How to pass large data between activities in Android?

AndroidApps/ApplicationsMobile Development

This example demonstrate about How to pass large data between activities 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 = "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:layout_margin = "16dp"
   android:orientation = "vertical"
   tools:context = ".MainActivity">
   <EditText
      android:id = "@+id/etName"
      android:layout_width = "match_parent"
      android:layout_height = "wrap_content"
      android:layout_gravity = "center"
      android:hint = "Name"
      android:inputType = "textCapWords" />
   <EditText
      android:id = "@+id/etAge"
      android:layout_width = "match_parent"
      android:layout_height = "wrap_content"
      android:layout_gravity = "center"
      android:hint = "Age"
      android:inputType = "number" />
   <EditText
      android:id = "@+id/etCity"
      android:layout_width = "match_parent"
      android:layout_height = "wrap_content"
      android:layout_gravity = "center"
      android:hint = "City"
      android:inputType = "textCapWords" />
   <Button
      android:id = "@+id/button"
      android:layout_width = "match_parent"
      android:layout_height = "wrap_content"
      android:layout_gravity = "center"
      android:layout_marginTop = "16dp"
      android:text = "Next" />
</LinearLayout>

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

package com.example.myapplication;
import java.io.Serializable;
public class User implements Serializable {
   private String city;
   private String name;
   private String age;
   User(String name, String age, String city) {
      super();
      this.name = name;
      this.age = age;
      this.city = city;
   }
   public String getCity() {
      return city;
   }
   public void setCity(String city) {
      this.city = city;
   }
   public String getName() {
      return name;
   }
   public void setName(String name) {
      this.name = name;
   }
   public String getAge() {
      return age;
   }
   public void setAge(String age) {
      this.age = age;
   }
}

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

package com.example.myapplication;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
   EditText etName, etAge, etCity;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      etName = findViewById(R.id.etName);
      etAge = findViewById(R.id.etAge);
      etCity = findViewById(R.id.etCity);
      Button button = findViewById(R.id.button);
      button.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            String name = etName.getText().toString().trim();
            String age = etAge.getText().toString().trim();
            String city = etCity.getText().toString().trim();
            ArrayList<User> userList = new ArrayList<>();
            userList.add(new User(name, age, city));
            Bundle bundle = new Bundle();
            bundle.putSerializable("myUser", userList);
            Intent intent = new Intent(MainActivity.this, SecondActivity.class);
            intent.putExtras(bundle);
            startActivity(intent);
         }
      });
   }
}

Step 5 − 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:layout_width = "match_parent"
   android:layout_height = "match_parent"
   android:layout_margin = "16dp"
   android:orientation = "vertical"
   tools:context = ".SecondActivity">
   <TextView
      android:id = "@+id/textView"
      android:layout_width = "match_parent"
      android:layout_height = "wrap_content" />
</LinearLayout>

Step 6 − Add the following code to src/SecondActivity.java

package com.example.myapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;
import java.util.ArrayList;

public class SecondActivity extends AppCompatActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_second);
      Bundle bundle = getIntent().getExtras();
      if (bundle ! = null) {
         ArrayList<User> userList = (ArrayList<User>) bundle.getSerializable("myUser");
         if (userList ! = null) {
            String name = userList.get(0).getName();
            String age = userList.get(0).getAge();
            String city = userList.get(0).getCity();
            TextView tvName = findViewById(R.id.textView);
            String user = "Name: " + name + "\nAge: " + age + "\nCity: " + city;
            tvName.setText(user);
         }
      }
   }
}

Step 7 − Add the following code to androidManifest.xml

<?xml version = "1.0" encoding = "utf-8"?>
<manifest xmlns:android = "http://schemas.android.com/apk/res/android"
   package = "com.example.myapplication">
   <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>
</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

raja
Published on 16-Apr-2019 09:39:18
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