改变ViewPager的内容之间切换动画的速度

<span style="font-size:18px;">public class ViewPagerScroller extends Scroller {
private int mDuration;

public ViewPagerScroller(Context context) {
super(context);
}

public ViewPagerScroller(Context context, Interpolator interpolator) {
super(context, interpolator);
}

public void setDuration(int mDuration) {
this.mDuration = mDuration;
}

@Override
public void startScroll(int startX, int startY, int dx, int dy) {
super.startScroll(startX, startY, dx, dy, this.mDuration);
}

@Override
public void startScroll(int startX, int startY, int dx, int dy, int duration) {
super.startScroll(startX, startY, dx, dy, this.mDuration);
}

}</span>

ViewPager.java源码内容里边有

private Scroller mScroller;

void initViewPager() {
setWillNotDraw(false);
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setFocusable(true);
final Context context = getContext();
mScroller = new Scroller(context, sInterpolator);
......

private void setViewPagerScrollSpeed(ViewPager viewPager, int speed) {
try {
Field field = ViewPager.class.getDeclaredField("mScroller");
field.setAccessible(true);
ViewPagerScroller viewPagerScroller = new ViewPagerScroller(viewPager.getContext(), new OvershootInterpolator(0.6F));
field.set(viewPager, viewPagerScroller);
viewPagerScroller.setDuration(speed);
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}