Data Passing

1) Activity to Activity / Fragment to diff Activity

ActivityA.java

            String mname = name.getText().toString();
            String mplace = place.getText().toString();
            String mrollno = rollno.getText().toString();
            int finalroll = Integer.parseInt(mrollno);

            Intent intent = new Intent(BundlePassingActivity.this, SecondActivity.class);
            intent.putExtra("Name", mname);
            intent.putExtra("Place", mplace);
            intent.putExtra("Roll no", finalroll);
            startActivity(intent);

ActivityB.java

Intent getData = getIntent();
String Name = getData.getStringExtra("Name");
String Place = getData.getStringExtra("Place");
int Rollno = getData.getIntExtra("Roll no",0);

name.setText("Name: " + Name);
place.setText("Place: " + Place);
rollno.setText("Roll no: " + Rollno);

2) Activity to Fragment

Activity.java

submit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {

        String mname = name.getText().toString();
        String mplace = place.getText().toString();
        int mrollno = Integer.parseInt(rollno.getText().toString());

        Bundle bundle = new Bundle();
        bundle.putString("Name", mname);
        bundle.putString("Place", mplace);
        bundle.putInt("RollNo", mrollno);

        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        SecondFragment secondFragment = new SecondFragment();
        secondFragment.setArguments(bundle);

        fragmentTransaction.replace(R.id.container, secondFragment);
        fragmentTransaction.commit();
    }
});

Fragment.java

Bundle bundle = getArguments();
name.setText(bundle.getString("Name"));
place.setText(bundle.getString("Place"));
rollno.setText("" + bundle.getInt("RollNo"));

3) Fragment to Activity(Same)

Fragment.java

submit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {

        String mname = name.getText().toString();
        String mplace = place.getText().toString();
        int mrollno = Integer.parseInt(rollno.getText().toString());

        DataSharingActivity dataSharingActivity = (DataSharingActivity) getActivity();
        dataSharingActivity.myData(mname, mplace, mrollno);
    }
});

Activity.java

public void myData(String mname, String mplace, int mrollno) {
    name.setText(mname);
    place.setText(mplace);
    rollno.setText("" + mrollno);
}

4) Fragment to Fragment

FragmentA.java

submit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        String mname = name.getText().toString();
        String mplace = place.getText().toString();
        int mrollno = Integer.parseInt(rollno.getText().toString());

        Bundle bundle = new Bundle();
        bundle.putString("Name", mname);
        bundle.putString("Place", mplace);
        bundle.putInt("RollNo", mrollno);

        FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        SecondFragment secondFragment = new SecondFragment();
        secondFragment.setArguments(bundle);

        fragmentTransaction.replace(R.id.container, secondFragment);
        fragmentTransaction.commit();

    }
});

FragmentB.java

Bundle bundle = getArguments();
name.setText(bundle.getString("Name"));
place.setText(bundle.getString("Place"));
rollno.setText("" + bundle.getInt("RollNo"));