RecyclerView的监听(接口回调，自定义)

最新推荐文章于 2021-07-24 21:04:18 发布

原创最新推荐文章于 2021-07-24 21:04:18 发布 · 1k 阅读

CC 4.0 BY-SA版权

依赖

implementation 'com.android.support:recyclerview-v7:27.1.1'

MainActivity代码
调用适配器，传值

public class MainActivity extends AppCompatActivity {

    private RecyclerView recycler;
    private List<String> titleName;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化数据
        initData();
        recycler = (RecyclerView) findViewById(R.id.recycler);
        //设置布局
        LinearLayoutManager manager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
        recycler.setLayoutManager(manager);
        //开启适配器
        MyRecyclerAdapter myRecyclerAdapter = new MyRecyclerAdapter(titleName, MainActivity.this);
        recycler.setAdapter(myRecyclerAdapter);
        //监听方法
        myRecyclerAdapter.setOnItemClickLisitenter(new RecycleViewLisitenter.onItemClickLisitenter() {
            @Override
            public void onItemClick(View v, int position) {
                Toast.makeText(MainActivity.this,position+"",Toast.LENGTH_SHORT).show();
            }
        });
    }

    private void initData() {
        titleName = new ArrayList<>();
        for (int i = 0;i < 100 ;i++){
            titleName.add("第"+i+"个");
        }
    }

}

MyRecyclerAdapter
这是我的适配器，在适配器里边写点击事件的构造方法，进行引用我自定义的接口

public class MyRecyclerAdapter extends RecyclerView.Adapter implements View.OnClickListener, View.OnLongClickListener {
    private List<String> list;
    private Context context;

    public MyRecyclerAdapter(List<String> list, Context context) {
        this.list = list;
        this.context = context;
    }

    private RecycleViewLisitenter.onItemClickLisitenter onItem;
    private RecycleViewLisitenter.onItemLongClickLisitenter onLongItem;

    public void setOnItemClickLisitenter(RecycleViewLisitenter.onItemClickLisitenter onItem) {
        this.onItem = onItem;
    }

    public void setOnItemLongClickLisitenter(RecycleViewLisitenter.onItemLongClickLisitenter onLongItem) {
        this.onLongItem = onLongItem;
    }



    class MyHoder extends RecyclerView.ViewHolder {
        public TextView text;
        public MyHoder(View itemView) {
            super(itemView);
            text = itemView.findViewById(R.id.txt_title);
        }
    }

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = View.inflate(context, R.layout.item, null);
        view.setOnClickListener(this);
        view.setOnLongClickListener(this);
        MyHoder myHoder = new MyHoder(view);
        return myHoder;
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
        MyHoder myHoder = (MyHoder) holder;
        myHoder.itemView.setTag(position);
        myHoder.text.setText(list.get(position));
    }

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

    @Override
    public void onClick(View view) {
            if(onItem!=null){
                onItem.onItemClick(view, (Integer) view.getTag());
            }
    }

    @Override
    public boolean onLongClick(View view) {
        if(onLongItem!=null){
            onLongItem.onItemLongClick(view, (Integer) view.getTag());
        }
        return true;
    }
}

RecycleViewLisitenter
自定义的接口，接口里边有抽象方法，自定义设置监听

public class RecycleViewLisitenter {
    public interface onItemClickLisitenter{
        void onItemClick(View v, int position);
    };

    public interface onItemLongClickLisitenter{
        void onItemLongClick(View v,int position);
    };
}

简单的接口回调就写到这里，下面是一个扩展，有兴趣可以看一下

https://www.jianshu.com/p/c4cfe38a91ed