JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
suspend fun printPrimes() {
    while(true) { // Ok-ish because we call delay inside
        // Compute
        delay(1000)
    }
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
suspend fun printPrimes() {
    while(isActive) {
        // Compute
    }
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

liveData(Dispatchers.IO) {
    emit(LOADING_STRING)
    emitSource(dataSource.fetchWeather())
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
private val itemId = MutableLiveData<String>()
val result = itemId.switchMap {
    liveData { emit(fetchItem(it)) }
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
class MyViewModel : ViewModel() {
    val result = liveData {
        emit(doComputation())
    }
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
// Don't do this. Use liveData instead.
class MyViewModel : ViewModel() {
    private val _result = MutableLiveData<String>()
    val result: LiveData<String> = _result

    init {
        viewModelScope.launch {

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->
   
class MyActivity : Activity {
    override fun onCreate(state: Bundle?) {
        super.onCreate(savedInstanceState)

        lifecycleScope.launch {
            // Run
        }

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

class MainActivityViewModel : ViewModel {

    init {
        viewModelScope.launch {
            // Do things!
    
        }    

JoseAlcerreca

/* Copyright 2019 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */
@Test
fun isLiveDataEmitting_getOrAwaitValue() {
    viewModel.setNewValue("foo")

    // Pass:
    assertEquals(viewModel.liveData1.getOrAwaitValue(), "foo")
    assertEquals(viewModel.liveData2.getOrAwaitValue(), "FOO")
}

JoseAlcerreca

/* Copyright 2019 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */
@Test
fun isLiveDataEmitting_getOrAwaitValue() {
    viewModel.setNewValue("foo")

    // Pass:
    assertEquals(viewModel.liveData1.getOrAwaitValue(), "foo")
    assertEquals(viewModel.liveData2.getOrAwaitValue(), "FOO")
}