RecyclerView简单使用

1. implementation ‘androidx.recyclerview:recyclerview:1.0.0’
2. xml使用

	<androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/rv"/>

3. 重写RecyclerView.Adapter

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private Context context;
    String str = {1,2,3};
    public MyAdapter(Context context) {
        this.context = context;
    }

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

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        holder.textView.setText(str[position]);
    }

    @Override
    public int getItemCount() {
        return str.length;
    }

    static class ViewHolder extends  RecyclerView.ViewHolder{
        TextView textView ;
        ViewHolder(View view){
            super(view);
            textView = view.findViewById(R.id.mrv_tv);
        }
    }
}`

4. Activity中适配

		LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(RecyclerView.VERTICAL);
        RecyclerView recyclerView = findViewById(R.id.rv);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(linearLayoutManager);
        recyclerView.setAdapter(new MyAdapter(this));