在 ViewPager android 中创建片段

Question

MainActivity(extends fragmentActivity) 具有调用 listviewadapter 的 listview，如果我需要在 ViewPager 中生成 5 个片段，则现在在其中有一个带有 ViewpagerAdapter 的 ViewPager 如何将 getFragmentManager() 传递给适配器。

MainActivity [fragmentActivity] ----> Listview ----> ListviewAdapter[Custom BaseAdapterAdapter with getview of layout ViewPager] - --> ViewPager ---> ViewPageAdapter[我需要根据位置创建5个片段？]

如果我粘贴整个代码会太长，所以我只附加了

public class ViewPagerAdapter extends PagerAdapter  {    
    ArrayList<ModelClass> arrayModelClasses = new ArrayList<ModelClass>();
    Context mcontext ;
    LinearLayout layouttest;

    final int PAGE_COUNT = 5;
    private String titles[] = new String[] { "Villa ","", "" ,"","",""};

    private int[] imageResId = { R.drawable.transparant,R.drawable.ic_action_place, R.drawable.icon_3d1,
            R.drawable.icon_flooplan,R.drawable.icon_gallery,R.drawable.icon_location };

    @SuppressLint("NewApi")
    @Override
    public void finishUpdate(ViewGroup container) {
        // TODO Auto-generated method stub
        super.finishUpdate(container);
    }

    public ViewPagerAdapter(ArrayList<ModelClass> arrayModelClasses , Context context) {
        super();
        this.arrayModelClasses = arrayModelClasses;
        this.mcontext= context;
    }

    @Override
    public boolean isViewFromObject(View collection, Object object) {
        return collection == ((View) object);
    }

    View view;

    @Override
    public Object instantiateItem(View collection, int position) {
        if (position == 0) {
            //need to call fragment 1
        }if (position == 1) {
        //need to call fragment 2
        }if (position == 2) {
        //need to call fragment 3
        }if (position == 3) {
        //need to call fragment 4
        }if (position == 4) {
        //need to call fragment 5
        }   
        return view;
    }

    @Override
    public void destroyItem(View container, int position, Object object) {
        ((ViewPager) container).removeView((View) object);
    }

    @Override
    public CharSequence getPageTitle(int position) {
         Drawable image = mcontext.getResources().getDrawable(imageResId[position]);
            image.setBounds(0, 0, image.getIntrinsicWidth(), image.getIntrinsicHeight());
            SpannableString sb = new SpannableString(" " +  titles[position] );
            ImageSpan imageSpan = new ImageSpan(image, ImageSpan.ALIGN_BOTTOM);
            sb.setSpan(imageSpan, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            return sb;
    }

    @Override
    public int getCount() {
        return PAGE_COUNT;
    }

}

link 但它使用 FragmentPagerAdapter 作为 viewPager 并从 FragmentActivity 传递了 getSupportFragmentManager 但它不可能使用 2 个适配器所以帮助。

问题：如何在 listview 中的 viewPager 中创建片段。很抱歉，如果它令人困惑。

谢谢，

Answer 1

考虑到您没有发布您的ListView 适配器，我假设您扩展了BaseAdapter（无论哪种方式都相似）。在getView(...) 方法上实例化一个新的ViewPagerAdapter 并将其设置为在列表项xml 中定义的PagerAdapter。

注意：在ListView 中包含ViewPager（特别是在以这种方式加载项目时）可能会导致性能下降。

Answer 2

我在 ViewPager 中附加了片段，代码如下

公共类 IntroslideActivity 扩展 FragmentActivity {

 private static int NUM_PAGES = 5;          

    private ViewPager mPager;


    private PagerAdapter mPagerAdapter;


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



     mPager = (ViewPager) findViewById(R.id.pager);

/** * 一个简单的分页适配器，代表 5 个 {@link ScreenSlidePageFragment} 对象，在 * 顺序。 */ 私有类 ScreenSlidePagerAdapter 扩展 FragmentPagerAdapter{

     protected  final int[] ICONS = new int[] {
         R.drawable.ic_message,
         R.drawable.ic_phone,
         R.drawable.ic_message,
         R.drawable.ic_message,
         R.drawable.ic_message
 };

    public ScreenSlidePagerAdapter(android.support.v4.app.FragmentManager fm) {
        super(fm);
    }

    @Override
    public android.support.v4.app.Fragment getItem(int position) {
        android.support.v4.app.Fragment frm = null;
        System.out.println("scrolling position"+position);
        if(position==0){

            frm=ScreenSlidePageFragment.create(position);
        }
        else if(position==1){
            frm=Screenslidetwo.create(position);
        }
        else if(position==2){
            frm=Screenslidethree.create(position);
        }
        else if(position==3){
            frm=Screenslidefour.create(position);
        }
        else if(position==4){
            frm=Screenslidefive.create(position);
        }
        return frm;
    }

    @Override
    public int getCount() {
        return NUM_PAGES;
    }
    public void setCount(int count) {
        if (count > 0 && count < 5) {
            NUM_PAGES = count;
            notifyDataSetChanged();
        }
    }


}



        mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
        mPager.setAdapter(mPagerAdapter);

} }