简单讲讲RecyclerView的使用：（这里用的是androidX，而不是之前的supprot-v7，用法基本一样）
1、引入recyclerView的依赖库：
implementation 'androidx.recyclerview:recyclerview:1.0.0'
2、主布局内添加RecyclerView的布局控件
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <androidx.recyclerview.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="match_parent" android:layout_height="match_parent"/> </LinearLayout>
3、添加一个适配器，继承自RecyclerView.Adapter
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> { //这里的要实现ViewHolder，ListView里没有强制使用ViewHolder Context context; List<String> list; public RecyclerAdapter(Context context, List<Data> list) { //这里添加一个构造方法，方便使用 this.context = context; this.list = list; } @NonNull @Override public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { //实例化ViewHolder，并通过inflate来把ItemView传递过去 ViewHolder viewHolder=new ViewHolder(View.inflate(context,R.layout.recycler_item,null)); return viewHolder; } @Override public void onBindViewHolder(@NonNull ViewHolder holder, int position) { holder.textView.setText(list.get(position).getTiTle()); } @Override public int getItemCount() { return list.size(); //返回列表的大小 } class ViewHolder extends RecyclerView.ViewHolder { TextView textView; public ViewHolder(@NonNull View itemView) { super(itemView); textView=itemView.findViewById(R.id.textView); } } } 4、Data类
public class Data { String title; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } } 5、Activity
public class MainActivity extends AppCompatActivity { List<Data> list; RecyclerAdapter adapter; RecyclerView recyclerView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); recyclerView=findViewById(R.id.recyclerView); list=new ArrayList<>(); adapter=new RecyclerAdapter(this,list); //实例化适配器 recyclerView.setLayoutManager(new LinearLayoutManager(this)); //设置布局管理器，如果实现网格布局，可以用GridLayoutManager recyclerView.setAdapter(adapter); //设置适配器 } } 在适配器里添加回调接口实现：
@Override public void onBindViewHolder(@NonNull ViewHolder holder, final int position) { holder.textView.setText(list.get(position).getTitle()); /*********************************/ holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { onItemClickListener.onItemClick(position); } }); holder.itemView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { onItemLongClickListener.onItemLongClick(position); return true; } }); /**************************************/ } /*实现单击和长按*/ OnItemLongClickListener onItemLongClickListener; OnItemClickListener onItemClickListener; interface OnItemClickListener{ void onItemClick(int position); } interface OnItemLongClickListener{ void onItemLongClick(int position); } public void setOnItemClickListener(OnItemClickListener onItemClickListener){ this.onItemClickListener=onItemClickListener; } public void setOnItemLongClickListener(OnItemLongClickListener onItemLongClickListener){ this.onItemLongClickListener=onItemLongClickListener; } /*实现单击和长按*/ ---Activity
adapter.setOnItemClickListener(new RecyclerAdapter.OnItemClickListener() { @Override public void onItemClick(int position) { Toast.makeText(MainActivity.this, "pos"+position, Toast.LENGTH_SHORT).show(); } });