Android bundle to pass data between activities?

This example demonstrates how to pass data between activities.
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"?>
<androidx.constraintlayout.widget.ConstraintLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   tools:context=".MainActivity">
   <LinearLayout
      android:layout_width = "match_parent"
      android:layout_height = "wrap_content"
      android:gravity = "center_horizontal"
      android:orientation = "vertical"
      tools:ignore="MissingConstraints">
      <EditText
         android:id = "@+id/etName"
         android:layout_width = "match_parent"
         android:layout_height = "wrap_content"
         android:ems = "10"
         android:hint = "Enter a name"
         android:inputType = "text" />
      <EditText
         android:id = "@+id/etPhone"
         android:layout_width = "match_parent"
         android:layout_height = "wrap_content"
         android:ems = "10"
         android:hint = "Enter a Phone number"
         android:inputType = "number"/>
      <Button
         android:layout_width = "wrap_content"
         android:layout_height = "wrap_content"
         android:text = "Send data"
         android:id = "@+id/btnSend"/>
   </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
Step 3  − Add the following code to res/layout/activity_second.xml.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:orientation="vertical"
   android:layout_width="match_parent"
   android:layout_height="match_parent">
   <LinearLayout
      android:layout_width = "match_parent"
      android:layout_height = "wrap_content"
      android:gravity = "center_horizontal"
      android:orientation = "vertical"
      tools:ignore="MissingConstraints">
      <TextView
         android:id="@+id/tvData"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:gravity="center"
         android:textSize="20sp" />
   </LinearLayout>
</LinearLayout>
Step 4  − Add the following code to src/MainActivity.java
package com.example.sample;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity {
   EditText etName;
   EditText etPhone;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      etName = findViewById(R.id.etName);
      etPhone = findViewById(R.id.etPhone);
      Button btnSend = findViewById(R.id.btnSend);
      btnSend.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            if (TextUtils.isEmpty(etName.getText().toString()) &&
            TextUtils.isEmpty(etPhone.getText().toString())) {
               Toast.makeText(MainActivity.this,"Something is wrong kindly
               check",Toast.LENGTH_LONG).show();
            } else {
               sendUserData(etName.getText().toString(),etPhone.getText().toString());
            }
         }
      });
   }
   private void sendUserData(String username, String userPhone) {
      Userinfo userinfo = new Userinfo();
      userinfo.setName(username);
      userinfo.setPhone(userPhone);
      Intent send = new Intent(MainActivity.this,SecondActivity.class);
      Bundle b = new Bundle();
      b.putSerializable("serialzable",userinfo);
      send.putExtras(b);
      startActivity(send);
   }
}
Step 5  − Add the following code to src/SecondActivity.java
package com.example.sample;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class SecondActivity extends AppCompatActivity {
   Userinfo userinfo;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_second);
      TextView tvData = findViewById(R.id.tvData);
      userinfo = (Userinfo) getIntent().getSerializableExtra("serialzable");
      String name = userinfo.getName();
      String phone = userinfo.getPhone();
      tvData.setText("Your entered name is "+name+" number is "+phone);
   }
   @Override
   protected void onPause() {
      super.onPause();
      userinfo = null;
   }
}
Step 6  − Add the following code to src/Userinfo.java
package com.example.sample;
import java.io.Serializable;
class Userinfo implements Serializable {
   String name;
   String phone;
   public String getName() {
      return name;
   }
   public void setName(String name) {
      this.name = name;
   }
   public String getPhone() {
      return phone;
   }
   public void setPhone(String phone) {
      this.phone = phone;
   }
}
Step 7  − Add the following code to Manifests/AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:dist="http://schemas.android.com/apk/distribution"
   package="com.example.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
      <activity android:name=".SecondActivity"></activity>
   </application>
   <dist:module dist:instant="true" />
</manifest>
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 –
Click here to download the project code.