String  sex;

    public Person(String name, String age, String sex) {
        this.name = name;
        this.age = age;
        this.sex = sex;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}

4.创建一个person_item.xml布局

5.为RecyclerView准备一个适配器，新建一个PersonAdapter类，让这个适配器继承RexyclerView.Adapter,并将泛型指定为PersonAdapter.ViewHolder,其中ViewHolder是我们PersonAdapter中定义的一个内部类。

public class PersonAdapter extends RecyclerView.Adapter {

    private List mPerson;//创建一个list集合

    static class ViewHolder extends RecyclerView.ViewHolder{

        TextView name,age,sex;

        public ViewHolder(@NonNull View view) {
            super(view);
            //在这里将我们person_item.xml里面的布局进行绑定
            name=view.findViewById(R.id.person_name);
            age=view.findViewById(R.id.person_age);
            sex=view.findViewById(R.id.person_sex);
        }
    }

    public PersonAdapter() {
    }

    public PersonAdapter(List mPerson) {
        this.mPerson = mPerson;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).
                inflate(R.layout.activity_person_item, parent, false);
        ViewHolder holder = new ViewHolder(view);
        return holder;
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Person person = mPerson.get(position);
        holder.name.setText(person.getName());
        holder.age.setText(person.getAge());
        holder.sex.setText(person.getSex());
    }


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

6.接着编写我们的mainactivity

public class MainActivity extends AppCompatActivity {

    private List personList = new ArrayList<>();

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

        initPerson();
        //绑定我们的布局 

7.那么最后就是运行一下了

扩展：RecyclerView的点击事件

在我们view Holder这个内部类进行修改

 static class ViewHolder extends RecyclerView.ViewHolder{

        TextView name,age,sex;

        View personView;
        
        public ViewHolder(@NonNull View view) {
            super(view);
            personView=view;
            //在这里将我们person_item.xml里面的布局进行绑定
            name=view.findViewById(R.id.person_name);
            age=view.findViewById(R.id.person_age);
            sex=view.findViewById(R.id.person_sex);
        }
    }

在onBindViewHolder方法里面添加代码进行监听事件

 @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Person person = mPerson.get(position);
        holder.name.setText(person.getName());
        holder.age.setText(person.getAge());
        holder.sex.setText(person.getSex());

        holder.name.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(view.getContext(), "我点击的是"+person.getName(), Toast.LENGTH_SHORT).show();
            }
        });
        holder.age.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(view.getContext(), "我点击的是"+person.getAge(), Toast.LENGTH_SHORT).show();
            }
        });
        holder.sex.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(view.getContext(), "我点击的是"+person.getSex(), Toast.LENGTH_SHORT).show();
            }
        });

    }