How to use

filter

method

in

com.jakewharton.rxbinding2.InitialValueObservable

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();
    }
  });
}

.filter(charSequence -> isNotNullOrEmpty(charSequence.toString()))
.debounce(1000, TimeUnit.MILLISECONDS).map(CharSequence::toString)
.subscribeOn(Schedulers.io())

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