Get back key event on EditText

Question

How can I handle the event of pressing back key while typing on an EditText? When the virtual keyboard is shown and the user presses back, it gets hidden. I want to handle t

Answer 1

Non of the other answers were working for me in SearchView, I've finally end up with overriding dispatchKeyEventPreIme(...) method in my custom view:

class ImeAwareSearchView @JvmOverloads constructor(
    context: Context?,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : SearchView(context, attrs, defStyleAttr) {

    var onKeyEventPreImeListener: OnKeyEventPreImeListener? = null

    override fun dispatchKeyEventPreIme(event: KeyEvent?): Boolean {
        onKeyEventPreImeListener?.onPreImeKeyEvent()
        return false
    }
}

The listener looks like this:

interface OnKeyEventPreImeListener {

    fun onPreImeKeyEvent()
}

And I'm setting it in Fragment to hide my search row:

search_input.onKeyEventPreImeListener = object: OnKeyEventPreImeListener {
    override fun onPreImeKeyEvent() {
        hideSearchRow()
    }
}

Note that dispatchKeyEventPreIme(...) method is called twice, so make sure you don't do your staff on event twice as well.