Herança

BaseActivity.java

public class BaseActivity extends AppCompatActivity {

    public void setupViews(Toolbar toolbar, String title) {
        setTitle(title);
        setSupportActionBar(toolbar);
        try {
            getSupportActionBar().setElevation(0);
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setHomeButtonEnabled(true);
            getSupportActionBar().setDisplayShowTitleEnabled(false);
            final Drawable upArrow = getResources().getDrawable(R.drawable.ic_back);
            upArrow.setColorFilter(getResources().getColor(R.color.colorPrimary), PorterDuff.Mode.SRC_ATOP);
            getSupportActionBar().setHomeAsUpIndicator(upArrow);
        } catch (Exception e) {
            e.printStackTrace();
        }
   }
}

TermsActivity.java

public class TermsActivity extends BaseActivity {

    @BindView(R2.id.toolbar)
    Toolbar toolbar;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_terms);
        ButterKnife.bind(this);
        super.setupViews(toolbar, "diretrizes");
    }
}