We already know how to handle slow I/O operations. Let's see an example of a long, slow task that is not I/O-bound. For this example, we will modify our loadList() function and create a new slow function that will emit our installed apps' items:
private Observable<AppInfo> getObservableApps(List<AppInfo> apps) {
return Observable
.create(subscriber -> {
for (double i = 0; i < 1000000000; i++) {
double y = i * i;
}
for (AppInfo app : apps) {
subscriber.onNext(app);
}
subscriber.onCompleted();
});
}As you can see, this function performs a few nonsensical computations, only to waste time for the sake of our example, and then it emits our AppInfo items from the List<AppInfo> object. Now, we can rearrange our loadList() function like this:
private void loadList(List<AppInfo> apps) {
mRecyclerView.setVisibility...