Levi-Moreira

Surface(
    modifier = Modifier.fillMaxSize(),
    color = MaterialTheme.colorScheme.background
) {
    val appBarMaxHeightPx = with(LocalDensity.current) { AppBarHeight.roundToPx() }
    val connection = remember(appBarMaxHeightPx) {
        CollapsingAppBarNestedScrollConnection(appBarMaxHeightPx)
    }
    val density = LocalDensity.current
    val spaceHeight by remember(density) {

Levi-Moreira

Surface(
   modifier = Modifier.fillMaxSize(),
   color = MaterialTheme.colorScheme.background
) {
   val appBarMaxHeightPx = with(LocalDensity.current) { AppBarHeight.roundToPx() }
   val connection = remember(appBarMaxHeightPx) {
       CollapsingAppBarNestedScrollConnection(appBarMaxHeightPx)
   }

   Box(Modifier.nestedScroll(connection)) {

Levi-Moreira

private class CollapsingAppBarNestedScrollConnection(
    val appBarMaxHeight: Int
) : NestedScrollConnection {

   var appBarOffset: Int by mutableIntStateOf(0)
       private set

   override fun onPreScroll(available: Offset, source: NestedScrollSource): Offset {
       val delta = available.y.toInt()
       val newOffset = appBarOffset + delta

Levi-Moreira

override fun onPreScroll(available: Offset, source: NestedScrollSource): Offset {
       val delta = available.y.toInt()
       val newOffset = appBarOffset + delta
       val previousOffset = appBarOffset
       appBarOffset = newOffset.coerceIn(-appBarMaxHeight, 0)
       val consumed = appBarOffset - previousOffset
       return Offset(0f, consumed.toFloat())
   }

Levi-Moreira

val appBarOffset by remember { mutableIntStateOf(0) }

Surface(
   modifier = Modifier.fillMaxSize(),
   color = MaterialTheme.colorScheme.background
) {
   val connection = remember {
       object : NestedScrollConnection {
           override fun onPreScroll(
               available: Offset,

Levi-Moreira

val appBarOffset by remember { mutableIntStateOf(0) }

Surface(
   modifier = Modifier.fillMaxSize(),
   color = MaterialTheme.colorScheme.background
) {
   Box {
       LazyColumn(contentPadding = PaddingValues(top = AppBarHeight)) {
           items(Contents) {
               ListItem(item = it)

Levi-Moreira

val AppBarHeight = 56.dp
val Purple40 = Color(0xFF6650a4)

Surface(
   modifier = Modifier.fillMaxSize(),
   color = MaterialTheme.colorScheme.background
) {
   Box {
       LazyColumn(contentPadding = PaddingValues(top = AppBarHeight)) {
           items(Contents) {

Levi-Moreira

<application
  android:name="com.levimoreira.cinemabuff.infrastructure.application.CinemaBuffApp"
  android:allowBackup="true"
  android:icon="@mipmap/ic_launcher"
  android:label="@string/app_name"
  android:networkSecurityConfig="@xml/network_security_config">      
        ...
</application>

Levi-Moreira

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <debug-overrides>
        <trust-anchors>
            <certificates src="user" />
        </trust-anchors>
    </debug-overrides>
</network-security-config>

Levi-Moreira

@RunWith(AndroidJUnit4::class)
class SampleTest {

    private lateinit var personDao: PersonDao
    private lateinit var db: AppDatabase

    @Before
    fun createDb() {
        db = Room.inMemoryDatabaseBuilder(
                InstrumentationRegistry.getContext(), AppDatabase::class.java).build()