CODEWITHSUNDEEP
androidkotlinandroid-recyclerviewandroid-viewpager2
jakchang
jakchang

Reputation: 452

ViewPager2 doesn't show up

I use ViewPager2. So I followed some example And wrote codes. But I don't understand why it doesn't work. I don't think this code I wrote is wrong. please let me know why I can't see anything. I know that the implementation of ViewPager2 is like RecyclerView adapter, So I followed that.

class UserAdapter(context: Context,userList : List<User>) : RecyclerView.Adapter<UserAdapter.UserViewHolder>() {


    val mContext = context
    val mUserList : List<User> = userList

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): UserViewHolder {

        var view = LayoutInflater.from(mContext).inflate(R.layout.item,parent,false)
        return UserViewHolder(view)
    }

    override fun getItemCount(): Int =0

    override fun onBindViewHolder(holder: UserViewHolder, position: Int) {
        holder.icon.setImageResource(mUserList.get(position).icon)
        holder.textname.text = mUserList.get(position).name
        holder.textage.text = mUserList.get(position).age
    }

    class UserViewHolder internal constructor(itemView: View) :
        RecyclerView.ViewHolder(itemView){
        lateinit var icon :ImageView
        lateinit var textname: TextView
        lateinit var textage: TextView

        init{
            icon = itemView.findViewById(R.id.icon)
            textname = itemView.findViewById(R.id.textView)
            textage = itemView.findViewById(R.id.textView2)
        }

    }
}

class MainActivity : AppCompatActivity() {

    private lateinit var userList: ArrayList<User>
    private lateinit var binding: ActivityMainBinding
    private lateinit var userAdapter:UserAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(getLayoutInflater());
        setContentView(binding.root);
        userList = arrayListOf()
        userList.add(User(R.drawable.child,"child","21"))
        userList.add(User(R.drawable.sun,"sun","22"))
        userList.add(User(R.drawable.moon,"moon","23"))

        userAdapter = UserAdapter(this,userList)
        binding.viewpager2.adapter = userAdapter
    }

}

Upvotes: 1

Views: 1076

Answers (1)

yash786
yash786

Reputation: 1151

Change or replace override fun getItemCount(): Int =0

override fun getItemCount(): Int = mUserList.size()

Upvotes: 2

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