How to remove all listeners added with addTextChangedListener

Question

I have a ListView where each row has an EditText control. I want to add a TextChangedListener to each row; one that contains extra dat

Answer 1

If one, like me, deals with ViewHolder, then simply saving a reference to a text watcher upon its creation will not help. Upon reuse the view will get to some other ViewHolder which would not have a reference to that old text watcher, thus one won't be able to delete it.

Personally i chose to solve problem like @inazaruk, though updated code to Kotlin + renamed class to better reflect it's purpose.

class EditTextWithRemovableTextWatchers(context: Context?, attrs: AttributeSet?) : TextInputEditText(context, attrs) {

    private val listeners by lazy { mutableListOf() }

    override fun addTextChangedListener(watcher: TextWatcher) {
        listeners.add(watcher)
        super.addTextChangedListener(watcher)
    }

    override fun removeTextChangedListener(watcher: TextWatcher) {
        listeners.remove(watcher)
        super.removeTextChangedListener(watcher)
    }

    fun clearTextChangedListeners() {
        for (watcher in listeners) super.removeTextChangedListener(watcher)
        listeners.clear()
    }
}