Clicking hamburger icon on Toolbar does not open Navigation Drawer

Question

I have a simple android.support.v7.widget.Toolbar and all I am trying to do is to open a NavigationDrawer by pressing the \"hamburger\" icon in the top left cor

Answer 1

After a lot of different problems I found a way to make it work putting Toolbar Widget inside AppBarLayout.

Be sure that there is no other layout on top of widget toolbar!

    

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        .... YOUR LAYOUT ...