Android左右滑动切换页面

package com.demo;

import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.TextView;

/**
* Tab页面手势滑动切换以及动画效果
* @author xdf
*
*/
public class MainActivity extends Activity {

private ViewPager mPager;//页卡内容
private List<View> listViews; // Tab页面列表
private ImageView cursor;// 动画图片
private TextView t1, t2, t3;// 页卡头标
private int offset = 0;// 动画图片偏移量
private int currIndex = 0;// 当前页卡编号
private int bmpW;// 动画图片宽度

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  initImageView();
  initTextView();
  initViewPager();
}

/**
* 初始化动画
*/
private void initImageView() {
  cursor = (ImageView) findViewById(R.id.cursor);
  bmpW = BitmapFactory.decodeResource(getResources(), R.drawable.a).getWidth();// 获取图片宽度
  DisplayMetrics dm = new DisplayMetrics();
  getWindowManager().getDefaultDisplay().getMetrics(dm);
  int screenW = dm.widthPixels;// 获取分辨率宽度
  offset = (screenW / 3 - bmpW) / 2;// 计算偏移量
  Matrix matrix = new Matrix();
  matrix.postTranslate(offset, 0);
  cursor.setImageMatrix(matrix);// 设置动画初始位置
}

/**
* 初始化头标
*/
private void initTextView() {
  t1 = (TextView) findViewById(R.id.text1);
  t2 = (TextView) findViewById(R.id.text2);
  t3 = (TextView) findViewById(R.id.text3);

  t1.setOnClickListener(new MyOnClickListener(0));
  t2.setOnClickListener(new MyOnClickListener(1));
  t3.setOnClickListener(new MyOnClickListener(2));
}

/**
* 初始化ViewPager
*/
private void initViewPager() {
  mPager = (ViewPager) findViewById(R.id.vPager);
  listViews = new ArrayList<View>();
  LayoutInflater mInflater = getLayoutInflater();
  listViews.add(mInflater.inflate(R.layout.lay1, null));
  listViews.add(mInflater.inflate(R.layout.lay2, null));
  listViews.add(mInflater.inflate(R.layout.lay3, null));
  mPager.setAdapter(new MyPagerAdapter(listViews));
  mPager.setCurrentItem(0);
  mPager.setOnPageChangeListener(new MyOnPageChangeListener());
}

/**
* ViewPager适配器
*/
public class MyPagerAdapter extends PagerAdapter {
public List<View> mListViews;

  public MyPagerAdapter(List<View> mListViews) {
   this.mListViews = mListViews;
  }

  @Override
  public void destroyItem(View arg0, int arg1, Object arg2) {
   ((ViewPager) arg0).removeView(mListViews.get(arg1));
  }

@Override
public void finishUpdate(View arg0) {}

  @Override
  public int getCount() {
   return mListViews.size();
  }

  @Override
  public Object instantiateItem(View arg0, int arg1) {
   ((ViewPager) arg0).addView(mListViews.get(arg1), 0);
   return mListViews.get(arg1);
  }
  @Override
  public boolean isViewFromObject(View arg0, Object arg1) {
   return arg0 == (arg1);
  }
  @Override
  public void restoreState(Parcelable arg0, ClassLoader arg1) {}
  @Override
  public Parcelable saveState() {
   return null;
  }
  @Override
  public void startUpdate(View arg0) {}
}

/**
* 头标点击监听
*/
public class MyOnClickListener implements View.OnClickListener {
private int index = 0;

  public MyOnClickListener(int i) {
   index = i;
  }

  @Override
  public void onClick(View v) {
   mPager.setCurrentItem(index);
  }
};

/**
* 页卡切换监听
*/
public class MyOnPageChangeListener implements OnPageChangeListener {

int one = offset * 2 + bmpW;// 页卡1 -> 页卡2 偏移量
int two = one * 2;// 页卡1 -> 页卡3 偏移量

  @Override
  public void onPageSelected(int arg0) {
   Animation animation = null;
   switch (arg0) {
   case 0://页卡1
    if (currIndex == 1) {
     animation = new TranslateAnimation(one, 0, 0, 0);
    } else if (currIndex == 2) {
     animation = new TranslateAnimation(two, 0, 0, 0);
    }
    break;
   case 1://页卡2
    if (currIndex == 0) {
     animation = new TranslateAnimation(offset, one, 0, 0);
    } else if (currIndex == 2) {
     animation = new TranslateAnimation(two, one, 0, 0);
    }
    break;
   case 2://页卡3
    if (currIndex == 0) {
     animation = new TranslateAnimation(offset, two, 0, 0);
    } else if (currIndex == 1) {
     animation = new TranslateAnimation(one, two, 0, 0);
    }
    break;
   }
   currIndex = arg0;
   animation.setFillAfter(true);// True:图片停在动画结束位置
   animation.setDuration(300);
   cursor.startAnimation(animation);
  }

  @Override
  public void onPageScrolled(int arg0, float arg1, int arg2) {}
  @Override
  public void onPageScrollStateChanged(int arg0) {}
}
}

布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <android.support.v4.view.ViewPager
        android:id="@+id/vPager"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:background="#000000"
        android:flipInterval="30"
        android:persistentDrawingCache="animation" />

</LinearLayout>

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Android左右滑动切换页面

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