Using the model in Android to play Connect 4

Not surprisingly, we don't need to use the custom Android library as we did in Chapter 7, Recognizing Drawing with CNN and LSTM, to load the model. Simply create a new Android Studio app with the name AlphaZero, copy the alphazero19.pb model file to the newly created assets folder, and add the compile 'org.tensorflow:tensorflow-android:+' line to the app's build.gradle file as we did before.

We'll first create a new class, BoardView, that extends View and is responsible for drawing the game board and the pieces AI and the user make:

public class BoardView extends View {
    private Path mPathBoard, mPathAIPieces, mPathHumanPieces;
    private Paint mPaint, mCanvasPaint;
    private Canvas mCanvas;
    private Bitmap mBitmap;
    private MainActivity mActivity;

    private static final float MARGINX = 20.0f;
    private static final float MARGINY = 210.0f;
    private float endY;
    private float columnWidth;

    public BoardView(Context context...