Viewpager navigatation正向horizo​​naral方向

Question

斐伊川我的问题是我有6 frgments，我使用ViewPager导航从一个网页到另一个老虎钳versa.but我想6 fragment后一个水平向前轻扫复出1分Fragment。像从6-> 1

Answer 1

尝试添加第一片段一次在队列的末尾，并在加载时，可使用viewPager.setCurrentItem（0，假）移动到第一个片段。

实际上，它并不总是有效。参照这个答案ViewPager as a circular queue/wrapping，

我做了一个简单的例子看看：

public class MainActivity extends FragmentActivity { 

private static final int NUM_PAGES = 6; 
private ViewPager pager; 
private PagerAdapter pagerAdapter; 
private List<SlideFragment> slideList; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    slideList = new ArrayList<SlideFragment>(); 
    for (int i = 0; i<NUM_PAGES; i++){ 
     SlideFragment slide = new SlideFragment(); 
     slide.setIndex(i+1); 
     slideList.add(slide); 
    } 

    pager = (ViewPager) findViewById(R.id.pager); 
    pagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager()); 
    pager.setAdapter(pagerAdapter); 
} 

private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter { 

    public ScreenSlidePagerAdapter(FragmentManager fm) { 
     super(fm); 
    } 

    @Override 
    public Fragment getItem(int position) { 
     int _pos = position % NUM_PAGES; 
     return slideList.get(_pos); 
    } 

    @Override 
    public int getCount() { 
     return Integer.MAX_VALUE; 
    } 
} 
} 

而且Fragment类：

public class SlideFragment extends Fragment { 

private int index; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    ViewGroup root = (ViewGroup)inflater.inflate(R.layout.slide, container, false); 
    TextView tw = (TextView) root.findViewById(R.id.textView); 
    tw.setText(Integer.toString(index)); 
    return root; 
} 

public void setIndex(int index){ 
    this.index = index; 
} 
}