Send data from activity to fragment in android

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Send data from activity to fragment in android

In this example We learn how to send two string from Activity to fragment.

Android recommends to use newInstance.

In the activity:

FirstFragment fragment = FirstFragment.newInstance("Param One","Param Two");

In the fragment:

    public static FirstFragment newInstance(String param1, String param2) {
        FirstFragment fragment = new FirstFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }


From Activity you send data with intent as:

public class MainActivity extends AppCompatActivity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
 
    public void goToFragment(View view) {
        FirstFragment fragment = FirstFragment.newInstance("Param One","Param Two");
 
        replaceFragment(fragment, "FirstFragment");
        view.setVisibility(View.GONE);
    }
 
 
 
    public void replaceFragment(Fragment fragment, String tag) {
 
        try {
 
            FragmentManager fragmentManager = getSupportFragmentManager();
            fragmentManager.beginTransaction().replace(R.id.content_main, fragment, tag).commit();
 
        } catch (Exception e) {
            Log.d(TAG, e.toString());
        }
 
    }
}

and in Fragment onCreateView method:

public class FirstFragment extends Fragment {
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";
 
    private String mParam1;
    private String mParam2;
 
    public FirstFragment() {
        // Required empty public constructor
    }
 
    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment FirstFragment.
     */
    public static FirstFragment newInstance(String param1, String param2) {
        FirstFragment fragment = new FirstFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }
 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view = inflater.inflate(R.layout.fragment_first, container, false);
        TextView textView1 = (TextView) view.findViewById(R.id.fragment_first_param_one);
        TextView textView2 = (TextView) view.findViewById(R.id.fragment_first_param_two);
 
        textView1.setText(mParam1);
        textView2.setText(mParam2);
 
        return view;
    }
 
    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
    }
 
    @Override
    public void onDetach() {
        super.onDetach();
    }
 
}

fragment_first.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.javier.activitytofragment.FirstFragment">
 
    <TextView
        android:id="@+id/fragment_first_param_one"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:text="@string/hello_blank_fragment" />
 
    <TextView
        android:id="@+id/fragment_first_param_two"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_below="@+id/fragment_first_param_one"
        android:text="@string/hello_blank_fragment" />
 
</RelativeLayout>

contentent_main.xml(This content has the fragment)

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/content_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
 
</RelativeLayout>

content_activity.xml (This content has the activity)

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
 
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:onClick="goToFragment" />
 
</RelativeLayout>

activity_main.xml(this layout has the contents)

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.javier.activitytofragment.MainActivity">
 
    <include layout="@layout/content_activity" />
    <include layout="@layout/content_main" />
</RelativeLayout>

14 thoughts on “Send data from activity to fragment in android

  1. Hello! With your code, my app have a error:
    “Unreachable code”
    there is a conflict between:
    return inflater.inflate(R.layout.fragment_name, container, false);
    and my code:
    return fragmentView;
    can help me?
    Thank you!

  2. hello can i know how to pass data from activity to fragments..
    I searched and tried but i am getting null pointer exception, please help me out

  3. I am using async task and passing Jsonobject from activity to fragment, i tried using bundle but it is throwing exception.

  4. In Fragment.java file add the following code,

    public static String name= null;
    public void setName(String string){
    name = string;}

    In MainActivity.java from which you want to send String add the following code,

    String stringYouWantToSend;
    Fragment fragment = new Fragment();
    fragment.setName(stringYouWantToSend);

  5. Pingback: Communicating between fragment and activity • The Developer World Is Yours

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