Why do I get: null cannot be cast to non-null type android.widget.SearchView ?

Question

I am trying to implement the "search widget" on my Menu Bar.. But I am getting the error: "null cannot be cast to non-null type android.widget.SearchView".. I did sme attempts to solve the problem, but no result..

Could you give me some hints?

minSdkVersion 17 targetSdkVersion 26

override fun onCreateOptionsMenu(menu: Menu?): Boolean {

        menuInflater.inflate(R.menu.menu, menu)

        val searchView = menu!!.findItem(R.id.app_bar_search).actionView as SearchView
        val searchManager = getSystemService(Context.SEARCH_SERVICE) as SearchManager
        searchView.setSearchableInfo(searchManager.getSearchableInfo(componentName))
        searchView.setOnQueryTextListener(object: SearchView.OnQueryTextListener{
            override fun onQueryTextSubmit(p0: String?): Boolean {
                return false
            }

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

        })

<item
        android:id="@+id/app_bar_search"
        android:actionViewClass="android.widget.SearchView"
        android:icon="@drawable/ic_search_black_24dp"
        android:title="Search"
        app:showAsAction="always"/>

I guess `findItem` may return null item. – egoldx Sep 01 '17 at 14:28 — egoldx, Sep 01 '17 at 14:28

score 12 · Accepted Answer · answered Sep 01 '17 at 14:33

12

Try replacing

android:actionViewClass="android.widget.SearchView"

with

app:actionViewClass="android.widget.SearchView"

answered Sep 01 '17 at 14:33

Brian Yencho

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Why do I get: null cannot be cast to non-null type android.widget.SearchView ?

1 Answers1