gradle implementation 'com.jakewharton:butterknife:10.2.0' annotationProcessor 'com.jakewharton:butterknife-compiler:10.2.0' public class MainActivity extends AppCompatActivity { @BindView(R.id.text_view) TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.bind(this); textView.setText("Hello Butterknife!"); } }