How to animate the textview (very very long text )scroll automatically horizontally

Question

I am not interested in Marquee because, in Marquee you can not control the speed of marquee. I have tried to animate the textview but Parent view clips the text at the end e

Answer 1

Here was my SOLUTION

To make the long text inside textview not be cut by parent view or by screen, I have done two things.

First, let textview inside a scroolview like below code

Then, I measure my text size then refine the textview param by doing this.

    marqueeText.setText("my long text");
    Paint textPaint = marqueeText.getPaint();
    String text = marqueeText.getText().toString();//get text
    int width = Math.round(textPaint.measureText(text));//measure the text size
    ViewGroup.LayoutParams params =  marqueeText.getLayoutParams();
    params.width = width;
    marqueeText.setLayoutParams(params); //refine

    DisplayMetrics displaymetrics = new DisplayMetrics();
    getActivity().getWindowManager().getDefaultDisplay().getRealMetrics(displaymetrics);
    int screenWidth = displaymetrics.widthPixels;

    //this is optional. do not scroll if text is shorter than screen width
    //remove this won't effect the scroll
    if (width <= screenWidth) {
        //All text can fit in screen.
        return;
    }
    //set the animation
    TranslateAnimation slide = new TranslateAnimation(0, -width, 0, 0);
    slide.setDuration(20000);
    slide.setRepeatCount(Animation.INFINITE);
    slide.setRepeatMode(Animation.RESTART);
    slide.setInterpolator(new LinearInterpolator());
    marqueeText.startAnimation(slide);

I hope this solution which took me half a day to research can help others who might meet the same problem like me.