如何逐字母显示textview

Question

如何逐个字母显示textview？

我想给每个字母一个动画。

我尝试过的代码。

 public void setText(final String s)
{
    final TextView tv= (TextView)findViewById(R.id.txt1);
    final AlphaAnimation animation = new AlphaAnimation(0.0f,1.0f);
    animation.setDuration(1500);
    final int[] i = new int[1];
    i[0] = 0;
    final int length = s.length();
    final Handler handler = new Handler()
    {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            char c= s.charAt(i[0]);
            Log.d("Strange",""+c);
            tv.append(String.valueOf(c));
            tv.setAnimation(animation);               
            i[0]++;
        }
    };
    final Timer timer = new Timer();
    TimerTask taskEverySplitSecond = new TimerTask() {
        @Override
        public void run() {
            handler.sendEmptyMessage(0);
            if (i[0] == length - 1) {
                timer.cancel();
            }
        }
    };
    timer.schedule(taskEverySplitSecond, 1, 2000);
}

我不知道动画代码的正确位置。