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Using Fast Android Networking Library With RxJava
AMIT SHEKHAR edited this page Aug 3, 2016
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Using Fast Android Networking Library with RxJava
Add this in your build.gradle
compile 'com.amitshekhar.android:rx-android-networking:0.1.0'Then initialize it in onCreate() Method of application class :
AndroidNetworking.initialize(getApplicationContext()); /*
* Here we are getting ApiUser Object from api server
* then we are converting it into User Object because
* may be our database support User Not ApiUser Object
* Here we are using Map Operator to do that
*/
RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAnUser/{userId}")
.addPathParameter("userId", "1")
.build()
.getParseObservable(new TypeToken<ApiUser>() {
})
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.map(new Func1<ApiUser, User>() { // takes ApiUser and returns User
@Override
public User call(ApiUser apiUser) {
// here we get ApiUser from server
User user = new User(apiUser);
// then by converting, we are returing user
return user;
}
})
.subscribe(new Observer<User>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(User user) {
// do anything with user
}
}); /*
* Here we are making two network calls
* One returns the list of cricket fans
* Another one returns the list of football fans
* Then we are finding the list of users who loves both
*/
/*
* This observable return the list of User who loves cricket
*/
private Observable<List<User>> getCricketFansObservable() {
return RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllCricketFans")
.build()
.getParseObservable(new TypeToken<List<User>>() {
});
}
/*
* This observable return the list of User who loves Football
*/
private Observable<List<User>> getFootballFansObservable() {
return RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllFootballFans")
.build()
.getParseObservable(new TypeToken<List<User>>() {
});
}
/*
* This do the complete magic, make both network call
* and then returns the list of user who loves both
* Using zip operator to get both response at a time
*/
private void findUsersWhoLovesBoth() {
// here we are using zip operator to combine both request
Observable.zip(getCricketFansObservable(), getFootballFansObservable(),
new Func2<List<User>, List<User>, List<User>>() {
@Override
public List<User> call(List<User> cricketFans,
List<User> footballFans) {
List<User> userWhoLovesBoth =
filterUserWhoLovesBoth(cricketFans, footballFans);
return userWhoLovesBoth;
}
}
).subscribeOn(Schedulers.newThread())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<List<User>>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(List<User> users) {
// do anything with user who loves both
}
});
}
private List<User> filterUserWhoLovesBoth(List<User> cricketFans, List<User> footballFans) {
List<User> userWhoLovesBoth = new ArrayList<>();
// your logic to filter who loves both
return userWhoLovesBoth;
} /*
* First of all we are getting my friends list from
* server, then by using flatMap we are emitting users
* one by one and then after applying filter we are
* returning only those who are following me one by one.
*/
/*
* This observable return the list of User who are my friends
*/
private Observable<List<User>> getAllMyFriendsObservable() {
return RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllFriends/{userId}")
.addPathParameter("userId", "1")
.build()
.getParseObservable(new TypeToken<List<User>>() {
});
}
/*
* This method does all
*/
public void flatMapAndFilter() {
getAllMyFriendsObservable()
.flatMap(new Func1<List<User>, Observable<User>>() { // flatMap - to return users one by one
@Override
public Observable<User> call(List<User> usersList) {
return Observable.from(usersList); // returning(emitting) user one by one from usersList.
}
})
.filter(new Func1<User, Boolean>() { // filter operator
@Override
public Boolean call(User user) {
// filtering user who follows me.
return user.isFollowing;
}
})
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<User>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(User user) {
// only the user who is following me comes here one by one
}
});
} /* Here first of all, we get the list of users from server.
* Then using using take operator, it only emits
* required number of users.
*/
/*
* This observable return the list of users.
*/
private Observable<List<User>> getUserListObservable() {
return RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllUsers/{pageNumber}")
.addPathParameter("pageNumber", "0")
.addQueryParameter("limit", "10")
.build()
.getParseObservable(new TypeToken<List<User>>() {});
}
getUserListObservable()
.flatMap(new Func1<List<User>, Observable<User>>() { // flatMap - to return users one by one
@Override
public Observable<User> call(List<User> usersList) {
return Observable.from(usersList); // returning user one by one from usersList.
