CODEWITHSUNDEEP
androidandroid-studiokotlinandroid-layout
Simone
Simone

Reputation: 435

How can I detect an empty string when I use a SearchView.setOnQueryTextListener

I'm trying to filter a list every time the query text of a SearchView has changed.

svComuni is the name of the SearchView.

This is my code on my main activity:

private fun setUIControl() {
    binding.svComuni.setOnQueryTextListener(textChangeListener())

}

inner class textChangeListener: SearchView.OnQueryTextListener {
    override fun onQueryTextSubmit(p0: String?): Boolean {
        return findAllSimilarCountry(p0)
    }

    override fun onQueryTextChange(p0: String?): Boolean {
        return findAllSimilarCountry(p0)
    }

}

private fun findAllSimilarCountry(p0: String?): Boolean {
    Log.d(TAG, p0!!)
    return true
}

By using this listener I'm able to detect every change in query text of SearchView when I insert some char and when I submit, but not in case I remove the last character. So the empty query text doesn't trigger the listener. How can I include this case?

Upvotes: 0

Views: 617

Answers (1)

Vladislav Kochenkov
Vladislav Kochenkov

Reputation: 41

Do you try to add validation to your listener methods? For example:

 if (p0.equals("")) {
        return false
     } else {
        return findAllSimilarCountry(p0)
     }

Upvotes: 1

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