Need Help To Fix Code For Getting Current View In Viewpager

Need help to fix a code I saw in a https://stackoverflow.com/a/9275732/1938357. The solution I need is get the current view onany page in my viewpager based application Below is th

Solution 1:

It is very hard to discuss in comments with example of code.

As I see in grepcode FragmentStatePagerAdapter.setPrimaryItem(), receive object as android.support.v4.app.Fragment. But you are receive ClassCastException when trying to cast object as Fragment. Can you check your casting: do you really cast object in android.support.v4.app.Fragment not in android.app.Fragment? If all right, add your exception message to your question, please.

UPDATE:

If your ScreenSlidePagerAdapter has method getCurrentView(), then your method 'getCurrentView()' can work like this:

public View getCurrentView(ViewPager pager) {
    return ((ScreenSlidePagerAdapter) pager.getAdapter()).getCurrentView();
}

And method getCurrentView() of your ScreenSlidePagerAdapter:

public View getCurrentView() {
    return currView;
}

UPDATE 2:

I've made some modification with your code:

Your Activity with private Adapter:

publicclassmyActivityextendsFragmentActivityimplementsISelectItemListener {
    // Your variable declarations and methods@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
        finalViewPagerpager= (ViewPager) findViewById(R.id.pager);

        mPagerAdapter = newScreenSlidePagerAdapter(getSupportFragmentManager());
        pager.setAdapter(mPagerAdapter);

        pager.setOnPageChangeListener(
                newOnPageChangeListener() {
                    @OverridepublicvoidonPageSelected(int pageSelected) {
                        finalScreenSlidePageFragmentfragment= mPagerAdapter.getFragment(pageSelected);

                        if (fragment != null) {
                            fragment.doTextViewChnges();
                        }
                    }

                    @OverridepublicvoidonPageScrollStateChanged(int arg0) {
                        // TODO Auto-generated method stub
                    }

                    @OverridepublicvoidonPageScrolled(int arg0, float arg1, int arg2) {
                        // TODO Auto-generated method stub
                    }
                });
    }

    privateclassScreenSlidePagerAdapterextendsFragmentStatePagerAdapter {
        //Your variable declarationsprivatefinal ScreenSlidePageFragment[] mFragments;

        publicScreenSlidePagerAdapter(android.support.v4.app.FragmentManager fm) {
            super(fm);

            mFragments = newScreenSlidePageFragment[NUM_PAGES];
        }

        @OverridepublicintgetCount() {
            return NUM_PAGES;
        }




        // It will create new ScreenSlidePageFragment by position if it's not exsist@Overridepublic android.support.v4.app.Fragment getItem(int position) {
            if (getFragment(position) == null) {
                mFragments[position] = ScreenSlidePageFragment.create(position, <other parameters I want to pass>);
            }

            return getFragment(position);
        }

        // It will give you ScreenSlidePageFragment if it's exists, or nullpublic ScreenSlidePageFragment getFragment(int position) {
            return mFragments[position];
        }
    }
}

Your Fragment:

publicclassScreenSlidePageFragmentextendsFragment {
    //Your variables and methodspublicstatic ScreenSlidePageFragment create(int pageNumber, String[] pages, int bookmarkPageNumber, String storyName, int linesInOnePage) {
        finalBundleargs=newBundle();
        args.putInt(ARG_PAGE, pageNumber);
        args.putStringArray(ARG_PAGEARRAY, pages);

        finalScreenSlidePageFragmentfragment=newScreenSlidePageFragment();
        fragment.setArguments(args); 

        return fragment;
    }

    @OverridepublicvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mPageNumber = getArguments().getInt(ARG_PAGE);
        pages = getArguments().getStringArray(ARG_PAGEARRAY);
    }

    @Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        rootView = (ViewGroup) inflater.inflate(R.layout.activity_story, container, false);

        loadView(rootView);
        return rootView;
    }

    publicintgetPageNumber() {
        return mPageNumber;
    }

    // Let's keep logic of modifications in fragmentpublicvoiddoTextViewChnges() {
        finalViewview= getView();
        // do what you want with your View and his children
    }
}