Android SearchView onQueryTextChange doesn't work with ObservableOnSubscribe - kotlin

Question

I've got such code for searching streams by their name.
compositeDisposable.add(Observable.create(ObservableOnSubscribe<String> { subscriber ->
binding.searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
override fun onQueryTextChange(newText: String?): Boolean {
subscriber.onNext(newText!!)
return false
}
override fun onQueryTextSubmit(query: String?): Boolean {
subscriber.onNext(query!!)
return false
}
})
})
.debounce(250, TimeUnit.MILLISECONDS)
.distinct()
.subscribe { text ->
val pagerPos = binding.streamsPager.currentItem
val currentFragment =
activity?.supportFragmentManager?.findFragmentByTag("f${pagerAdapter.getItemId(pagerPos)}")
(currentFragment as StreamFragment).onSearchHolder.onSearch(text)
}
)
It works fine with onQueryTextSubmit, but ignores setOnQueryTextListener. So when I want to erase symbols and "reset" search I get nothing
How to fix this?

Answer 1

use a wrapper class for your ObservableOnSubscribe and sealed class for your search events. Like this:
class SearchViewWrapper(private val searchView: SearchView) : ObservableOnSubscribe<SearchViewEvent> {
override fun subscribe(emitter: ObservableEmitter<SearchViewEvent>) {
searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
override fun onQueryTextSubmit(query: String?): Boolean {
emitter.onNext(SearchViewEvent.onQueryTextSumbit(query))
return true
}
override fun onQueryTextChange(newText: String?): Boolean {
emitter.onNext(SearchViewEvent.onQueryChanged(newText))
return true
}
})
}
}
Sealed class for events:
sealed class SearchViewEvent {
data class onQueryChanged(val text: String?): SearchViewEvent()
data class onQueryTextSumbit(val query: String?): SearchViewEvent()
}
Try to use it where you need(just example):
fun useIt(searchView: SearchView) {
Observable.create(SearchViewWrapper(searchView))
.subscribe(::handleSearchViewEvent)
.addTo(yourCompositeDisposable)
}
private fun handleSearchViewEvent(event: SearchViewEvent) {
when (event) {
is SearchViewEvent.onQueryChanged -> TODO()
is SearchViewEvent.onQueryTextSumbit -> TODO()
}
}