[android help] Android - TextView not showing

I have a TextView that used to show on the screen, and did what I wanted. However, I streamlined some later code that repositions it with a touch to it's parent FrameLayout. Now, the TextView (named angleView) ceases to show on screen, but when I print out it's coordinates, it still works the same way. Can anyone see what I'm doing wrong?

Here is the code from my onCreate() method:

angleView = new TextView(getApplicationContext());
angleView.setTextColor(Color.RED);
angleView.setText("0");
angleView.setLayoutParams(new FrameLayout.LayoutParams(SCREEN_WIDTH/20, SCREEN_HEIGHT/20));

and the code from the FrameLayout's onTouchListener:

preview.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            float y = (centerPoint.getY() - event.getY() + STATUS_BAR_HEIGHT);
            float x = (centerPoint.getX() - event.getX());
            double angle = Math.atan(y/x);
            setAngleFieldData(event, angle, y, x);
            setFingerFollower(event, angle);
            setYMeasure(event, y);
            setXMeasure(event, x);
            setTextPositions(event, angle, y, x);
            Log.i("angleX", String.valueOf(angleView.getX()));
            Log.i("angleY", String.valueOf(angleView.getY()));
            return true;
        }

        private void setAngleFieldData(MotionEvent event, double angle, float y, float x){
            angleView.setText(String.valueOf(angle));
            angleView.setX(event.getX());
            angleView.setY(event.getY());
            if(isRadians) {
                if(x < 0 && y >= 0){
                    angleView.setText(String.valueOf(2 * Math.PI + angle));
                }
            }

        }

(the other methods are irrelevant, it used to be that all the code from the individual methods was in the onTouch.)

And in case you are wondering, yes, there is a:

preview.addView(angleView);

Many thanks!

.

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