...
public class MainActivity extends AppCompatActivity {

    ...
    private TensorFlowInferenceInterface mInferenceInterface;

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

        mInferenceInterface = new TensorFlowInferenceInterface(getAssets(), "file:///android_asset/optimized_tfdroid.pb");

        ...
        float[] inputFloats = {1, 1, 1};
        mInferenceInterface.feed("I", inputFloats, 1, 3);
        mInferenceInterface.run(new String[]{"O"});
        float[] resu = {0, 0};
        mInferenceInterface.fetch("O", resu);
        ...
    }
    ...
}