Getting 'The Method SetSupportActionBar(Toolbar) In The Type AppCompatActivity Is Not Applicable For The Arguments (Toolbar)' In My AppCompatActivity

I'm upgrading the UI of a game that I built some time ago and am heading toward Google's Material Design. As part of the code upgrade, I installed the backwards compatibility suppo

Solution 1:

Change:

import android.widget.Toolbar;

to:

import android.support.v7.widget.Toolbar;

in the Java source code that presumably appears above what you have shown in your question. :-)