}
})
.take(4) // it will only emit first 4 users out of all
.subscribeOn(Schedulers.newThread())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<User>() {
@Override
public void onCompleted() {
// do something onCompletion
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(User user) {
// only four user comes here one by one
}
}); /* Here first of all, we get the list of users from server.
* Then for each userId from user, it makes the network call to get the detail
* of that user.
* Finally, we get the userDetail for the corresponding user one by one
*/
/*
* This observable return the list of users.
*/
private Observable<List<User>> getUserListObservable() {
return RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllUsers/{pageNumber}")
.addPathParameter("pageNumber", "0")
.addQueryParameter("limit", "10")
.build()
.getParseObservable(new TypeToken<List<User>>() {});
}
/*
* This observable return the userDetail corresponding to the user.
*/
private Observable<UserDetail> getUserDetailObservable(long userId) {
return RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAnUserDetail/{userId}")
.addPathParameter("userId", String.valueOf(userId))
.build()
.getParseObservable(new TypeToken<UserDetail>() {});
}
/*
* This method do the magic - first gets the list of users
* from server.Then, for each user, it makes the network call to get the detail
* of that user.
* Finally, we get the UserDetail for the corresponding user one by one
*/
public void flatMap() {
getUserListObservable()
.flatMap(new Func1<List<User>, Observable<User>>() { // flatMap - to return users one by one
@Override
public Observable<User> call(List<User> usersList) {
return Observable.from(usersList); // returning user one by one from usersList.
}
})
.flatMap(new Func1<User, Observable<UserDetail>>() {
@Override
public Observable<UserDetail> call(User user) {
// here we get the user one by one
// and returns corresponding getUserDetailObservable
// for that userId
return getUserDetailObservable(user.id);
}
})
.subscribeOn(Schedulers.newThread())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<UserDetail>() {
@Override
public void onCompleted() {
// do something onCompleted
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(UserDetail userDetail) {
// here we get userDetail one by one for all users
Log.d(TAG, "userDetail id : " + userDetail.id);
Log.d(TAG, "userDetail firstname : " + userDetail.firstname);
Log.d(TAG, "userDetail lastname : " + userDetail.lastname);
}
});
} /* Very Similar to above example, only change is
* that, here we are using zip after flatMap to
* combine(pair) User and UserDetail
*/
/*
* This method do the magic - first gets the list of users
* from server.Then, for each user, it makes the network call to get the detail
* of that user.
* Finally, we get the UserDetail for the corresponding user one by one
*/
private void flatMapWithZip() {
getUserListObservable()
.flatMap(new Func1<List<User>, Observable<User>>() { // flatMap - to return users one by one
@Override
public Observable<User> call(List<User> usersList) {
return Observable.from(usersList); // returning user one by one from usersList.
}
})
.flatMap(new Func1<User, Observable<Pair<UserDetail, User>>>() {
@Override
public Observable<Pair<UserDetail, User>> call(User user) {
// here we get the user one by one and then we are zipping
// two observable - one getUserDetailObservable (network call to get userDetail)
// and another Observable.just(user) - just to emit user
return Observable.zip(getUserDetailObservable(user.id), // zip to combine two observable
Observable.just(user),
new Func2<UserDetail, User, Pair<UserDetail, User>>() {
@Override
public Pair<UserDetail, User> call(UserDetail userDetail, User user) {
// runs when network call completes
// we get here userDetail for the corresponding user
return new Pair<>(userDetail, user); // returning the pair(userDetail, user)
}
});
}
})
.subscribeOn(Schedulers.newThread())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<Pair<UserDetail, User>>() {
@Override
public void onCompleted() {
// do something onCompleted
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(Pair<UserDetail, User> pair) {
// here we are getting the userDetail for the corresponding user one by one
UserDetail userDetail = pair.first;
User user = pair.second;
Log.d(TAG, "userId : " + user.id);
Log.d(TAG, "userDetail firstname : " + userDetail.firstname);
Log.d(TAG, "userDetail lastname : " + userDetail.lastname);
}
});
}public class SubscriptionActivity extends Activity {
private static final String TAG = SubscriptionActivity.class.getSimpleName();
private static final String URL = "http://i.imgur.com/AtbX9iX.png";
private String dirPath;
