**I am new**, and I have almost 0 experience with Android Studio, so **I need somebody who uses simple words, to help me understand better**. 

I have some problems following the second episode of the video-tutorials on YouTube by RedCode Development to code a Soundboard in Android Studio.

[If you click here, you can see](https://youtu.be/6xuq_Z16STk?list=PLj2QEgPXNW-TLqpCHFXPQ77s8PDmFTRZq&t=582) that he (the author of the video-tutorial) writes the following code:

```
    android:id="@id/soundboard_toolbar"/>

```

> 
> **Edit**: the line code above is wrong, write this one to make it right:
> 
> 
> 

```
    android:id="@+id/soundboard_toolbar"/>

```

[That's the 1st error I get](https://i.stack.imgur.com/t577v.png) (*@id/soundboard\_toolbar* is marked as an *error* in red in my Editor) and I thought that the problem was going to be solved defining *soundboard\_toolbar*, or writing additional code.

Then, [we go to minute 11:15](https://youtu.be/6xuq_Z16STk?list=PLj2QEgPXNW-TLqpCHFXPQ77s8PDmFTRZq&t=615) and we can see he writes the code:

```
toolbar Toolbar;       

```

> 
> **Edit**: the line code above is wrong, write this one to make it right:
> 
> 
> 

```
Toolbar toolbar;

```

Followed by the code:

```
toolbar = (Toolbar) findViewById(R.id.soundboard_toolbar);
setSupportActionBar(toolbar);

```

Wherever [*toolbar* is written, it gives me an error](https://i.stack.imgur.com/7XLUv.png).

If you look at the comments [you can see there is somebody with a similar problem](https://i.stack.imgur.com/gaj7g.png).

How to solve the errors?