How to resolve the Android error "method setSupportActionBar in class AppCompatActivity cannot be applied to given types"?

Question

I'm making an Android app using appcompat using com.android.support:appcompat-v7:23.0.3 and getting following error.

Error:(22, 9) error: method setSupportActionBar in class AppCompatActivity cannot be applied to given types; required: android.support.v7.widget.Toolbar found: android.widget.Toolbar reason: actual argument android.widget.Toolbar cannot be converted to android.support.v7.widget.Toolbar by method invocation conversion

Answer 1

First of all appcompat 23.0.3 doesn't exist.

Use 23.0.1

com.android.support:appcompat-v7:23.0.1

Then the method setSupportActionBar works with android.support.v7.widget.Toolbar.

Check the import in your code.
When you are using the Toolbar,you have to use the right import:

import android.support.v7.widget.Toolbar;

Finally also in your layout, you have to use the right widget.

<android.support.v7.widget.Toolbar
    ..... />