Paging Lib Blog MainActivity.kt

MainActivity.kt

var screenshotLoader: ScreenshotLoader? = null
var adapter: ScreenshotPickerAdapter? = null

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    screenshotLoader = SAFScreenshotLoader(contentResolver, diskExecutor)
    adapter = ScreenshotPickerAdapter(this)
    val recycler = findViewById(R.id.main_recycler) as RecyclerView?
    recycler?.layoutManager = GridLayoutManager(this, 2)
    recycler?.adapter = adapter
    loadScreenshots()
}

private fun loadScreenshots() {
    screenshotLoader?.allScreenshots({
        if (!isDestroyed()) {
            runOnUiThread {
                if (!isDestroyed()) {
                    adapter?.setList(it)
                }
            }
        }
    })
}