Crash on line 157 with empty ViewPager Adapter about circleindicator HOT 4 CLOSED

Which version did you use? Empty ViewPager bug was fixed at #22 (v1.1.5 )

from circleindicator.

I am using 1.1.5

Here is how to reproduce,

1. Setup ViewPager

2. Setup Adapter (Adapter is empty) (Added code sample)

3. after some delay (handler.postDelayed) , populate adapter and set notifyDataSetChanged()

   public class MediaAdapter extends FragmentPagerAdapter {
   
   
   ArrayList<MediaFragment> fragments = new ArrayList<MediaFragment>();
   
   public MediaAdapter(FragmentManager fm) {
       super(fm);
   }
   
   public void add(ImageRequest imageRequest,String videoUrl){
       if(imageRequest==null && videoUrl==null)
           return;
       MediaFragment mediaFragment = new MediaFragment();
       mediaFragment.setImageRequest(imageRequest);
       mediaFragment.setVideoUrl(videoUrl);
       fragments.add(mediaFragment);
       this.notifyDataSetChanged();
   }
   
   @Override
   public Fragment getItem(int position) {
       return fragments.get(position);
   }
   
   @Override
   public int getCount() {
       return fragments.size();
   }
   
   @Override
   public CharSequence getPageTitle(int position) {
       return "";
   }
   }
   

from circleindicator.

Can confirm. This is the top of the stack trace:

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setBackgroundResource(int)' on a null object reference
            at me.relex.circleindicator.CircleIndicator.onPageSelected(CircleIndicator.java:157)
            at android.support.v4.view.ViewPager.dispatchOnPageSelected(ViewPager.java:1794)
            at android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:569)

This can be fixed around in the client app by calling setViewPager after changing the adapter data.

from circleindicator.

Fix f83dfa4

from circleindicator.