MainActivity.java

public class MainActivity extends AppCompatActivity
        implements ClassificationFrameProcessor.ClassificationListener {

    private CameraView cameraView;
    private TextView tvClassification;
    private ClassificationFrameProcessor classificationFrameProcessor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /*...*/
        initClassification();
    }

    private void initClassification() {/*...*/}

    @Override
    public void onClassifiedFrame(List<ClassificationResult> classificationResults) {
        runOnUiThread(() -> tvClassification.setText(ResultsUtils.resultsToStr(classificationResults)));
    }
}