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 BaseActivity implements ManagementCompanyOverviewView {

    private ManagementCompanyVPAdapter mVPAdapter;
    private TabLayout mTLContent;
    private ViewPager mVPContent;

    @InjectPresenter
    ManagementCompanyPresenter mPresenter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_management_company);

        mVPAdapter = new ManagementCompanyVPAdapter(getSupportFragmentManager());

        mTLContent = (TabLayout) findViewById(R.id.tl_company_content);

        mVPContent = (ViewPager) findViewById(R.id.vp_company_content);
        mVPContent.setAdapter(mVPAdapter);
        mTLContent.setupWithViewPager(mVPContent);
    }

    @Override
    public void onAboutCompanyInfoReceivedFromServer(AboutCompanyViewModel model) {

    }

Activity has a Presenter (I'm using Moxy), Presenter sends request, gets answer, creates JavaObject (view model) and with getViewState() passes this model to activity. I need to pass this model from Activity to one of my Fragments.

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

    View view = inflater.inflate(R.layout.fragment_about_company, container, false);

    mTVName = (TextView) view.findViewById(R.id.tv_company_name);
    mTVDirector = (TextView) view.findViewById(R.id.tv_company_director);
    mTVWebsite = (TextView) view.findViewById(R.id.tv_company_website);
    mTVEmail = (TextView) view.findViewById(R.id.tv_company_email);
    mTVPhone = (TextView) view.findViewById(R.id.tv_company_phone);
    mTVSchedule = (TextView) view.findViewById(R.id.tv_company_schedule);
    mTVAddress = (TextView) view.findViewById(R.id.tv_company_address);

    return view;
}

This fragment has some TextViews to show the info from my model. How to pass this model? If I know it right I should create a listener, but how? I don't completely understand how to work with em.

Solution 1

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.

Solution 2

Try this In activity

public String sendData() {
        return YOUR_STRING;
    }

In Fragment

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

Solution 3

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");

Solution 4

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();
    }
}

Solution 5

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);
        }
    }
}

View more solutions

Comments

[Den]

Nope, not gonna work. Data comes from the server and it can be received in 3-5 seconds. Method public void onAboutCompanyInfoReceivedFromServer(AboutCompanyViewModel model) is called when my Activity received this data.

[Den]

Activity should send data to fragment, when the data is ready. I can't use getter.

[MKovac]

You can try setupViewPager when you receive data, i did like that in my app

[Den]

Can you post some example code? Just edit your first answer :)

[MKovac]

I don't know where you are getting data. I'm using AsyncTask and when task is finished i call setupViewPager. Just put mTLContent.setupWithViewPager(mVPContent); to method where you get data response

[Den]

Well, this is not my case I guess. I need to init fragments from the start and show progress bars in every field till the data received.

[MKovac]

You can show progress bar until you don't receive data. I hope someone will have some other solution for you :)

[Den]

Nope, my fragment is already running and I don't want to reinit it

[hetsgandhi]

Thank you.It works in my case and saved much of my time!

[Pinkesh Darji]

Thanks a lot. You saved my hours.

[Masterpiece Mas Icang]

how to assign AboutCompanyViewModel from activity?

[Den]

@MasterpieceMasIcang you just call your interface method and pass it.

[Shivam Kumar]

@Den Can you tell me how to set data from activity with example

[Vishal Thakkar]

@Den in my case i have to fragment in view pager and i have to pass that data in both fragment i was implemented this but it pass data in second fragment not in first fragment

[Mr.Drew]

Does this break when the fragment gets replaced or destroyed?

[M. H.]

This code is working only if the fragment from the same activity .. if you change the activity this line will no longer be useful:- mActivity = (ManagementCompanyOverviewActivity) getActivity();

[Den]

What if your Fragment is used in another Activity? You always should use interfaces to re-use your code.

[Adnan Bashir]

You are 100% right but we are talking about data passing from activity to fragment , definitely if you need data in other activity which is not in running state then you must use Interfaces

[Den]

Anyway, in my original post the case is the activity receives some data from the internet and this activity should send this data to fragments, getters will not help in this case.

[Rajneesh Shukla]

Hi, The new solution of this question is. If you are using MVVM then use a shared viewModel. Thanks!