代码如下：
public class MainActivity extends ActionBarActivity {
private ViewPager viewPager;
private ImageView cursor;
private Listlists=new ArrayList<>();
private TextView t1,t2,t3;
private int currindex=0;//当前页卡编号
private int tpwidth;//滚动条宽度
private int offest;//滚动条偏移量
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
viewPagerView();
initImageView();
}
private void initImageView() {
cursor= (ImageView) findViewById(R.id.cursor);
tpwidth= BitmapFactory.decodeResource(getResources(),R.drawable.slidings).getWidth();//获得滚动条宽度
DisplayMetrics dm=new DisplayMetrics();
System.out.println(tpwidth + "aaaaaaaaaa");
getWindowManager().getDefaultDisplay().getMetrics(dm);
int screenWidth=dm.widthPixels;//获得屏幕分辨率
System.out.println(screenWidth + "!!!!!!!!!!!!!!!!!!!");
offest=(screenWidth/3-tpwidth);
System.out.println(offest + "1111111");
Matrix matrix=new Matrix();
matrix.postTranslate(0,0);
cursor.setImageMatrix(matrix);//设置滚动条开始位置
}
private void viewPagerView() {
viewPager= (ViewPager) findViewById(R.id.viewPager);
cursor= (ImageView) findViewById(R.id.cursor);
LayoutInflater inflater =getLayoutInflater();
lists.add(inflater.inflate(R.layout.fragment1,null));
lists.add(inflater.inflate(R.layout.fragment2,null));
lists.add(inflater.inflate(R.layout.fragment3, null));
viewPager.setAdapter(new MyPageAdapter(lists));
viewPager.setCurrentItem(0);//默认第一个
viewPager.setOnPageChangeListener(new MyOnPageChangeListener());
}
private void initView() {
t1= (TextView) findViewById(R.id.TextView1);
t2= (TextView) findViewById(R.id.TextView2);
t3= (TextView) findViewById(R.id.TextView3);
t1.setOnClickListener(new MyOnClickListener(0));
t2.setOnClickListener(new MyOnClickListener(1));
t3.setOnClickListener(new MyOnClickListener(2));
}
private class MyOnClickListener implements View.OnClickListener {
private int index=0;
public MyOnClickListener(int i) {
index=i;
}
public void onClick(View v) {
viewPager.setCurrentItem(index);
}
}
private class MyPageAdapter extends PagerAdapter {
private List<View>mlists;
public MyPageAdapter(List<View> lists) {
this.mlists=lists;
}
public int getCount() {
return mlists.size();
}
public void finishUpdate(View container) {
}
public Object instantiateItem(ViewGroup container, int position) {
((ViewPager) container).addView(mlists.get(position), 0);
return mlists.get(position);
}
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView(mlists.get(position));
}
public boolean isViewFromObject(View view, Object o) {
return view==o;
}
public void restoreState(Parcelable state, ClassLoader loader) {
}
public void startUpdate(ViewGroup container) {
}
public Parcelable saveState() {
return null;
}
}
private class MyOnPageChangeListener implements ViewPager.OnPageChangeListener {
int one=offest+tpwidth;//页卡一到页卡二的偏移量
int two=one*2;//页卡一到页卡三的偏移量
public void onPageSelected(int i) {
Animation animation=null;
switch (i){
case 0 :
if (currindex==1){
animation=new TranslateAnimation(one,0,0,0);
}
else if (currindex==2){
animation=new TranslateAnimation(two,0,0,0);
}
break;
case 1:
if (currindex==0){
animation=new TranslateAnimation(offest,one,0,0);
}
else if (currindex==2){
animation=new TranslateAnimation(two,one,0,0);
}
break;
case 2:
if (currindex==0){
animation=new TranslateAnimation(offest,two,0,0);
}
else if (currindex==1){
animation=new TranslateAnimation(one,two,0,0);
}
break;
}
currindex=i;
animation.setFillAfter(true);//true:图片停在滚动结束的位置
animation.setDuration(300);
cursor.startAnimation(animation);
}
public void onPageScrolled(int i, float v, int i1) {
}
public void onPageScrollStateChanged(int i) {
}
}
}
运行效果截图：
