How to pass data between fragment in viewpager?

Question

There is a tabLayout and ViewPager. So I want to pass data from fragment1 to fragment2.

NOTE: fragment1 vs fragment2 lies in VIewPager. So I can't pass data follow normal ways.

FragmentTransaction fragmentTx=this.FragmentManager.BeginTransaction();
            TracksByGenres fragTrack=new TracksByGenres();
            fragTrack.AddData(items[e.Position]);
            //get our item from listview

            fragmentTx.Replace(Resource.Id.fragmentContainer,fragTrack);    
            fragmentTx.AddToBackStack(null);
            fragmentTx.Commit();

Answer 1

Use sharedPreferences

SharedPreferences sharedpreferences;
public static final String MyPREFERENCES = "MyPrefs" ;
sharedpreferences = getSharedPreferences(MyPREFERENCES, Context.MODE_PRIVATE);

Save value

SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putString("TAG_NAME", "value");
editor.commit();

Retrieve data from preference: In Second fragment

public static final String MyPREFERENCES = "MyPrefs" ;
SharedPreferences prefs = getSharedPreferences(MyPREFERENCES , MODE_PRIVATE); 
String restoredText = prefs.getString("TAG_NAME", null);

Answer 2

This is an old question and all above answers are valid.This is 2019 and Android have changed a lot since Android Architecture Components

If you are using Android JetPack than you can add an Observer on a Live Data in your Host Activity class and listen for changes in Fragment class

Create a Singleton repo to hold live data

/**
 * Data Class Live Data
 */
class Repository private constructor() {


    private var currentProgress: MutableLiveData<Float> = MutableLiveData()

    fun getLiveProgress(): MutableLiveData<Float> {
        return currentProgress
    }

    companion object {

        private val mInstance: Repository =
                Repository()

        @Synchronized
        fun getInstance(): Repository {
            return mInstance
        }
    }
}

Set Live data anywhere from Activity or Fragment class class

  viewPager.addOnPageChangeListener(object : ViewPager.OnPageChangeListener {
            override fun onPageScrollStateChanged(state: Int) {
            }

            override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
                headMotionScene.progress = positionOffset
                Repository.getInstance().getLiveProgress().value = positionOffset
            }

            override fun onPageSelected(position: Int) {
            }

        })

Observe change in data from your Fragment/ Service class

    Repository.getInstance().getLiveProgress().observe(this, Observer<Float> {
        motionLayout.progress = it
    })