屏幕外viewpager碎片将不会加载第1次后呈现 [英] offscreen viewpager fragments won't render after 1st time loaded
问题描述
我有5选项卡的viewpager,如果我去的第5段(也就是当我点击第五选项卡或滑动到5片装的片段),然后我去了第三个选项卡中的第5段获得了 ŧ再装入看法,如果我去的第二或第一个选项卡中的第4和第5片不会。我试图改变viewpager.offscreenlimit(3),甚至5没有结果。如果它可以帮助任何人弄清楚,那无论我把什么片段到位第三第四和第五的位置会发生。另外,第一viewpager变化需要一段时间,大约1.5秒。
这是我的code
mport android.os.Bundle;
进口android.support.v4.app.Fragment;
进口android.support.v4.app.FragmentManager;
进口android.support.v4.app.FragmentStatePagerAdapter;
进口android.view.ViewGroup;进口的java.util.List;公共类AppSectionsPagerAdapter扩展FragmentStatePagerAdapter
{
私有静态的String [] = fragmentNames {Example0,例1,例题,例3,例4};
私人FragmentManager fragmentManager = NULL;
私人列表<片断>碎片= NULL;
片段example0;
片段例1;
片段示例2;
片段例3;
例4片段;
INT numFragments;
INT错误code;公共AppSectionsPagerAdapter(FragmentManager FM)
{
超(FM);
numFragments = 5;
this.fragmentManager =调频;
example0 =新ListFragment();
例1 =新ListFragment();
例2 =新ListFragment();
例3 =新的片断();
例4 =新片段();}
@覆盖
公共片段的getItem(int i)以
{
开关(ⅰ)
{
情况下0:
返回example0;
情况1:
返回例1;
案例2:
返回例题;
案例3:
返回例3;
情况4:
返回例4; 默认:
片段FRAG =新Error_Fragment();
捆绑ARGS =新包();
错误code = -5;
//args.putInt(error$c$c,1 + 1);
frag.setArguments(参数);
返回FRAG;
}
}
@覆盖
公众诠释getCount将()
{
返回numFragments;
}@覆盖
公共CharSequence的getPageTitle(INT位置)
{
返回fragmentNames [位置]
}@覆盖
公共无效setPrimaryItem(ViewGroup中的容器,INT位置,Object对象)
{
super.setPrimaryItem(容器,0,对象);
}
@覆盖
公共无效notifyDataSetChanged()
{
super.notifyDataSetChanged();
}
@覆盖
公共无效destroyItem(ViewGroup中收集,INT位置,对象视图)
{
fragmentManager.executePendingTransactions();
//fragmentManager.saveFragmentInstanceState(fragments.get(position));
}
}
我终于想通了!我有code的这些行
vpager.setPageTransformer(假,新ViewPager.PageTransformer()//页面刷卡动画
{
@覆盖
公共无效transformPage(查看页面,浮动的位置)
{
INT页宽= page.getWidth();
INT pageHeight = page.getHeight(); 如果(位置< -1)// [-Infinity,-1)
{
//该页面的方式关闭屏幕左侧。
page.setAlpha(1);
}
否则如果(位置及下; = 1)//页的左侧,页居中,页向右
{
//此处修改页面视图动画在视图页面
}
否则//(1 +无限远]
{
//该页面的方式关闭屏幕右侧。
page.setAlpha(0);
}
}
});
和我简单地评论他们。我想我应该张贴,但我不知道它可能与页面没有加载干扰。
I have a viewpager with 5 tabs and if I go to the 5th fragment(that is the fragment loaded when I click the 5th tab or swipe to the 5th tab) and then I go to the 3rd tab the 5th fragment won't load the view anymore and if I go to the 2nd or 1st tab the 4th and 5th tabs won't. I tried changing the viewpager.offscreenlimit(3) or even 5 with no results. If it helps anyone figure it out, it happens regardless of what fragments I put in place of the 3rd 4th and 5th positions. Also, the first viewpager change takes a while , about 1.5 seconds.
here is my code
mport android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.view.ViewGroup;
import java.util.List;
public class AppSectionsPagerAdapter extends FragmentStatePagerAdapter
{
private static String[] fragmentNames = { "Example0", "Example1", "Example2","Example3","Example4"};
private FragmentManager fragmentManager = null;
private List<Fragment> fragments=null;
Fragment example0;
Fragment example1;
Fragment example2;
Fragment example3;
Fragment example4;
int numFragments;
int errorcode;
public AppSectionsPagerAdapter(FragmentManager fm)
{
super(fm);
numFragments = 5;
this.fragmentManager = fm;
example0 = new ListFragment();
example1 = new ListFragment();
example2 = new ListFragment();
example3 = new Fragment();
example4 = new Fragment();
}
@Override
public Fragment getItem(int i)
{
switch (i)
{
case 0:
return example0;
case 1:
return example1;
case 2:
return example2;
case 3:
return example3;
case 4:
return example4;
default:
Fragment frag = new Error_Fragment();
Bundle args = new Bundle();
errorcode = -5;
//args.putInt(errorcode, i + 1);
frag.setArguments(args);
return frag;
}
}
@Override
public int getCount()
{
return numFragments;
}
@Override
public CharSequence getPageTitle(int position)
{
return fragmentNames[position];
}
@Override
public void setPrimaryItem(ViewGroup container, int position, Object object)
{
super.setPrimaryItem(container,0,object);
}
@Override
public void notifyDataSetChanged()
{
super.notifyDataSetChanged();
}
@Override
public void destroyItem(ViewGroup collection, int position, Object view)
{
fragmentManager.executePendingTransactions();
//fragmentManager.saveFragmentInstanceState(fragments.get(position));
}
}
I finally figured it out! I had these lines of code
vpager.setPageTransformer(false, new ViewPager.PageTransformer() // page swipe animations
{
@Override
public void transformPage(View page, float position)
{
int pageWidth = page.getWidth();
int pageHeight = page.getHeight();
if (position < -1) // [-Infinity,-1)
{
// This page is way off-screen to the left.
page.setAlpha(1);
}
else if(position <= 1) // Page to the left, page centered, page to the right
{
// modify page view animations here for pages in view
}
else // (1,+Infinity]
{
// This page is way off-screen to the right.
page.setAlpha(0);
}
}
});
and I simply commented them out. I guess I should have posted that but I had no idea it could interfere with pages not loading.
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