MenuItemCompat.getActionView always returns null

Finally I found the solution.

  1. Changing namespace of actionViewClass from android:actionViewClass to app:actionViewClass

  2. Implementing android.support.v7.widget.SearchView.OnQueryTextListener interface for current activity.

  3. Directly use setOnQueryTextListener instead of SearchViewCompat.setOnQueryTextListener

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
      MenuInflater inflater = getMenuInflater();
      inflater.inflate(R.menu.menu, menu);
    
      MenuItem searchItem = menu.findItem(R.id.action_search);
      SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
      if (searchView != null) {
         searchView.setOnQueryTextListener(this);
      }
    
      return super.onCreateOptionsMenu(menu);
    }
    

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