private void selectTab(int position) {
// TODO Auto-generated method stub
for (int i = 0; i < hori_lin.getChildCount(); i++) {
TextView childAt = (TextView) hori_lin.getChildAt(position);
// 字体的长度；
int k = childAt.getMeasuredWidth();
// 从字体到屏幕左边的距离；
int l = childAt.getLeft();
int s = l + k / 2 - mscreenwidth / 2;
horizontalScrollView.smoothScrollTo(s, 0);
TextView child = (TextView) hori_lin.getChildAt(i);
if (position == i) {
child.setTextColor(Color.RED);
} else {
child.setTextColor(Color.BLACK);
}
}
}