Question

I have a class Panel which overrides onDraw() method as below.I have two images mentioned in canvas.drawBitmap(),as of now their position is fixed. Is it possible for me to move these two images from bottom to top on my emulator? Code is:

class Panel extends View {
    public Panel(Context context) {
        super(context);
    }

    @Override
    public void onDraw(Canvas canvas) {
        Bitmap image1 = BitmapFactory.decodeResource(getResources(), R.drawable.btnpre);
        canvas.drawColor(Color.CYAN);
        canvas.drawBitmap(Image1, 10, 10, null);
        Bitmap Image2 = BitmapFactory.decodeResource(getResources(), R.drawable.btnpre);
        canvas.drawBitmap(Image2, 100, 100, null);

    }
 }

Answer 1

Re-write your code like this canvas.drawBitmap(Image1, x, y, null);.

And write a thread to change the value of x or y over time.

Once you change the value of x or y, please call invalidate in your Panel.java to redraw the view.