day 12

 

1. 리사이클러 뷰 다시

 

 

build.gradle(:app)

viewBinding{
    enabled = true
}

 

 

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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/my_recyclerview"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:listitem="@layout/recycler_item" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/floatingActionButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:src="@android:drawable/ic_menu_add"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        />
</androidx.constraintlayout.widget.ConstraintLayout>

recycler_item.xml

<?xml version="1.0" encoding="utf-8"?>
<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="40dp"
    android:paddingVertical="5dp"
    >

    <ImageView
        android:id="@+id/img_rv_photo"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:src="@color/black"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        />

    <TextView
        android:id="@+id/tv_item"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:text="이름"
        />

</LinearLayout>

 

Member.kt

package com.example.recycler_view_test_2

data class Member (val name:String, val img:Int)

 

MyAdapter.kt

package com.example.recycler_view_test_2

import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView
import com.example.recycler_view_test_2.databinding.RecyclerItemBinding

class MyAdapter : RecyclerView.Adapter<Holder>() {

    var listData = mutableListOf<Member>();

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): Holder {
        val binding = RecyclerItemBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        return Holder(binding)
    }

    override fun onBindViewHolder(holder: Holder, position: Int) {
        val member = listData[position]
        holder.setData(member)
    }

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

}

class Holder(var binding:RecyclerItemBinding) : RecyclerView.ViewHolder(binding.root){

    fun setData(member:Member){
        binding.tvItem.text = member.name
        binding.imgRvPhoto.setImageResource(member.img)
    }
}

MainActivity.kt

package com.example.recycler_view_test_2

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import androidx.recyclerview.widget.LinearLayoutManager
import com.example.recycler_view_test_2.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

    private lateinit var binding:ActivityMainBinding
    private val data : MutableList<Member> = mutableListOf()
    var i=4

    private val thumbs = arrayOf(R.drawable.profile1,R.drawable.profile2);

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityMainBinding.inflate(layoutInflater)
        val view = binding.root
        setContentView(view)
        _initialize();
        _refreshRecylcerView()

        binding.floatingActionButton.setOnClickListener{

            val string = "Member$i"
            i++

            val j = (i%thumbs.size)
            Log.i("PAUL", "click click click click  j : $j")
            data.add(Member(string, thumbs[j]))
            _refreshRecylcerView()
        }
    }

    private fun _initialize(){
        with(data){
            add(Member("Member1", thumbs[0]))
            add(Member("Member2", thumbs[1]))
            add(Member("Member3", thumbs[0]))
        }
    }

    private fun _refreshRecylcerView(){
        val adapter = MyAdapter()
        adapter.listData = data
        binding.myRecyclerview.adapter = adapter
        binding.myRecyclerview.layoutManager = LinearLayoutManager(this)
    }
}

 

 

그외

fab 에 android:clickable="true" 필요함???


xml의 recyclerview에  item 적용
tools:listitem="@layout/recycler_item"