android - Pass data from Activity to Fragment in ViewPager

Question

I have a simple Activity with TabLayout, ViewPager and 2 Fragments in it. Here\'s my Activity:

public class ManagementCompanyOverviewActivity extends BaseAct         


        

Answer 1

From Activity or ViewPager

Bundle bundle = new Bundle();
bundle.putParcelable(Keys.KEY_ITEM, cardResult);
CardItemFragment cardItemFragment = new CardItemFragment();
cardItemFragment.setArguments(bundle);

From Fragment

@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
     getBundle();
}


private void getBundle() {
    bundle = getArguments();
    if (null != bundle) {
        if (bundle.containsKey(Keys.KEY_ITEM)) {
            cardResult = bundle.getParcelable(Keys.KEY_ITEM);
        }
    }
}

Answer 2

You can use newInstance method in your Fragment:

public static MyFragment newInstance(String parameter) {

        Bundle args = new Bundle();
        args.putString("parameter", parameter);
        SfCategoryFragment fragment = new SfCategoryFragment();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        if (getArguments() != null) {
            parameter = getArguments().getString("parameter");
        }
    }

And in your Activity:

instead of new MyFragment() use MyFragment.newInstance("yourParam");

Answer 3

You could also in your adapter's constructor take in the data you want to display in the fragment and set the arguments before returning a new fragment

public class ViewPagerAdapter extends FragmentStatePagerAdapter {
private Weather weather;

ViewPagerAdapter(FragmentManager fm, Weather weather) {
    super(fm);
    this.weather = weather;
}

@Override
public Fragment getItem(int position) {
    switch (position) {
        case 0:
            Bundle bundle = new Bundle();
            WeatherFragment weatherFragment = new WeatherFragment();
            bundle.putParcelable("weather", weather);
            weatherFragment.setArguments(bundle);
            return weatherFragment;
        case 1:
            return new PoemFragment();
        default:
            return new EmptyFragment();
    }
}

Answer 4

Fragment

class SampleFragment : Fragment(), BaseFragmentInteraction {
    override fun updateFragmentData(data: String) {
        Toast.makeText(activity!!, data, Toast.LENGTH_SHORT).show()
    }
}

Interface

interface BaseFragmentInteraction {
    fun updateFragmentData(data: String)
}

Activity:

view_pager.addOnPageChangeListener(object : ViewPager.OnPageChangeListener {

        override fun onPageSelected(position: Int) {
            val fragmentItem = (view_pager.adapter as FragmentPagerAdapter).getItem(view_pager.currentItem)
            (fragmentItem as BaseFragmentInteraction).updateFragmentData("SomeData")
        }

        override fun onPageScrollStateChanged(state: Int) {}

        override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {}
    })

The updateFragmetData method will be called in the current selected viewpager item fragment. You can also add a tag parameter to updateFragmetData so that you can be sure the right fragment instance is called. If required you can call isVisible in updateFragmetData implementation to make sure the fragment is visible.

Answer 5

Okay, I did this.

1 step: I created public interface in my Activity and setter for it:

private OnAboutDataReceivedListener mAboutDataListener;

public interface OnAboutDataReceivedListener {
        void onDataReceived(AboutCompanyViewModel model);
    }

public void setAboutDataListener(OnAboutDataReceivedListener listener) {
    this.mAboutDataListener = listener;
}

2 step: I implemented this interface in my Fragment and set listener:

public class AboutCompanyFragment extends BaseFragment implements ManagementCompanyOverviewActivity.OnAboutDataReceivedListener

    @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            mActivity = (ManagementCompanyOverviewActivity) getActivity();
            mActivity.setAboutDataListener(this);
        }

3 step: I overrided interface's method:

@Override
    public void onDataReceived(AboutCompanyViewModel model) {
        mPBName.setVisibility(View.INVISIBLE);
        mPBDirector.setVisibility(View.INVISIBLE);
        mPBWebsite.setVisibility(View.INVISIBLE);
        mPBEmail.setVisibility(View.INVISIBLE);
        mPBPhone.setVisibility(View.INVISIBLE);
        mPBSchedule.setVisibility(View.INVISIBLE);
        mPBAddress.setVisibility(View.INVISIBLE);

        mTVName.setVisibility(View.VISIBLE);
        mTVDirector.setVisibility(View.VISIBLE);
        mTVWebsite.setVisibility(View.VISIBLE);
        mTVEmail.setVisibility(View.VISIBLE);
        mTVPhone.setVisibility(View.VISIBLE);
        mTVSchedule.setVisibility(View.VISIBLE);
        mTVAddress.setVisibility(View.VISIBLE);

        mTVName.setText(model.getCompanyName());
        mTVDirector.setText(model.getDirectorName());
        mTVWebsite.setText(model.getWebsite());
        mTVEmail.setText(model.getEmail());
        mTVPhone.setText(model.getPhone());
        mTVSchedule.setText(model.getWorkTime());
        mTVAddress.setText(model.getAddress());
    }

That's it.

Answer 6

Try this In activity

public String sendData() {
        return YOUR_STRING;
    }

In Fragment

YOUR_ACTIVITY activity = (YOUR_ACTIVITY) getActivity();
String getData = activity.SendData();