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我正在使用视图寻呼机。在这个视图寻呼机我有3页。当我运行应用程序。查看寻呼机创建左侧中心和右侧片段实例,并调用所有生命周期方法。我的问题是,当我选择中间页面时,我需要显示一些数据。但我无法获得任何回调方法。请帮帮我。提前致谢。如何在Android中刷新ViewPager的中间页面的数据
适配器
public class ViewPagerFragmentPageAdapter extends FragmentPagerAdapter {
Context mContext;
public ViewPagerFragmentPageAdapter(Context context, FragmentManager fm) {
super(fm);
mContext = context;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return BusinessCategoryFragment.getInstance();
case 1:
return FavoriteFragment.getInstance(mContext.getResources().getString(R.string.favorite));
case 2:
return RecentFragment.getInstance(mContext.getResources().getString(R.string.recent));
default:
return BusinessCategoryFragment.getInstance();
}
}
@Override
public int getCount() {
return 3;
}
}
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewFragmentPageAdapter = new ViewPagerFragmentPageAdapter(
HomeActivity.this, getSupportFragmentManager());
mViewPager.setAdapter(mViewFragmentPageAdapter);
http://stackoverflow.com/questions/12650810/how-to-know-which-fragment-is-currently-selected-in-a-viewpager – dhke
中间页的可能的复制是'Fragment'本身与其他'片段'分离。所以如果你想刷新这个片段,不管你对这个片段做什么,只有那个fragmetn会受到影响 – hrskrs