Android Studio generating Code128 barcode question

Question

I am trying to execute the Code128 tutorial according to this website: http://www.onbarcode.com/products/android_barcode/barcodes/code_128.html, but I have no idea how to display the barcode.

Here is the Java code:

public class MainActivity extends AppCompatActivity {
private ImageView imageView;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    imageView = findViewById(R.id.imageView2);

    class Test extends View {

        public Test(Context context) {
            super(context);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            Code128 barcode = new Code128();
            barcode.setData("112233445566");     
            barcode.setProcessTilde(false);
            barcode.setUom(IBarcode.UOM_PIXEL);
            barcode.setX(1f);
            barcode.setY(75f);
            barcode.setLeftMargin(10f);
            barcode.setRightMargin(10f);
            barcode.setTopMargin(10f);
            barcode.setBottomMargin(10f);
            barcode.setResolution(72);
            barcode.setShowText(true);
            barcode.setTextFont(new AndroidFont("Arial", Typeface.NORMAL, 12));
            barcode.setTextMargin(6);
            barcode.setTextColor(AndroidColor.black);
            barcode.setForeColor(AndroidColor.black);
            barcode.setBackColor(AndroidColor.white);
            RectF bounds = new RectF(30, 30, 0, 120);

            try {
                barcode.drawBarcode(canvas, bounds);
             //   imageView.setImageBitmap(barcode);
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }
}

What method should I use to display the barcode?

Answer 1

1)Make that inner view class its own separate class in its own file.

2)Give it all 3 required constructors, not just the one.

3)Add that view to your layout somewhere.

That should be enough. Although if you wanted a true BarcodeView class, you obviously would want to add a setBarcode function that takes a Code128 as a parameter, saves it internally, invalidates the view, and have the onDraw use that barcode function.