How we add custom toolbar in android studio

 Step 1:

go to drawable folder and right click on drawable folder.

Step 2:

select the drawable resource file from this.

step 3:

Give the name to file and create the file.

step 4:

Toolbar toolbar=findViewById(R.id.toolbar);

XML  file code:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/first"
        android:title="Home"
        app:showAsAction="never" />
    <item android:title="Topics"
        android:id="@+id/second"
        app:showAsAction="never"/>

    <item android:title="Programs"
        android:id="@+id/third"
        app:showAsAction="never"/>
    <item android:title="Practice Program"
        android:id="@+id/fourth"
        app:showAsAction="never"/>
    <item android:title="Quiz"
        android:id="@+id/five"
        app:showAsAction="never"/>
    <item android:title="Privacy policy"
        android:id="@+id/six"
        app:showAsAction="never"/>
    <item android:title="About us"
        android:id="@+id/seven"
        app:showAsAction="never"/>
    <item android:title="Exit"
        android:id="@+id/eigth"
        app:showAsAction="never"/>

</menu>

Java file code:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater() .inflate(R.menu.menu,menu);
    return super.onCreateOptionsMenu(menu);

}
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
    int id=item.getItemId();
    if (id==R.id.first)
    {
        Toast.makeText(this, "Home", Toast.LENGTH_SHORT).show();
    }
    else  if (id==R.id.second)
    {
        Toast.makeText(this, "Topics", Toast.LENGTH_SHORT).show();
    }
    else  if (id==R.id.third)
    {
        Toast.makeText(this, "Programs", Toast.LENGTH_SHORT).show();
    }
    else  if (id==R.id.fourth)
    {
        Toast.makeText(this, "Practics programs", Toast.LENGTH_SHORT).show();
    }
    else  if (id==R.id.five)
    {
        Toast.makeText(this, "Quiz", Toast.LENGTH_SHORT).show();
    }
    else  if (id==R.id.six)
    {
        Toast.makeText(this, "Privacy", Toast.LENGTH_SHORT).show();
    }
    else  if (id==R.id.seven)
    {
        Toast.makeText(this, "About us", Toast.LENGTH_SHORT).show();
    }
    else  if (id==R.id.eigth)
    {
        Toast.makeText(this, "Exit", Toast.LENGTH_SHORT).show();

    }
    return super.onOptionsItemSelected(item);