控制ViewPager的切换速度

第一步：首先创建一个类继承Scroller

package com.front.adshow;

import android.content.Context;
import android.view.animation.Interpolator;
import android.widget.Scroller;

public class FixedSpeedScroller extends Scroller {
	private int mDuration = 1000;

	public FixedSpeedScroller(Context context) {
		super(context);
		// TODO Auto-generated constructor stub
	}

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

	@Override
	public void startScroll(int startX, int startY, int dx, int dy, int duration) {
		// Ignore received duration, use fixed one instead
		super.startScroll(startX, startY, dx, dy, mDuration);
	}

	@Override
	public void startScroll(int startX, int startY, int dx, int dy) {
		// Ignore received duration, use fixed one instead
		super.startScroll(startX, startY, dx, dy, mDuration);
	}

	public void setmDuration(int time) {
		mDuration = time;
	}

	public int getmDuration() {
		return mDuration;
	}

}

 第二步：在使用ViewPager的Activity中

viewPager = (ViewPager) findViewById(R.id.vp);
		adapter = new MyPagerAdapter();
		viewPager.setAdapter(adapter);
		try {
			Field mField = ViewPager.class.getDeclaredField("mScroller");
			mField.setAccessible(true);
			mScroller = new FixedSpeedScroller(viewPager.getContext(),new AccelerateInterpolator());
			mField.set(viewPager, mScroller);
		} catch (Exception e) {
			e.printStackTrace();
		}

 第三步：在控制ViewPager切换图片时，加入以下代码即可

viewPager.setCurrentItem(currentItem);
mScroller.setmDuration(2* 1000);

 注意：2*1000表示切换过程是2秒，可以随意设置