Comments (2)
In your subscription you should call a method of your view that updates the data. When you rotate the screen, the last result will be given again to the view, without repeating the query or network call or whatever. You don't have to do anything else.
You can use restartable*, a pseudocode example here: #42 (comment)
And a real example (with lambdas):
MyPresenter:
private static final int GET_MY_DATA = 1;
@Override
protected void onCreate(Bundle savedState) {
super.onCreate(savedState);
restartableLatestCache(GET_MY_DATA,
() -> Observable.just(1)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread()),
(view, data) -> {
view.doSomething(data);
}, (view, error) -> {
view.doSomethingOnError(error);
});
start(GET_MY_DATA);
}
Or you can use the deilver* methods, for example:
MyPresenter:
@Override
protected void onCreate(Bundle savedState) {
super.onCreate(savedState);
Observable.just(1)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.compose(deliverLatestCache())
.subscribe(
split((view, data) -> {
view.doSomething(data);
}),
split((view, error) -> {
view.doSomethingOnError(error);
}));
}
I would use the restartable approach. It allows you to start the observable whenever you want, with the start(x) method, so that you can provide some parameters to the query first. Just make sure you are not restarting the observable when a configuration change occurs in order to take advantage of these deliver* methods.
If you use the second approach, don't forget to wrap the observable with the add() method, so that it unsubscribes when the presenter is destroyed.
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@devilmac , did @inorichi anwer your question? You can close the issue if so.
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