llama.cpp/examples/llama.android/app/src/main/java/com/example/llama/MessageAdapter.kt


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package com.example.llama

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView

data class Message(
    val id: String,
    val content: String,
    val isUser: Boolean
)

class MessageAdapter(
    private val messages: List<Message>
) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {

    companion object {
        private const val VIEW_TYPE_USER = 1
        private const val VIEW_TYPE_ASSISTANT = 2
    }

    override fun getItemViewType(position: Int): Int {
        return if (messages[position].isUser) VIEW_TYPE_USER else VIEW_TYPE_ASSISTANT
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
        val layoutInflater = LayoutInflater.from(parent.context)
        return if (viewType == VIEW_TYPE_USER) {
            val view = layoutInflater.inflate(R.layout.item_message_user, parent, false)
            UserMessageViewHolder(view)
        } else {
            val view = layoutInflater.inflate(R.layout.item_message_assistant, parent, false)
            AssistantMessageViewHolder(view)
        }
    }

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
        val message = messages[position]
        if (holder is UserMessageViewHolder || holder is AssistantMessageViewHolder) {
            val textView = holder.itemView.findViewById<TextView>(R.id.msg_content)
            textView.text = message.content
        }
    }

    override fun getItemCount(): Int = messages.size

    class UserMessageViewHolder(view: View) : RecyclerView.ViewHolder(view)
    class AssistantMessageViewHolder(view: View) : RecyclerView.ViewHolder(view)
}