How to pass data from one fragment to another fragment in android?

This example demonstrate about How to pass data from one fragment to another fragment in android

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version = "1.0" encoding = "utf-8"?>
<LinearLayout xmlns:android = "https://schemas.android.com/apk/res/android"
   android:orientation = "vertical"
   android:layout_width = "match_parent"
   android:layout_height = "match_parent">
   <LinearLayout
      android:id = "@+id/linearlayout01"
      android:layout_width = "fill_parent"
      android:layout_height = "fill_parent"
      android:background = "#ccc"
      android:layout_weight = "1"
      android:orientation = "vertical">
      <fragment android:name = "com.example.myapplication.FirstFragment"
         android:id = "@+id/frag_1"
         android:layout_width = "fill_parent"
         android:layout_height = "fill_parent" />
   </LinearLayout>
   <LinearLayout
      android:id = "@+id/linearlayout02"
      android:layout_width = "fill_parent"
      android:layout_height = "fill_parent"
      android:layout_weight = "1"
      android:background = "#eee"
      android:orientation = "vertical">
      <fragment android:name = "com.example.myapplication.SecondFragment"
         android:id = "@+id/frag_2"
         android:layout_width = "fill_parent"
         android:layout_height = "fill_parent" />
   </LinearLayout>
</LinearLayout>

In the above code, we have taken fragments to pass the data between two fragments.

Step 3 − Add the following code to src /MainActivity.java

<?xml version = "1.0" encoding = "utf-8"?>
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity implements OnButtonPressListener {
   @Override
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
   }
   @Override
   public void onButtonPressed(String msg) {
      // TODO Auto-generated method stub
      SecondFragment Obj = (SecondFragment) getSupportFragmentManager().findFragmentById(R.id.frag_2);
      Obj.onFragmentInteraction(msg);
   }
}

Step 4 − Add the following code to src / FirstFragment.java

<?xml version = "1.0" encoding = "utf-8"?>
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class FirstFragment extends Fragment{
   @Override
   public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
      ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment, null);
      init(root);
      return root;
   }
   OnButtonPressListener buttonListener;
   @Override
   public void onAttach(Activity activity) {
      super.onAttach(activity);
      try {
         buttonListener = (OnButtonPressListener) getActivity();
      } catch (ClassCastException e) {
         throw new ClassCastException(activity.toString() + " must implement onButtonPressed");
      }
   }
   void init(ViewGroup root) {
      TextView but = (TextView)root.findViewById(R.id.text);
      but.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            // TODO Auto-generated method stub
            buttonListener.onButtonPressed("Message From First Fragment");
         }
      });
   }
}

Step 5 − Add the following code to src / SecondFragment.java

<?xml version = "1.0" encoding = "utf-8"?>
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class SecondFragment extends Fragment {
   TextView textView;
   View view;
   @Nullable
   @Override
   public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
      view = inflater.inflate(R.layout.fragment, container, false);
      return view;
   }
   public void onFragmentInteraction(String uri) {
      Log.d("sai",uri);
      textView = view.findViewById(R.id.text);
      textView.setText(uri);
   }
}

Step 6 − Add the following code to res/layout/ fragment.xml.

<?xml version = "1.0" encoding = "utf-8"?>
<LinearLayout
   xmlns:android = "https://schemas.android.com/apk/res/android"
   android:layout_width = "match_parent"
   android:gravity = "center"
   android:layout_height = "match_parent">
   <TextView
      android:id = "@+id/text"
      android:textSize = "30sp"
      android:text = "Click"
      android:layout_width = "wrap_content"
      android:layout_height = "wrap_content" />
</LinearLayout>

Step 7 − Add the following code to src/ OnButtonPressListener.java.

<?xml version = "1.0" encoding = "utf-8"?>
public interface OnButtonPressListener {
   public void onButtonPressed(String msg);
}

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –

Now click on first fragment text view, it will show the result as shown below –