我想在Android应用程序中实现场所自动完成功能,为此我使用了Retrofit和RxJava。我想在用户输入内容后每2秒做一次响应。我试图使用debounce运算符,但它不起作用。它立即给我结果,没有任何停顿。
mAutocompleteSearchApi.get(input, "(cities)", API_KEY)
.debounce(2, TimeUnit.SECONDS)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.flatMap(prediction -> Observable.fromIterable(prediction.getPredictions()))
.subscribe(prediction -> {
Log.e(TAG, "rxAutocomplete : " + prediction.getStructuredFormatting().getMainText());
});
答案 0 :(得分:8)
正如@BenP在评论中所说,您似乎正在将debounce
应用于Place Autocomplete服务。此调用将返回一个Observable,它在完成之前发出单个结果(或错误),此时debounce
运算符将发出该唯一的项目。
您可能想要做的是用以下内容去除用户输入:
// Subject holding the most recent user input
BehaviorSubject<String> userInputSubject = BehaviorSubject.create();
// Handler that is notified when the user changes input
public void onTextChanged(String text) {
userInputSubject.onNext(text);
}
// Subscription to monitor changes to user input, calling API at most every
// two seconds. (Remember to unsubscribe this subscription!)
userInputSubject
.debounce(2, TimeUnit.SECONDS)
.flatMap(input -> mAutocompleteSearchApi.get(input, "(cities)", API_KEY))
.flatMap(prediction -> Observable.fromIterable(prediction.getPredictions()))
.subscribe(prediction -> {
Log.e(TAG, "rxAutocomplete : " + prediction.getStructuredFormatting().getMainText());
});