**
 * <pre>
 *     author : jarylan
 *     e-mail : jarylan@foxmail.com
 *     time   : 2017/04/24
 *     desc   : 调节 ViewPager 滑动速度；
 *     version: 1.0
 * </pre>
 *
 * 使用示例 ：
         Field mScroller = ViewPager.class.getDeclaredField("mScroller");
		 mScroller.setAccessible(true);
		 FixedSpeedScroller scroller = new FixedSpeedScroller( viewpager.getContext() );
		 mScroller.set( viewpager, scroller);
 */
public class FixedSpeedScroller extends Scroller {

	public final static int SPEED_FAST = 0;
	public final static int SPEED_SLOW = 500;
	private int mDuration = 0;

	public FixedSpeedScroller(Context context,int duration) {
		super(context);
		this.mDuration = duration;
	}

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

	@SuppressLint("NewApi")
	public FixedSpeedScroller(Context context, Interpolator interpolator,
			boolean flywheel) {
		super(context, interpolator, flywheel);
		// TODO Auto-generated constructor stub
	}

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

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