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Anko Coroutines
Alex Saveau edited this page Jan 4, 2018
·
11 revisions
Add the anko-coroutines
dependency to your build.gradle
:
dependencies {
implementation "org.jetbrains.anko:anko-coroutines:$anko_version"
}
If your asynchronous API does not support cancellation, your coroutine may be suspended for an indefinite time period. As a coroutine holds the strong references to captured objects, capturing the instance of Activity
or Fragment
instance may cause a memory leak.
Use asReference()
in such cases instead of the direct capturing:
suspend fun getData(): Data { ... }
class MyActivity : Activity() {
fun loadAndShowData() {
// Ref<T> uses the WeakReference under the hood
val ref: Ref<MyActivity> = this.asReference()
async(UI) {
val data = getData()
// Use ref() instead of this@MyActivity
ref().showData()
}
}
fun showData(data: Data) { ... }
}
You can easily execute your code on the background thread using bg()
:
fun getData(): Data { ... }
fun showData(data: Data) { ... }
async(UI) {
val data: Deferred<Data> = bg {
// Runs in background
getData()
}
// This code is executed on the UI thread
showData(data.await())
}