RxTextView.textChanges与EditText上的setText

  • Z时代
  • 2024-01-10
  • 分类：问答

RxTextView.textChanges(editText)
                .map(CharSequence::toString)
                .debounce(200, TimeUnit.MILLISECONDS)
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(input -> {
                   output = //...do something with input
                   editText.setText(ouput)
                 }));

当我setText(output)循环时。要设置文本，我首先需要删除监听器，然后再次设置监听器。如何使用 RxJava 做到这 一点 ？

回答：

当我setText(output)循环时。要设置文本，我首先需要删除监听器，然后再次设置监听器。如何使用 RxJava 做到这 一点 ？

为了满足要求，我设法如下扩展RxBinding源代码。

：

public class EditableTextViewTextObservable extends InitialValueObservable<CharSequence> {
    private final TextView view;
    EditableTextViewTextObservable(TextView view) {
        this.view = view;
    }
    @Override
    protected void subscribeListener(Observer<? super CharSequence> observer) {
        EditableTextViewTextObservable.Listener listener = new EditableTextViewTextObservable.Listener(view, observer);
        observer.onSubscribe(listener);
        view.addTextChangedListener(listener);
    }
    @Override protected CharSequence getInitialValue() {
        return view.getText();
    }
    final static class Listener extends MainThreadDisposable implements TextWatcher {
        private final TextView view;
        private final Observer<? super CharSequence> observer;
        Listener(TextView view, Observer<? super CharSequence> observer) {
            this.view = view;
            this.observer = observer;
        }
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        }
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
        }
        @Override
        public void afterTextChanged(Editable s) {
            if (!isDisposed()) {
                view.removeTextChangedListener(this);
                observer.onNext(s);
                view.addTextChangedListener(this);
            }
        }
        @Override
        protected void onDispose() {
            view.removeTextChangedListener(this);
        }
    }
}

：

public final class EditableRxTextView {
    @CheckResult
    @NonNull
    public static InitialValueObservable<CharSequence> textChanges(@NonNull TextView view) {
        return new EditableTextViewTextObservable(view);
    }
}

：

EditableRxTextView.textChanges(editText)
            .map(CharSequence::toString)
            .debounce(200, TimeUnit.MILLISECONDS)
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(input -> {
               output = //...do something with input
               editText.setText(ouput)
             }));

以上是 RxTextView.textChanges与EditText上的setText 的全部内容， 来源链接： utcz.com/qa/410892.html

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