Android passing an Object between two activities

In this blog we’ll see how we can pass user defined data from one activity to other. Let us say we have a user defined class Employee having two attributes id and name. In order to enable us to pass object of Employee from 1 activity to other the Student class needs to implement the interface called Parcelable. This interface is for classes whose instances can be written to and restored from a Parcel.

Make a project Named AndroidPassingObject and have a main activity with the name ActivityOne .java

ActivityOne.java


package com.jitesh.androidpassingobject;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class ActivityOne extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button button = (Button) findViewById(R.id.btn);
        button.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub

                Intent intent = new Intent(ActivityOne.this,ActivityTwo.class);
                Bundle b = new Bundle();
                Student e = new Student(1, "Jitesh Upadhyay");
                b.putParcelable("parse", e);
                intent.putExtras(b);
                startActivity(intent);
            }
        });
    }
}

Student .java

package com.jitesh.androidpassingobject;

import android.os.Parcel;

import android.os.Parcelable;

public class Student implements Parcelable {

int id;

String name;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Student(int id, String name) {

super();

this.id = id;

this.name = name;

}

 

    public int describeContents() {

        // TODO Auto-generated method stub

        return 1;

    }

 

    public void writeToParcel(Parcel dest, int flags) {

        // TODO Auto-generated method stub

        dest.writeInt(id);

        dest.writeString(name);

 

    }

 

    public Student(Parcel source) {

        // TODO Auto-generated method stub

        id = source.readInt();

        name = source.readString();

 

    }

 

    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {

 

      

        public Student createFromParcel(Parcel source) {

            // TODO Auto-generated method stub

            return new Student(source);

        }

 

        public Student[] newArray(int size) {

            // TODO Auto-generated method stub

            return new Student[size];

        }

    };

 

}

ActivityTwo .java

package com.jitesh.androidpassingobject;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.widget.TextView;

 

public class ActivityTwo extends Activity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity2);

        TextView textView = (TextView) findViewById(R.id.txt);

        Intent intent = getIntent();

        Bundle b = intent.getExtras();

        Student e = b.getParcelable("parse");

 

        textView.setText(e.getId() + ":" + e.getName());

    }

 

}

main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<Button 

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="Pass Data"

    android:id="@+id/btn"

    />

</LinearLayout>

activity2.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:orientation="vertical"

  android:layout_width="match_parent"

  android:layout_height="match_parent">

  <TextView

   

   android:layout_width="match_parent"

  android:layout_height="match_parent"

  android:id="@+id/txt"

   />

     

</LinearLayout>

androidmanifest

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.jitesh.androidpassingobject"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="15" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".ActivityOne"

            android:label="@string/title_activity_activity_one" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

            <activity android:name="ActivityTwo"></activity>

        

    </application>

</manifest>

Download the source code from the link AndroidPassinObject