samiuelson

class LifecycleAwareLazy<T>(lifecycle: Lifecycle, private val initializer: () -> T) :
        Lazy<T>, GenericLifecycleObserver {

    init {
        lifecycle.addObserver(this)
    }

    private object UNINITIALIZED_VALUE

    private var _value: Any? = UNINITIALIZED_VALUE

samiuelson

class MyUnitTest {
    @get:Rule
    val coroutineRule = TestCoroutineRule()
  
    @Test
    fun `my test executed on TestCoroutineDispatcher`() = coroutineRule.runBlockingTest {
        assertEquals(42, answer())
    }
}

samiuelson

...    
<com.pierfrancescosoffritti.androidyoutubeplayer.core.player.views.YouTubePlayerView ... />
    
    <!-- Translucent gradient overlay background to make chat more visible -->
    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:background="@drawable/bg_chat"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="@+id/messagesList" />

samiuelson

package io.getstream.livestreamclone

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import io.getstream.chat.android.client.models.Message
import kotlinx.android.synthetic.main.item_message.view.*

samiuelson

class LiveStreamActivity : AppCompatActivity(R.layout.activity_main) {
    private val adapter = MessagesListAdapter()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        loadMockVideoStream()
        messagesList.adapter = adapter

        val viewModel: LiveStreamViewModel by viewModels()

samiuelson

class LiveStreamViewModel() : ViewModel() {
    private val chatClient = ChatClient.instance()
    private val _viewState = MutableLiveData<State>()

    private lateinit var channelController: ChannelController

    val viewState: LiveData<State> = _viewState

    init {
        chatClient.setUser(chatUser, USER_TOKEN, object : InitConnectionListener() {

samiuelson

    companion object {
        private const val USER_ID = "bob"
        private const val CHANNEL_TYPE = "livestream"
        private const val CHANNEL_ID = "livestream-clone-android" // You'll want to make it unique per video
        private const val USER_TOKEN = BuildConfig.USER_TOKEN

        private val chatUser = User(id = USER_ID).apply {
            name = USER_ID
            image = getDummyAvatar(USER_ID)
        }

samiuelson

    private fun requestChannel() {
        val channelData = mapOf("name" to "Live stream chat")
        val request = QueryChannelRequest()
            .withData(channelData)
            .withMessages(20)
            .withWatch()

        channelController.query(request).enqueue {
            if (it.isSuccess) {
                _viewState.postValue(State.Messages(it.data().messages))

samiuelson

class LiveStreamActivity : AppCompatActivity(R.layout.activity_main) {
    private val adapter = MessagesListAdapter()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        loadMockVideoStream()
        messagesList.adapter = adapter

        val viewModel: LiveStreamViewModel by viewModels()

samiuelson

class LiveStreamActivity : AppCompatActivity(R.layout.activity_main) {
    private val adapter = MessagesListAdapter()

    private val messageListSmoothScroller by lazy {
        object : LinearSmoothScroller(this) {
            val MILLISECONDS_PER_INCH = 400f

            override fun calculateSpeedPerPixel(displayMetrics: DisplayMetrics?): Float {
                return MILLISECONDS_PER_INCH / displayMetrics!!.densityDpi
            }