How to send data from an activity to its parent fragment?

Question

I have a main activity, inside which there is a fragment with an image view. When this image view is clicked, a new activity starts which contains a list view. I want to return the position(index) the user clicks on this list view, back to the fragment.

Fragment Code

package com.example.kedee.testgradle;


import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;


/**
 * A simple {@link Fragment} subclass.
 */
public class ASKFragment extends Fragment implements View.OnClickListener{
    private Context context;
    private View rootView;
    private int pos;

    public ASKFragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        rootView= inflater.inflate(R.layout.fragment_ask, container, false);
        context=inflater.getContext();
        setListeners();
        return  rootView;
    }

    void setListeners(){
        ImageView catIcon=(ImageView)rootView.findViewById(R.id.cat_icon);
        catIcon.setOnClickListener(this);



    }

    @Override
    public void onClick(View v) {
        int vID=v.getId();
        if(vID==R.id.cat_icon){
            Intent intent=new Intent(getActivity(),ASK.class);
            getActivity().startActivity(intent);
        }

    }
}

Code of Activity which is getting called from this fragment. (ASK activity)

package com.example.kedee.testgradle;

import android.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class ASK extends AppCompatActivity {
    private int index;
    private String[] catNames= {"Acad","Emer","Tech","Exam","Station","Finance","Medical","Place","Sports" ,
            "Others" };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ask);
        ListView listView=(ListView)findViewById(R.id.ask_cat_listView);
        listView.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_multiple_choice,catNames));
        listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
            public void onItemClick(AdapterView<?> listView, View v, int pos, long id){
                index=pos;
                //code to return back this index to the parent fragment?
            }
        });
    }


}

@HassanUsman NO! `startActivityForResult` is the appropriate use case here — David Medenjak, Mar 05 '16 at 10:11

Deepak Goyal · Answer 1 · 2016-03-05T11:22:28.793

use startActivityForResult

1. in ASKFragment

Intent intent=new Intent(getActivity(),ASK.class);
getActivity().startActivityForResult(intent, 22 /* any other request code you want */);

2. Pass position with intent.

listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
            public void onItemClick(AdapterView<?> listView, View v, int pos, long id){
                index=pos;
                Intent i = new Intent();
                i.putExtra("position", index);
                setResult(RESULT_OK, i);
                finish();
            }
        });

3. The activity from where you are adding or replacing fragment.

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 22 && resultCode == RESULT_OK) {
            // get the position from intent
            if(data.getExtras()!=null && data.hasExtra("position")){
               int position = data.getExtras().getInt("position");
               // pass this position to fragment.
            }
        }
    }

EDIT
Send the value from Activity to fragment.
1) create function in fragment

public void getPositionOfList(int position){
   // here is the position
}

2) from Activity calling the fragment method.

if (requestCode == 22 && resultCode == RESULT_OK) {
                // get the position from intent
                if(data.getExtras()!=null && data.hasExtra("position")){
                   int position = data.getExtras().getInt("position");
                   // pass this position to fragment.
                   ((ASKFragment)fragmentManager.findFragmentById(/*id of your container*/)).getPositionOfList(position);
                }
            }

Thanks, this helped :) but here the index is known to the activity holding fragment. How to make ASKFragment know about the index value ?? @Deepak — Sumit Sagar, Mar 05 '16 at 10:43
Yeah, i did it the same way :) Thanks a lot for helping me :) — Sumit Sagar, Mar 05 '16 at 13:04

score 0 · Answer 2 · answered Mar 05 '16 at 10:13

0

You can achieve this by calling/starting new activity having listview

by replacing startActivity to startActivityForResult

and further send any data back to calling activity accordingly. Then, handle it with onActivityResult.

answered Mar 05 '16 at 10:13

UMESH0492

1,701
18
31

score 0 · Answer 3 · answered Mar 05 '16 at 10:20

you have to Use OnActivityResult like below

In Main Activity In which you have Fragments you have to write like this

  @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode,resultCode,data);
    Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.viewpager);
    fragment.onActivityResult(requestCode, resultCode, data);
}

Then in your Fragment in which you want result you have to write like below

 @Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {


    if(resultCode == getActivity().RESULT_OK) {

        switch(requestCode) {

            case REQUEST_PICK_FILE:

                if(data.hasExtra(FilePicker.EXTRA_FILE_PATH)) {

                    selectedFile = new File
                            (data.getStringExtra(FilePicker.EXTRA_FILE_PATH));
                    tvFile.setText(selectedFile.getPath());

                }
                break;
        }
    }
}

And you have to put this code on which click you want to open Activity

        Intent intent = new Intent(getActivity(), FilePicker.class);
    startActivityForResult(intent, REQUEST_PICK_FILE);

How to send data from an activity to its parent fragment?

3 Answers3