private String fileName = "imgurimage.png";
Subscription subscription;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
dirPath = Utils.getRootDirPath(getApplicationContext());
subscription = getObservable()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(getObserver());
}
@Override
protected void onDestroy() {
super.onDestroy();
if (subscription != null) {
// unsubscribe it when activity onDestroy is called
subscription.unsubscribe();
}
}
public Observable<String> getObservable() {
return RxAndroidNetworking.download(URL, dirPath, fileName)
.build()
.getDownloadObservable();
}
private Observer<String> getObserver() {
return new Observer<String>() {
@Override
public void onCompleted() {
Log.d(TAG, "onCompleted");
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError " + e.getMessage());
}
@Override
public void onNext(String response) {
Log.d(TAG, "onResponse response : " + response);
}
};
}
}RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllUsers/{pageNumber}")
.addPathParameter("pageNumber", "0")
.addQueryParameter("limit", "3")
.build()
.getJSONArrayObservable()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<JSONArray>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(JSONArray response) {
//do anything with response
}
});RxAndroidNetworking.post("https://fierce-cove-29863.herokuapp.com/createAnUser")
.addBodyParameter("firstname", "Amit")
.addBodyParameter("lastname", "Shekhar")
.build()
.getJSONObjectObservable()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<JSONObject>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(JSONObject response) {
//do anything with response
}
});RxAndroidNetworking.download("http://i.imgur.com/AtbX9iX.png",dirPath,imgurimage.png)
.build()
.setDownloadProgressListener(new DownloadProgressListener() {
@Override
public void onProgress(long bytesDownloaded, long totalBytes) {
// do anything with progress
}
})
.getDownloadObservable()
.subscribeOn(Schedulers.io()
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<String>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(String response) {
//gives response = "success"
}
});RxAndroidNetworking.upload("https://fierce-cove-29863.herokuapp.com/uploadImage")
.addMultipartFile("image", new File(imageFilePath))
.build()
.setUploadProgressListener(new UploadProgressListener() {
@Override
public void onProgress(long bytesUploaded, long totalBytes) {
// do anything with progress
}
})
.getJSONObjectObservable()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<JSONObject>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(JSONObject response) {
//do anything with response
}
});/*--------------Example One -> Getting the userList----------------*/
RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAllUsers/{pageNumber}")
.addPathParameter("pageNumber", "0")
.addQueryParameter("limit", "3")
.build()
.getParseObservable(new TypeToken<List<User>>() {})
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<List<User>>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(List<User> users) {
// do anything with response
Log.d(TAG, "userList size : " + users.size());
for (User user : users) {
Log.d(TAG, "id : " + user.id);
Log.d(TAG, "firstname : " + user.firstname);
Log.d(TAG, "lastname : " + user.lastname);
}
}
});
/*--------------Example Two -> Getting an user----------------*/
RxAndroidNetworking.get("https://fierce-cove-29863.herokuapp.com/getAnUser/{userId}")
.addPathParameter("userId", "1")
.build()
.getParseObservable(new TypeToken<User>() {})
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<User>() {
@Override
public void onCompleted() {
// do anything onComplete
}
@Override
public void onError(Throwable e) {
// handle error
}
@Override
public void onNext(User user) {
// do anything with response
Log.d(TAG, "id : " + user.id);
Log.d(TAG, "firstname : " + user.firstname);
Log.d(TAG, "lastname : " + user.lastname);
}
});
/*-- Note : TypeToken and getParseObservable is important here --*/ public void onError(Throwable e) {
if (e instanceof ANError) {
ANError anError = (ANError) e;
if (anError.getErrorCode() != 0) {
// received ANError from server
// error.getErrorCode() - the ANError code from server
// error.getErrorBody() - the ANError body from server
// error.getErrorDetail() - just a ANError detail
Log.d(TAG, "onError errorCode : " + anError.getErrorCode());
Log.d(TAG, "onError errorBody : " + anError.getErrorBody());
Log.d(TAG, "onError errorDetail : " + anError.getErrorDetail());
} else {
// error.getErrorDetail() : connectionError, parseError, requestCancelledError
Log.d(TAG, "onError errorDetail : " + anError.getErrorDetail());
}
} else {
Log.d(TAG, "onError errorMessage : " + e.getMessage());
}
}