Question

我使用viewpagerindicator并从服务器获得6个带自定义列表视图的片段。在启动时，此活动看起来所有片段都在加载。我想要一个片段启动刚刚打开，点击或刷卡并进行加载。并且在打开，点击或稍后滑动时将加载尚未打开的片段。如何？

这是我的代码适配器viewpager

import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

public class ViewAdapter extends FragmentPagerAdapter{

    private Context _context;
    String[] page_titles;

    public ViewAdapter(Context context, FragmentManager fm, String[] page_title){
        super(fm);
        _context = context;
        this.page_titles = page_title;
    }



    @Override
    public Fragment getItem(int position) {
        // TODO Auto-generated method stub

        Fragment f = new Fragment();

        switch(position){
        case 0:
            f = ContentActivity.newInstance(_context);
            break;

        case 1:
            f = ContentActivity.newInstance(_context);
            break;
        case 2:
            f = ContentActivity.newInstance(_context);
            break;
             case 3:
            f = ContentActivity.newInstance(_context);
            break;
        case 4:
            f = ContentActivity.newInstance(_context);
            break;
                    case 5:
            f = ContentActivity.newInstance(_context);
            break;
        }

        return f;
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return page_titles.length;
    }

    public CharSequence getPageTitle(int position) {
        return page_titles[position];
    }



}

我已经设置了

pager = (ViewPager) findViewById(R.id.pager); 
pager.setOffscreenPageLimit(1);

但是如果我从片段0滑动到片段索引1并且向后滑动到索引0或其他索引，总是重新加载内容，我想如果后面滑动到之前的片段不再重新加载？它怎么样

谢谢......对不起我的英文..

Answer 1

在适配器构造函数中创建一个片段数组，并从getItem

返回已创建的片段

   Fragment[] f=new Fragment[6];

   public ViewAdapter(Context context, FragmentManager fm, String[] page_title){
        super(fm);
        _context = context;
        this.page_titles = page_title;

            f[0] = ContentActivity.newInstance(_context);
            f[1] = ContentActivity.newInstance(_context);
            f[2] = ContentActivity.newInstance(_context);
            f[3] = ContentActivity.newInstance(_context);
            f[4] = ContentActivity.newInstance(_context);
            f[5] = ContentActivity.newInstance(_context);

    }



    @Override
    public Fragment getItem(int position) {
        // TODO Auto-generated method stub

        return f[position];
    }

只需单击或滑动viewpagerindicator片段加载，不加载所有片段？

1 个答案: