Adding custom view to a toolbar

Works great for me.

LayoutInflater mInflater=LayoutInflater.from(context);
View mCustomView = mInflater.inflate(R.layout.toolbar_custom_view, null);
toolbar.addView(mCustomView);

Just inflate the view that you want to add passing the toolbar view as second parameter of the inflate method; In this way the call to "addView" is not necessary:

setSupportActionBar(toolbar);
View logo = getLayoutInflater().inflate(R.layout.view_logo, toolbar);

With toolbar I've managed to achieve that like this:

setSupportActionBar(toolbar);
View logo = getLayoutInflater().inflate(R.layout.view_logo, null);
toolbar.addView(logo);

Or you can also just add your view to the toolbar xml, as it's just a ViewGroup. This way you'll have the preview in layout editor. No java code required.