Error setting Toolbar as ActionBar

Question

I'm trying to replace the ActionBar of my app with a Toolbar but I can't because I can't use setSupportActionBar(). It says "setSupportActionBar() is undefined for the type MainActivity" even if MainActivity extends ActionBarActivity. I don't know what to do, any help? Do you need me to post my code?

EDIT: Now the code works but my app crashes on start and it says: "Attempt to invoke virtual method getTitle()". What do I miss?

EDIT2: Everything works I forgot I had a Fragment and because of that it gave me nullPointer

Solution 1

Without code, my only recommendation, is making sure your import statement is as follows:

import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;

Also make sure in your XML files that you are using

<android.support.v7.widget.Toolbar

As your toolbar tag

Solution 2

Now use :

import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
setSupportActionBar(toolbar);

XML :

android.support.v7.widget.Toolbar

Extends :

public class MainActivity extends AppCompatActivity

Comments

[MattButtMatt]

The only thing I'm missing is import android.support.v7.widget.Toolbar; because I have import android.widget.Toolbar; If I try to add it, it says "The import android.support.v7.widget.Toolbar; cannot be resolved". I don't know why, I use the appcompat_v7 library.

[jyomin]

@BlueMango do you find the solution of your problrm why it is not importing import android.support.v7.widget.Toolbar;?

[Rethinavel]

@BlueMango. I am facing the same issue.. Could you please share how you did that?

[raddevus]

This is actually the complete and definitive answer, because you show the extends AppCompatActivity. Thanks

[CEO tech4lifeapps]

The question was asked more than 6 years ago. It would be interesting to know if your suggestion using androidx works.