Room Advanced - 5 (Adapter)

 

	class MainActivity : AppCompatActivity() {
	private val viewModel : MainViewModel by viewModels()
	lateinit var numberArrayList : ArrayList<NumberEntity>
	override fun onCreate(savedInstanceState: Bundle?) {
	super.onCreate(savedInstanceState)
	setContentView(R.layout.activity_main)
	// Create
	val createBtn = findViewById<Button>(R.id.create)
	createBtn.setOnClickListener {
	val ranNumber = (0..100).random().toString()
	val userEntity = NumberEntity(0, ranNumber)
	viewModel.create(userEntity)
	}
	// Read
	val numberRV = findViewById<RecyclerView>(R.id.numberRV)
	viewModel.read()
	viewModel.numberEntityList.observe(this, Observer {
	Log.d("Main", it.toString())
	numberArrayList = it as ArrayList<NumberEntity>
	val customAdapter = CustomAdapter(numberArrayList)
	numberRV.adapter = customAdapter
	})
	numberRV.layoutManager = LinearLayoutManager(this)
	}
	}

view raw MainActivity.kt hosted with ❤ by GitHub

	class CustomAdapter(private val dataSet: ArrayList<NumberEntity>) : RecyclerView.Adapter<CustomAdapter.ViewHolder>() {
	class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
	val idArea: TextView
	val randomNum : TextView
	init {
	idArea = view.findViewById(R.id.id)
	randomNum = view.findViewById(R.id.randomNum)
	}
	}
	override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): ViewHolder {
	val view = LayoutInflater.from(viewGroup.context).inflate(R.layout.number_item, viewGroup, false)
	return ViewHolder(view)
	}
	override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {
	viewHolder.idArea.text = dataSet[position].id.toString()
	viewHolder.randomNum.text = dataSet[position].randomNumber
	}
	override fun getItemCount() = dataSet.size
	}

view raw CustomAdapter.kt hosted with ❤ by GitHub

	class MainViewModel : ViewModel() {
	private val repository = Repository()
	lateinit var numberEntityList : LiveData<List<NumberEntity>>
	fun create(userEntity: NumberEntity) = viewModelScope.launch(Dispatchers.IO){
	repository.create(userEntity)
	}
	fun read() {
	numberEntityList = repository.read().asLiveData()
	}
	fun update(){
	}
	fun delete(){
	}
	}

view raw MainViewModel.kt hosted with ❤ by GitHub