android - 单击行时回收器 View 数据绑定(bind)

Question

我在做什么:我已经使用数据绑定(bind)显示了 ListView

我想找的东西:如何正确添加点击事件并将 toast 显示为学生姓名

Student.java

public class Student {

    private  String name;
    private  String email;

    public Student() {
    }

    public Student(String name, String email) {
        this.name = name;
        this.email = email;
    }


    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }


}

ActDemoListView.java

public class ActDemoListView extends AppCompatActivity {


    private ActDemoListViewViewModel actDemoListViewViewModel;
    private ActDemoListViewBinding actDemoListViewBinding;


    private RecyclerView recyclerView;
    private AdptStudent adptStudent;
    private List<Student> studentList = new ArrayList<>();

    /************************************* Life Cycle Methods *************************************/
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initOnCreate();
    }
    /************************************* Life Cycle Methods *************************************/

    /************************************* Init Methods *******************************************/
    /** Init OnCreate **/
    private void initOnCreate() {
        setContentView(R.layout.act_two_way_display_data);
        //Connect the view model to activity
        connectViewModel();
        //Bind the layout to activity
        bindLayoutToActivity();

        recyclerView = actDemoListViewBinding.recyclerList;
        adptStudent = new AdptStudent(studentList);
        RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
        recyclerView.setLayoutManager(mLayoutManager);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setAdapter(adptStudent);

        prepareMovieData();
    }



    /************************************* Init Methods *******************************************/


    private void connectViewModel() {
        actDemoListViewViewModel = ViewModelProviders.of(this).get(ActDemoListViewViewModel.class);
    }

    private void bindLayoutToActivity() {
        actDemoListViewBinding = DataBindingUtil.setContentView(this,R.layout.act_demo_list_view);
    }

    private void prepareMovieData() {
        Student movie = new Student("Shruthi", "user11@google.com");
        studentList.add(movie);

        movie = new Student("Shalvi", "user1@google.com");
        studentList.add(movie);

        movie = new Student("Pavan", "user2@google.com");
        studentList.add(movie);

        movie = new Student("Brijesh", "user3@google.com");
        studentList.add(movie);

        movie = new Student("Anudeep", "user4@google.com");
        studentList.add(movie);

        adptStudent.notifyDataSetChanged();
    }

}

AdptStudent.java

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


    private List<Student> studentsList = new ArrayList<>();


    public AdptStudent(List<Student> studentsList) {
        this.studentsList = studentsList;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        ListItemBinding listItemBinding = DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()),R.layout.list_item, parent, false);
        return new MyViewHolder(listItemBinding);
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        Student student = studentsList.get(position);
        holder.listItemBinding.setStudent(student);
    }

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

    public class MyViewHolder extends RecyclerView.ViewHolder {

        private ListItemBinding listItemBinding;

        public MyViewHolder(ListItemBinding ListItemBinding) {
            super(ListItemBinding.getRoot());
            this.listItemBinding=ListItemBinding;
        }
    }


}

Answer 1

有几种方法可以做到这一点。当我希望回收站 View 上的某个项目可点击时，我会这样做。

首先我创建一个界面

public interface ItemClickListener {
    void onClick(View view, int position, boolean click);
}

其次，我在 View 持有者类上添加了这些方法

    @Override
    public void onClick(View view) {
        itemClickListener.onClick(view, getAdapterPosition(), false);
    }

    public void setItemClickListener(ItemClickListener itemClickListener) {
        this.itemClickListener = itemClickListener;
    }

最后是 onBindViewHolder

@Override
public void onBindViewHolder(@NonNull final CategoryAdapter.MyViewHolder myViewHolder, int i) {

    myViewHolder.setItemClickListener(new ItemClickListener() {
        @Override
        public void onClick(View view, int position, boolean click) {
            Intent intent = new Intent(myViewHolder.context, Myclass.class);
            myViewHolder.context.startActivity(intent);
        }
    });
}

如果您希望我提供适配器的所有代码，请询问。