我看到有很多很棒的答案，令人难以置信的详细和广泛。就我而言，如果我几乎从头开始，一步一步地推理，我总是能更好地理解事情。我建议你看看这个链接，每当你有类似的问题，搜索任何解决这个问题的代码实验室。

Android Kotlin基本原理:在RecyclerView头

我看到有很多很棒的答案，令人难以置信的详细和广泛。就我而言，如果我几乎从头开始，一步一步地推理，我总是能更好地理解事情。我建议你看看这个链接，每当你有类似的问题，搜索任何解决这个问题的代码实验室。

Android Kotlin基本原理:在RecyclerView头

是的，这是可能的。

写一个通用的视图持有者:

    public abstract class GenericViewHolder extends RecyclerView.ViewHolder
{
    public GenericViewHolder(View itemView) {
        super(itemView);
    }

    public abstract  void setDataOnView(int position);
}

然后创建你的视图持有者，并让他们扩展GenericViewHolder。比如这个:

     public class SectionViewHolder extends GenericViewHolder{
    public final View mView;
    public final TextView dividerTxtV;

    public SectionViewHolder(View itemView) {
        super(itemView);
        mView = itemView;
        dividerTxtV = (TextView) mView.findViewById(R.id.dividerTxtV);
    }

    @Override
    public void setDataOnView(int position) {
        try {
            String title= sections.get(position);
            if(title!= null)
                this.dividerTxtV.setText(title);
        }catch (Exception e){
            new CustomError("Error!"+e.getMessage(), null, false, null, e);
        }
    }
}

然后是RecyclerView。适配器类看起来像这样:

public class MyClassRecyclerViewAdapter extends RecyclerView.Adapter<MyClassRecyclerViewAdapter.GenericViewHolder> {

@Override
public int getItemViewType(int position) {
     // depends on your problem
     switch (position) {
         case : return VIEW_TYPE1;
         case : return VIEW_TYPE2;
         ...
     }
}

    @Override
   public GenericViewHolder onCreateViewHolder(ViewGroup parent, int viewType)  {
    View view;
    if(viewType == VIEW_TYPE1){
        view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout1, parent, false);
        return new SectionViewHolder(view);
    }else if( viewType == VIEW_TYPE2){
        view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout2, parent, false);
        return new OtherViewHolder(view);
    }
    // Cont. other view holders ...
    return null;
   }

@Override
public void onBindViewHolder(GenericViewHolder holder, int position) {
    holder.setDataOnView(position);
}

使用Kotlin，视图类型的实现变得更加容易。下面是这个light库https://github.com/Link184/KidAdapter的示例

recyclerView.setUp {
    withViewType {
        withLayoutResId(R.layout.item_int)
        withItems(mutableListOf(1, 2, 3, 4, 5, 6))
        bind<Int> { // this - is adapter view hoder itemView, it - current item
            intName.text = it.toString()
        }
    }


    withViewType("SECOND_STRING_TAG") {
        withLayoutResId(R.layout.item_text)
        withItems(mutableListOf("eight", "nine", "ten", "eleven", "twelve"))
        bind<String> {
            stringName.text = it
        }
    }
}

虽然选择的答案是正确的，但我只是想进一步阐述它。我发现一个有用的自定义适配器为多种视图类型在RecyclerView。 它的Kotlin版本在这里。

自定义适配器如下:

public class CustomAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private final Context context;
    ArrayList<String> list; // ArrayList of your Data Model
    final int VIEW_TYPE_ONE = 1;
    final int VIEW_TYPE_TWO = 2;

    public CustomAdapter(Context context, ArrayList<String> list) { // you can pass other parameters in constructor
        this.context = context;
        this.list = list;
    }

    private class ViewHolder1 extends RecyclerView.ViewHolder {

        TextView yourView;
        ViewHolder1(final View itemView) {
            super(itemView);
            yourView = itemView.findViewById(R.id.yourView); // Initialize your All views prensent in list items
        }
        void bind(int position) {
            // This method will be called anytime a list item is created or update its data
            // Do your stuff here
            yourView.setText(list.get(position));
        }
    }

    private class ViewHolder2 extends RecyclerView.ViewHolder {

        TextView yourView;
        ViewHolder2(final View itemView) {
            super(itemView);
            yourView = itemView.findViewById(R.id.yourView); // Initialize your All views prensent in list items
        }
        void bind(int position) {
            // This method will be called anytime a list item is created or update its data
            //Do your stuff here
            yourView.setText(list.get(position));
        }
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
       if (viewType == VIEW_TYPE_ONE) {
           return new ViewHolder1(LayoutInflater.from(context).inflate(R.layout.your_list_item_1, parent, false));
       }
       //if its not VIEW_TYPE_ONE then its VIEW_TYPE_TWO
       return new ViewHolder2(LayoutInflater.from(context).inflate(R.layout.your_list_item_2, parent, false));

