How to use com.jakewharton.rxbinding2

@Override
public View onCreateView(
  LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
 View layout = inflater.inflate(R.layout.fragment_form_validation_comb_latest, container, false);
 unbinder = ButterKnife.bind(this, layout);
 _emailChangeObservable =
   RxTextView.textChanges(_email).skip(1).toFlowable(BackpressureStrategy.LATEST);
 _passwordChangeObservable =
   RxTextView.textChanges(_password).skip(1).toFlowable(BackpressureStrategy.LATEST);
 _numberChangeObservable =
   RxTextView.textChanges(_number).skip(1).toFlowable(BackpressureStrategy.LATEST);
 _combineLatestEvents();
 return layout;
}

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
 super.onActivityCreated(savedInstanceState);
 _setupLogger();
 _disposable =
   RxTextView.textChangeEvents(_inputSearchText)
     .debounce(400, TimeUnit.MILLISECONDS) // default Scheduler is Computation
     .filter(changes -> isNotNullOrEmpty(changes.text().toString()))
     .observeOn(AndroidSchedulers.mainThread())
     .subscribeWith(_getSearchObserver());
}

private void setOnQuenyTextChangeListener() {
  RxSearchView.queryTextChangeEvents(searchView)
      .throttleLast(100, TimeUnit.MILLISECONDS)
      .debounce(300, TimeUnit.MILLISECONDS)
      .observeOn(AndroidSchedulers.mainThread())
      .as(this.bindAutoDispose())
      .subscribe(searchViewQueryTextEvent -> {
        final String keyWord = searchViewQueryTextEvent.queryText() + "";
        Log.d(TAG, "accept: " + keyWord);
        if (searchViewQueryTextEvent.isSubmitted()) {
          searchView.clearFocus();
          initSearchLayout(keyWord);

RxView.focusChanges(mEtUsername)
    .compose(bindToLifecycle())
    .subscribe(aBoolean -> {
      if (aBoolean) {
    });
RxView.focusChanges(mEtPassword)
    .compose(bindToLifecycle())
    .subscribe(aBoolean -> {
      if (aBoolean) {
RxTextView.textChangeEvents(mEtUsername)
    .compose(bindToLifecycle())
    .subscribe(textViewTextChangeEvent -> {
      mEtPassword.setText("");
      if (textViewTextChangeEvent.count() > 0) {
        visible(mDeleteUsername);
      } else {
RxView.clicks(mBtnLogin)
    .throttleFirst(5, TimeUnit.SECONDS)//5秒内取第一个事件 防止重复点击发送事件
    .compose(bindToLifecycle())
RxView.clicks(mDeleteUsername)
    .throttleFirst(5, TimeUnit.SECONDS)//5秒内取第一个事件 防止重复
    .compose(bindToLifecycle())

@Override
public void subscribeEditorForPreview(EditText editText) {
  mEditorEditTextDisposable = RxTextView.textChanges(editText)
      .debounce(300, TimeUnit.MILLISECONDS)
      .map(text -> mMarkdownParser.getParsedHtml(text.toString()))
      .subscribeOn(Schedulers.io())
      .observeOn(AndroidSchedulers.mainThread())
      .subscribe(html -> mNoteEditorActivity.loadPreview(html));
}

private Observable<String> getObservableForEditext(EditText editText) {
  return RxTextView.textChanges(editText).filter(new Predicate<CharSequence>() {
    @Override
    public boolean test(@NonNull CharSequence charSequence) throws Exception {
      return charSequence.length() > 3;
    }
  }).debounce(300, TimeUnit.MILLISECONDS).map(new Function<CharSequence, String>() {
    @Override
    public String apply(@NonNull CharSequence charSequence) throws Exception {
      return charSequence.toString();
    }
  });
}

RxTextView.textChangeEvents(mEtRxJava)
    .debounce(INTERVAL, TimeUnit.MILLISECONDS)
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(new Observer<TextViewTextChangeEvent>() {

compositeDisposable.add(RxAdapterView.itemSelections(filterSpinner)
    .skip(2)
    .map(integer -> new FilterEvent(integer == 1))
    .subscribe(

RxTextView.textChanges(binding.msgEt)
    .debounce(200, TimeUnit.MILLISECONDS)
    .subscribe(new Observer<CharSequence>() {
      @Override

Observable<String> obs = RxTextView.textChanges(mSearchEditText).filter(new Predicate<CharSequence>() {
  @Override
  public boolean test(@NonNull CharSequence charSequence) throws Exception {

Observable<CharSequence> nameObservable = RxTextView.textChanges(name).skip(1);
Observable<CharSequence> ageObservable = RxTextView.textChanges(age).skip(1);
Observable<CharSequence> jobObservable = RxTextView.textChanges(job).skip(1);

@SuppressLint("CheckResult")
private void initSearchView() {
  RxSearchView.queryTextChangeEvents(mSearchView)
      .throttleLast(100, TimeUnit.MILLISECONDS)
      .debounce(300, TimeUnit.MILLISECONDS)
      .observeOn(AndroidSchedulers.mainThread())
      .subscribe(searchViewQueryTextEvent -> {
        String keyWord = searchViewQueryTextEvent.queryText().toString();
        if (searchViewQueryTextEvent.isSubmitted()) {
          mSearchView.clearFocus();

RxTextView.textChanges(ed)
    .debounce(1, TimeUnit.SECONDS).skip(1)
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe(new Observer<CharSequence>() {

RxTextView.textChanges(searchView.getRootView().findViewById(R.id.searchTextView))
    .filter(charSequence -> isNotNullOrEmpty(charSequence.toString()))
    .debounce(1000, TimeUnit.MILLISECONDS).map(CharSequence::toString)
    .subscribeOn(Schedulers.io())