android viewpager 学习使用总结

    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical"    android:background="#222222" >

package com.example.myview;import java.util.List;import android.support.v4.view.PagerAdapter;import android.view.View;import android.support.v4.view.ViewPager;public class MyAdapter extends PagerAdapter{    List viewLists;        public MyAdapter(List lists)    {        viewLists = lists;    }    @Override    public int getCount() {                                                                 //获得size        // TODO Auto-generated method stub        return viewLists.size();    }    @Override    public boolean isViewFromObject(View arg0, Object arg1) {                                 // TODO Auto-generated method stub        return arg0 == arg1;    }        @Override    public void destroyItem(View view, int position, Object object)                       //销毁Item    {        ((ViewPager) view).removeView(viewLists.get(position));    }        @Override    public Object instantiateItem(View view, int position)                                //实例化Item    {        ((ViewPager) view).addView(viewLists.get(position), 0);        return viewLists.get(position);    }    }

package com.example.myview;import java.util.List;import java.util.ArrayList;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.support.v4.view.ViewPager;import android.view.View;import android.widget.TextView;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.util.DisplayMetrics;import android.graphics.Matrix;import android.widget.ImageView;import android.view.animation.Animation;import android.view.animation.TranslateAnimation;public class MainActivity extends Activity {    private ViewPager viewPager;    private ImageView imageView;    private List lists = new ArrayList();    private MyAdapter myAdapter;    private Bitmap cursor;    private int offSet;    private int currentItem;    private Matrix matrix = new Matrix();    private int bmWidth;    private Animation animation;    private TextView textView1;    private TextView textView2;    private TextView textView3;        @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                imageView = (ImageView) findViewById (R.id.cursor);        textView1 = (TextView) findViewById (R.id.textView1);        textView2 = (TextView) findViewById (R.id.textView2);        textView3 = (TextView) findViewById (R.id.textView3);                lists.add(getLayoutInflater().inflate(R.layout.layout1, null));        lists.add(getLayoutInflater().inflate(R.layout.layout2, null));        lists.add(getLayoutInflater().inflate(R.layout.layout3, null));                initeCursor();                myAdapter = new MyAdapter(lists);                viewPager = (ViewPager) findViewById (R.id.viewPager);        viewPager.setAdapter(myAdapter);        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {                        @Override            public void onPageSelected(int arg0) {                                 //当滑动式，顶部的imageView是通过animation缓慢的滑动                // TODO Auto-generated method stub                switch (arg0)                {                case 0:                    if (currentItem == 1)                    {                        animation = new TranslateAnimation(                                offSet * 2 + bmWidth, 0 , 0, 0);                    }                    else if(currentItem == 2)                    {                        animation = new TranslateAnimation(                                offSet * 4 + 2 * bmWidth, 0, 0, 0);                    }                    break;                case 1:                    if (currentItem == 0)                    {                        animation = new TranslateAnimation(                                0, offSet * 2 + bmWidth, 0, 0);                    }                    else if (currentItem == 2)                    {                        animation = new TranslateAnimation(* offSet + 2 * bmWidth, offSet * 2 + bmWidth, 0, 0);                    }                    break;                case 2:                    if (currentItem == 0)                    {                        animation = new TranslateAnimation(                                0, 4 * offSet + 2 * bmWidth, 0, 0);                    }                    else if (currentItem == 1)                    {                        animation = new TranslateAnimation(                                offSet * 2 + bmWidth, 4 * offSet + 2 * bmWidth, 0, 0);                    }                }                currentItem = arg0;                                animation.setDuration(500);                animation.setFillAfter(true);                imageView.startAnimation(animation);                            }                        @Override            public void onPageScrolled(int arg0, float arg1, int arg2) {                // TODO Auto-generated method stub                            }                        @Override            public void onPageScrollStateChanged(int arg0) {                // TODO Auto-generated method stub                            }        });                textView1.setOnClickListener(new View.OnClickListener() {                        @Override            public void onClick(View arg0) {                // TODO Auto-generated method stub                viewPager.setCurrentItem(0);            }        });                textView2.setOnClickListener(new View.OnClickListener() {                        @Override            public void onClick(View arg0) {                // TODO Auto-generated method stub                viewPager.setCurrentItem(1);            }        });                textView3.setOnClickListener(new View.OnClickListener() {                        @Override            public void onClick(View arg0) {                // TODO Auto-generated method stub                viewPager.setCurrentItem(2);            }        });    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.activity_main, menu);        return true;    }        private void initeCursor()    {        cursor = BitmapFactory.decodeResource(getResources(), R.drawable.cursor);        bmWidth = cursor.getWidth();                DisplayMetrics dm;        dm = getResources().getDisplayMetrics();                offSet = (dm.widthPixels - 3 * bmWidth) / 6;        matrix.setTranslate(offSet, 0);        imageView.setImageMatrix(matrix);                                             //需要iamgeView的scaleType为matrix        currentItem = 0;    }}

代码都看的懂，三个页的xml就不增加了，页面也没有什么内容，都可以自己定义

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