Question

MainActivity（extends fragmentActivity）有listview，如果我需要在ViewPager中生成5个片段，如何将getFragmentManager（）传递给适配器，则listview调用listviewadapter，其中ViewPager现在有ViewPagerAdapter。

MainActivity [fragmentActivity] ----＆gt; Listview ----＆gt; ListviewAdapter [带有getview布局ViewPager的自定义BaseAdapterAdapter] ---＆gt; ViewPager ---＆gt; ViewPageAdapter [我需要根据位置创建5个片段吗？]

如果我粘贴整个代码就太长了，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进行viewPager并从FragmentActivity传递getSupportFragmentManager，但是不能用2个适配器帮助。

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

谢谢，

Answer 1

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

注意：在ViewPager内部ListView（特别是在加载项目时）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扩展了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);

/ ** *一个简单的寻呼机适配器，代表5个{@link ScreenSlidePageFragment}对象 * 序列。 * / 私有类ScreenSlidePagerAdapter扩展了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);

} }

在ViewPager android中创建片段

2 个答案: