Transfer data from one Activity to Another Activity in Android

Transfer data with Intents :

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We can easily transfer data from one activity to another activity with the use of Intents in Android Application. In this example I am sending the name (set in edit text) from one activity and will use that name in another activity.

Create a new project in Eclipse : File => New => Android Application Project and give the package name as com.javalanguageprogramming.datatransferfromactivitydemo.

Copy the code in activity_main.xml shown below :

 <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:orientation="vertical"  
   android:background="#ced3e2"  
    >  
   
   <LinearLayout  
     android:layout_width="wrap_content"  
     android:layout_height="wrap_content"  
     android:orientation="horizontal" >  
   
     <TextView  
       android:layout_width="wrap_content"  
       android:layout_height="wrap_content"  
       android:layout_marginLeft="20dp"  
       android:layout_marginTop="10dp"  
       android:text="Your Name"  
       android:textSize="18sp" />  
   
     <EditText  
       android:id="@+id/nameEdit"  
       android:layout_width="180dp"  
       android:layout_height="40dp"  
       android:layout_marginLeft="20dp"  
       android:layout_marginTop="10dp" />  
   </LinearLayout>  
   
   <Button  
     android:id="@+id/sendButton"  
     android:layout_width="100dp"  
     android:layout_height="wrap_content"  
     android:layout_gravity="center"  
     android:layout_marginTop="10dp"  
     android:text="Send" />  
   
 </LinearLayout>  

In the above xml file a text view is used to give the label “your name” and edit text is used for entering the name and a button is used to send the name to another activity.

Copy the code in activity_receive_data.xml shown below :

 <?xml version="1.0" encoding="utf-8"?>  
   
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
   android:layout_width="match_parent"  
   android:layout_height="match_parent"  
   android:orientation="vertical"  
   android:background="#ced3e2"  
    >  
   
   <TextView  
     android:layout_width="wrap_content"  
     android:layout_height="wrap_content"  
     android:layout_gravity="center"  
     android:layout_marginTop="30dp"  
     android:gravity="center"  
     android:text="Hey!"  
     android:textSize="23sp" />  
   
   <TextView  
     android:id="@+id/nameText"  
     android:layout_width="wrap_content"  
     android:layout_height="wrap_content"  
     android:layout_gravity="center"  
     android:layout_marginTop="10dp"  
     android:gravity="center"  
     android:textSize="25sp"  
     android:textStyle="bold" />  
   
   <TextView  
     android:layout_width="wrap_content"  
     android:layout_height="wrap_content"  
     android:layout_gravity="center"  
     android:layout_marginTop="10dp"  
     android:gravity="center"  
     android:text="Welcome to"  
     android:textSize="23sp" />  
   
   <TextView  
     android:layout_width="wrap_content"  
     android:layout_height="wrap_content"  
     android:layout_gravity="center"  
     android:layout_marginTop="10dp"  
     android:gravity="center"  
     android:text="http://javalanguageprogramming.blogspot.in"  
     android:textSize="20sp" />  
   
 </LinearLayout>  

In the above code 4 text views are used, out of one is used for the name which is coming from MainActivity.

Copy the code in MainActivity.java shown below :

 package com.javalanguageprogramming.datatransferfromactivitydemo;  
   
 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;  
 import android.widget.EditText;  
   
   
 public class MainActivity extends Activity {  
   
      EditText name;  
      Button send;  
        
      @Override  
      protected void onCreate(Bundle savedInstanceState) {  
           super.onCreate(savedInstanceState);  
           setContentView(R.layout.activity_main);  
             
           //initialize variables  
           name = (EditText)findViewById(R.id.nameEdit);  
           send = (Button)findViewById(R.id.sendButton);  
             
           //set on click listener on button  
           send.setOnClickListener(new OnClickListener() {  
                  
                @Override  
                public void onClick(View v) {  
                     // check if the edit text is empty or not  
                     if(name.getText() != null || !name.getText().equals("")){  
                          //make an intent  
                          Intent intent = new Intent(MainActivity.this, ReceiveDataActivity.class);  
                          //put data in intent  
                          intent.putExtra("NAME", name.getText().toString());  
                          //clear the edit text so that after user come back he will again enter text  
                          name.setText("");  
                          //start another activity  
                          startActivity(intent);  
                     }  
                }  
           });  
      }  
 }  
   

In this activity, putExtra method of Intent type is used to send the data from this activity to another activity.

Copy the code of ReceiveDataActivity.java shown below :

 package com.javalanguageprogramming.datatransferfromactivitydemo;  
   
 import android.app.Activity;  
 import android.content.Intent;  
 import android.os.Bundle;  
 import android.widget.TextView;  
   
   
 public class ReceiveDataActivity extends Activity{  
   
      TextView nameText;  
      @Override  
      protected void onCreate(Bundle savedInstanceState) {  
           // TODO Auto-generated method stub  
           super.onCreate(savedInstanceState);  
           setContentView(R.layout.activity_receive_data);  
             
           //initialize text view  
           nameText = (TextView)findViewById(R.id.nameText);  
             
           //get the intent  
           Intent intent = getIntent();  
           //get the name with the use of intent  
           String name = intent.getStringExtra("NAME");  
             
           //set the text view  
           nameText.setText(name);  
      }  
   
 }  
   

In this activity, getStringExtra method of intent type is used to receive data in this activity that came from previous activity.

Do not forget to add ReceiveDataActivity in AndroidManifest. The code of AndroidManifest is shown below :

 <?xml version="1.0" encoding="utf-8"?>  
   
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"  
   package="com.javalanguageprogramming.datatransferfromactivitydemo"  
   android:versionCode="1"  
   android:versionName="1.0" >  
   
   <uses-sdk  
     android:minSdkVersion="8"  
     android:targetSdkVersion="19" />  
   
   <application  
     android:allowBackup="true"  
     android:icon="@drawable/ic_launcher"  
     android:label="@string/app_name"  
     android:theme="@style/AppTheme" >  
     <activity  
       android:name="com.javalanguageprogramming.datatransferfromactivitydemo.MainActivity"  
       android:label="@string/app_name" >  
       <intent-filter>  
         <action android:name="android.intent.action.MAIN" />  
   
         <category android:name="android.intent.category.LAUNCHER" />  
       </intent-filter>  
     </activity>  
     <activity  
       android:name="com.javalanguageprogramming.datatransferfromactivitydemo.ReceiveDataActivity"  
       android:label="@string/app_name" >  
         
     </activity>  
   </application>  
   
 </manifest>