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如何实现 RxJava 的链式调用--异步中的异步 flatMap
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public interface Api{ | |
void queryPhoto(String query,QueryCallback QueryCallback); | |
void store(Photo photo,StoreCallback storeCallback); | |
interface QueryCallback{ | |
void onQuerySuccess(List<Photo> photoList); | |
void onQueryFailed(Exception e); | |
} | |
interface StoreCallback{ | |
void onCatStored(Uri uri); | |
void onStoredFailed(Exception e); | |
} | |
} |
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RxJob<List<Photo>> queryPhotoJob = new RxJob<List<Photo>>(){ | |
@Override | |
public void doJob(final RxCallback<List<Photo>> rxCallback) { | |
mApi.queryPhoto("flyer", new Api.QueryCallback() { | |
@Override | |
public void onQuerySuccess(List<Photo> photoList) { | |
rxCallback.onNext(photoList); | |
} | |
@Override | |
public void onQueryFailed(Exception e) { | |
rxCallback.onError(e); | |
} | |
}); | |
} | |
}; | |
}; | |
RxJob<List<Photo>> storePhotoJob = new RxJob<Uri>() { | |
@Override | |
public void doJob(RxCallback<Uri> rxCallback) { | |
mApi.store(photo, new Api.StoreCallback() { | |
@Override | |
public void onCatStored(Uri uri) { | |
rxCallback.onNext(uri); | |
} | |
@Override | |
public void onStoredFailed(Exception e) { | |
rxCallback.onError(e); | |
} | |
}); | |
} | |
}; | |
queryPhotoJob.map(photoList -> { return getBestPhoto(photoList);}) | |
.flatMap(photo -> { return storePhotoJob;} ) | |
.map(photo -> {return photo.getUrl();}) | |
.doJob(new RxCallback<String>() { | |
@Override | |
public void onNext(String s) { | |
ToastUtils.show(s); | |
} | |
@Override | |
public void onError(Exception e) { | |
ToastUtils.show(e); | |
} | |
}); |
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public abstract class RxJob<T>{ | |
public abstract void doJob(RxCallback<T> rxCallback){} | |
public RxJob map(){ | |
final RxJob<T> curJob = this; | |
return new RxJob<R>() { | |
@Override | |
public void doJob(final RxCallback<R> rxCallback) { | |
curJob.doJob(new RxCallback<T>() { | |
@Override | |
public void onNext(T t) { | |
R mapped = func.call(t); | |
rxCallback.onNext(mapped); | |
} | |
@Override | |
public void onError(Exception e) { | |
rxCallback.onError(e); | |
} | |
}); | |
} | |
}; | |
} | |
public RxJob flatMap(){...}; | |
} |
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