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class MainActivity : AppCompatActivity() {
    private val viewModel: MainViewModel by viewModel()
    private val itemRecyclerAdapter = ItemRecyclerAdapter()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // koin 初期化
        startKoin {
            androidLogger()
            androidContext(applicationContext)
            modules(appModule)
        }

        val binding: ActivityMainBinding = DataBindingUtil.setContentView(this, R.layout.activity_main)
        binding.viewModel = viewModel
        binding.itemRecyclerView.layoutManager = LinearLayoutManager(applicationContext).apply {
            orientation = RecyclerView.VERTICAL
        }
        binding.itemRecyclerView.adapter = itemRecyclerAdapter
        binding.itemRecyclerView.setHasFixedSize(true)
        viewModel.items.observe(this, androidx.lifecycle.Observer {
            itemRecyclerAdapter.submitList(it)
        })
    }
}