    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (list.get(position).type == Something) { // Put your condition, according to your requirements
            ((ViewHolder1) holder).bind(position);
        } else {
            ((ViewHolder2) holder).bind(position);
        }
    }

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

    @Override
    public int getItemViewType(int position) {
        // Here you can get decide from your model's ArrayList, which type of view you need to load. Like
        if (list.get(position).type == Something) { // Put your condition, according to your requirements
            return VIEW_TYPE_ONE;
        }
        return VIEW_TYPE_TWO;
    }
}

我有一个更好的解决方案，它允许以声明性和类型安全的方式创建多个视图类型。它是用Kotlin写的，顺便说一下，这真的很棒。

所有所需视图类型的简单视图持有者

class ViewHolderMedium(itemView: View) : RecyclerView.ViewHolder(itemView) {
    val icon: ImageView = itemView.findViewById(R.id.icon) as ImageView
    val label: TextView = itemView.findViewById(R.id.label) as TextView
}

有一个适配器数据项的抽象。注意，视图类型由特定视图持有者类(Kotlin中的KClass)的hashCode表示。

trait AdapterItem {
   val viewType: Int
   fun bindViewHolder(viewHolder: RecyclerView.ViewHolder)
}

abstract class AdapterItemBase<T>(val viewHolderClass: KClass<T>) : AdapterItem {
   override val viewType: Int = viewHolderClass.hashCode()
   abstract fun bindViewHolder(viewHolder: T)
   override fun bindViewHolder(viewHolder: RecyclerView.ViewHolder) {
       bindViewHolder(viewHolder as T)
   }
}

只有bindViewHolder需要在具体的适配器项类中重写(类型安全的方式)。

class AdapterItemMedium(val icon: Drawable, val label: String, val onClick: () -> Unit) : AdapterItemBase<ViewHolderMedium>(ViewHolderMedium::class) {
    override fun bindViewHolder(viewHolder: ViewHolderMedium) {
        viewHolder.icon.setImageDrawable(icon)
        viewHolder.label.setText(label)
        viewHolder.itemView.setOnClickListener { onClick() }
    }
}

这样的AdapterItemMedium对象的列表是适配器的数据源，它实际上接受List<AdapterItem>。见下文。

这个解决方案的重要部分是视图持有者工厂，它将提供特定ViewHolder的新实例:

class ViewHolderProvider {
    private val viewHolderFactories = hashMapOf<Int, Pair<Int, Any>>()

    fun provideViewHolder(viewGroup: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
        val (layoutId: Int, f: Any) = viewHolderFactories.get(viewType)
        val viewHolderFactory = f as (View) -> RecyclerView.ViewHolder
        val view = LayoutInflater.from(viewGroup.getContext()).inflate(layoutId, viewGroup, false)
        return viewHolderFactory(view)
    }

    fun registerViewHolderFactory<T>(key: KClass<T>, layoutId: Int, viewHolderFactory: (View) -> T) {
        viewHolderFactories.put(key.hashCode(), Pair(layoutId, viewHolderFactory))
    }
}

简单的适配器类是这样的:

public class MultitypeAdapter(val items: List<AdapterItem>) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {

   val viewHolderProvider = ViewHolderProvider() // inject ex Dagger2

   init {
        viewHolderProvider!!.registerViewHolderFactory(ViewHolderMedium::class, R.layout.item_medium, { itemView ->
            ViewHolderMedium(itemView)
        })
   }

   override fun getItemViewType(position: Int): Int {
        return items[position].viewType
    }

    override fun getItemCount(): Int {
        return items.size()
    }

    override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): RecyclerView.ViewHolder? {
        return viewHolderProvider!!.provideViewHolder(viewGroup, viewType)
    }

    override fun onBindViewHolder(viewHolder: RecyclerView.ViewHolder, position: Int) {
        items[position].bindViewHolder(viewHolder)
    }
}

创建一个新的视图类型只需要三个步骤:

创建一个视图持有者类 创建一个适配器项类(从AdapterItemBase扩展) 在ViewHolderProvider中注册视图持有者类

下面是这个概念的一个例子:android-drawer-template。

它甚至更进一步—视图类型充当旋转组件，具有可选择的适配器项。