how to implement Scroller in textview for auto scr

问题:

I have used scroller for auto scrolling, but it keeps on scrolling even when text gets over. I want to find the position and want to stop scrolling automatically, so thta text comes to its initial position as during text scrolling text gets over. How can i do this?

The code used for autoscrolling is:

public void Scroll()
{
    //text = (TextView) findViewById(R.id.TxtView);
    length = text.getLineCount();
    scroll.computeScrollOffset();
    text.setScroller(scroll);
    int a = text.getBottom();
    int b = text.getTop();
    //scroll.extendDuration(scroll.getFinalY());
    scroll.startScroll(scroll_x, scroll_y, 0, a, (500000)/ speedAmount);    
}

回答1:

Nikki

You need to check the source code here .

again text must comes to its initial position

for this use scrollTo(0, 0);

i want to find the position

use scroll.getCurrX();

want to stop scrolling automatically

use scroll.abortAnimation();

& you are done!:)

EDITED:

Nikki,I wrote a class derived from Android.Widget.TextView to customize a TextView in which text can be scrolled until text is finished & after finishing text comes back to initial position.All you need to do is create custom class as defined here & just override computeScroll () as below

public void computeScroll() {
super.computeScroll();

if (null == mSlr) return;

if (mSlr.isFinished() && (!mPaused)) {
scrollTo(0, 0);//scroll to initial position or whatever position you want it to scroll 
}
}

回答2:

Your question inspired me to blog about this as I had similar problem just some days ago: http://b.ivity.asia/2010/12/01/extended-marquee-in-android/

I wanted to use a very custom Marquee effect, this class should be able to do the job for you.