pass value from activity to fragment using bundle in tabbed activity

Question

I am a java-illiterate, and still trying to develop a app for my personal use. I have started with android-studio\'s \"Tabbed-Activity\", and mostly unaltered except a fragment

Answer 1

This way you can pass data from your mainActivity to fragment

MainActivity onCreate method

     adapter = new Adapter(getChildFragmentManager());

     SquadsTeamListFragment  teamA =                
        SquadsTeamListFragment.newInstance(teamAData,teamBData
        adapter.addFragment(teamA, teamAName);
        viewPager.setAdapter(adapter);
        tabLayout.setupWithViewPager(viewPager);

use this adapter in your main activity

 static class Adapter extends FragmentStatePagerAdapter {
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();

    Adapter(FragmentManager manager) {
        super(manager);
    }
    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }
    @Override
    public int getCount() {
        return mFragmentList.size();
    }
    void addFragment(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }
    @Override
    public CharSequence getPageTitle(int position){
        return mFragmentTitleList.get(position);
     }
  }

receive data to fragment (SquadsTeamListFragment .java)

   public static SquadsTeamListFragment newInstance(String playerList, String   
  oppPlayerList) {
    SquadsTeamListFragment fragment = new SquadsTeamListFragment();
    Bundle args = new Bundle();
    args.putString(ARG_TEAM_DATA, playerList);
    args.putString(ARG_OPP_TEAM_DATA, oppPlayerList);

    fragment.setArguments(args);
    return fragment;
}
   @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (getArguments() != null) {
        playerList = getArguments().getString(ARG_TEAM_DATA);
        oppPlayerList = getArguments().getString(ARG_OPP_TEAM_DATA);

    }
}

Answer 2

In your MainActivity, your sunFragment is unused. Remove this part:

/*Bundle bundle = new Bundle();
bundle.putDouble("loclat", 25.4358);
bundle.putDouble("loclang",81.8463);
Fragment SunFragment = new SunFragment();
SunFragment.setArguments(bundle);*/

You have to set bundle to fragment inside your SectionsPagerAdapter

case 0:
    Bundle bundle = new Bundle();
    bundle.putDouble("loclat", 25.4358);
    bundle.putDouble("loclang",81.8463);

    Fragment sunFragment = new SunFragment();
    sunFragment.setArguments(bundle);

    return sunFragment;

But if you need to set the bundle to fragment from MainActivity. Then use a callback in that purpose.