Hide the view binding using ButterKnife and Abstraction.

BaseActivity.java

/**
 * Created by Saurabh(aqua) on 21-03-2017.
 */

public abstract class BaseActivity extends AppCompatActivity implements LifecycleRegistryOwner {

    private LifecycleRegistry lifecycleRegistry = new LifecycleRegistry(this);
    private Unbinder unbinder;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(getActivityLayout());
        unbinder = ButterKnife.bind(this);
    }

    @Override
    public LifecycleRegistry getLifecycle() {
        return lifecycleRegistry;
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unbinder.unbind();
    }

    protected abstract int getActivityLayout();
}

TestActivity.java

/**
 * Created by Saurabh(aqua) in 2017.
 */

public class TestActivity extends BaseActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    protected int getActivityLayout() {
        return R.layout.ac_test;
    }
}