问题描述

为什么我的滚动条没有滚动？

代码如下：
public class MainActivity extends ActionBarActivity {
private ViewPager viewPager;
private ImageView cursor;
private Listlists=new ArrayList<>();
private TextView t1t2t3;
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(00);    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.fragment1null));    lists.add(inflater.inflate(R.layout.fragment2null));    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(one000);                }                else if (currindex==2){                    animation=new TranslateAnimation(two000);                }                break;            case 1:                if (currindex==0){                    animation=new TranslateAnimation(offestone00);                }                else if (currindex==2){                    animation=new TranslateAnimation(twoone00);                }                break;            case 2:                if (currindex==0){                    animation=new TranslateAnimation(offesttwo00);                }                else if (currindex==1){                    animation=new TranslateAnimation(onetwo00);                }                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：
开发-为什么我的滚动条没有滚动？-android滚动条">

解决方案

你的adapter没有getItem啊

解决方案二：
可以说的具体一点吗？谢谢

解决方案三：
没有滚动条的ScrollView