-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathMainActivity.java
More file actions
116 lines (101 loc) · 3.91 KB
/
MainActivity.java
File metadata and controls
116 lines (101 loc) · 3.91 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
startWorkAndSubscribeWithOperators();
}
//OPERATORS----------------------------------------
private void startWorkAndSubscribeWithOperators() {
Observable<String> observable = createObservable();
Observer<Object> observer = createObserver();
observable
.observeOn(Schedulers.io())
.subscribeOn(AndroidSchedulers.mainThread())
.filter(new Predicate<String>() { //emit only some elements
@Override
public boolean test(String s) throws Exception {
return s.toLowerCase().startsWith("c");
}
})
.map(new Function<String, Object>() { //modify data
@Override
public Object apply(String s) {
return s.toUpperCase();
}
})
.subscribe(observer);
}
//SCHEDULERS--------------------------
private void startWorkAndSubscribe() {
//create Observable and Observer
Observable<String> observable = createObservable();
Observer<String> observer = createObserver();
//subscribe on choosen schedulers
observable
.observeOn(Schedulers.io()) //emit data on background thread
.subscribeOn(AndroidSchedulers.mainThread()) //receive data on UI thread
.subscribe(observer); //subscribe observer to observable
}
//OBSERVER---------------------------------
private Observer<String> createObserver() {
Observer<String> observer = new Observer<String>() {
@Override
public void onSubscribe(Disposable d) {
//Observer subscribe to Observable
}
@Override
public void onNext(String s) {
//Observer received some data stream
}
@Override
public void onError(Throwable e) {
//Observer received emitted error
}
@Override
public void onComplete() {
//Observer completed receiving data from Observable
}
};
return observer;
}
//OBSERVABLE--------------------------------------
private Observable<String> createObservableJust() {
//up to 10 items
Observable<String> observable = Observable.just("Catan", "Splendor", "7 Wonders", "Codenames", "Taboo");
return observable;
}
private Observable<String> createObservableFrom() {
//create Observable by one of: fromArray, fromCallable, fromFuture, fromIterable, fromPublisher
Observable<String> observable = Observable.fromArray("Catan", "Splendor", "7 Wonders", "Codenames", "Taboo");
return observable;
}
private Observable<String> createObservable() {
final List<String> data = prepareData();
Observable<String> observable = Observable.create(new ObservableOnSubscribe<String>() {
@Override
public void subscribe(ObservableEmitter<String> emitter) throws Exception {
//emit all data one by one
for(String item : data) {
if(!emitter.isDisposed()) {
emitter.onNext(item);
}
}
//emit completed event
if(!emitter.isDisposed()) {
emitter.onComplete();
}
}
});
return observable;
}
private List<String> prepareData() {
List<String> data = new ArrayList<>();
data.add("Catan");
data.add("Splendor");
data.add("7 Wonders");
data.add("Codenames");
data.add("Taboo");
return data;
}
}