Is it possible to get real time coordinates of an ImageView while it is in Translate animation?

Question

I have an image of a bullet in an ImageView that does Translate animation.

I need to show real time coordinates to show how far it is from target in real time.

Answer 1

I had this idea: you can extend the standard TranslateAnimation and intercept every step of the animation by overriding the applyTransformation method.

Take a look at this incomplete/untested snippet:

private class ObservableTranslateAnimation extends TranslateAnimation{

    private float matrixValues[] = new float[9];
    private float actualDx;
    private float actualDy;

    public ObservableTranslateAnimation(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    // ... more constructors 

    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
        super.applyTransformation(interpolatedTime, t);
        //After that super is called, the matrix gets updated!

        //get the current matrix and extract what you need
        t.getMatrix().getValues(matrixValues);
        actualDx = matrixValues[Matrix.MTRANS_X];
        actualDy = matrixValues[Matrix.MTRANS_Y];

        /*
          Notify someone here (a listener?), or just read the values of actualDx, actualDy from outside
          You can also play around with the other Matrix values.
        */
    }
}