Android Explicit Intent Example

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Basics of Android

Android Explicit Intent Example

Explicit intent specifies the component that is which class to be invoked. We can pass the information from one activity to another using explicit intent.
Here, we are going to see an example to call one activity from another and vice-versa.

Android calling one activity from another activity example

Let's see the simple example of android explicit example that calls one activity from another and vice versa.

activity_main.xml

File: activity_main.xml
<RelativeLayout 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"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/Button01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/TextView01"
        android:layout_marginLeft="65dp"
        android:layout_marginTop="38dp"
        android:onClick="onClick"
        android:text="Call second activity" />

    <TextView
        android:id="@+id/TextView01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/Button01"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="18dp"
        android:layout_marginTop="27dp"
        android:minHeight="60dip"
        android:text="First Activity"
        android:textSize="20sp" />

</RelativeLayout>

activitytwo_main.xml

File: activitytwo_main.xml
<RelativeLayout 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"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/Button01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/TextView01"
        android:layout_marginLeft="65dp"
        android:layout_marginTop="38dp"
        android:onClick="onClick"
        android:text="Call First activity" />

    <TextView
        android:id="@+id/TextView01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/Button01"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="18dp"
        android:layout_marginTop="27dp"
        android:minHeight="60dip"
        android:text="Second Activity"
        android:textSize="20sp" />

</RelativeLayout>

ActivityOne class

File: MainActivityOne.java
package com.example.explicitintent2;

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

public class ActivityOne extends Activity {
   
 /** Called when the activity is first created. */

   @Override
   public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);
     
        Button button1=(Button)findViewById(R.id.Button01);
     
     button1.setOnClickListener(new OnClickListener(){
      public void onClick(View view) {
       Intent i = new Intent(getApplicationContext(), ActivityTwo.class);
       i.putExtra("Value1", "Android By Javatpoint");
       i.putExtra("Value2", "Simple Tutorial");
       // Set the request code to any code you like, you can identify the
       // callback via this code
       startActivity(i);
      }
      });

   }

     
 }

ActivityTwo class

File: MainActivityTwo.java
package com.example.explicitintent2;

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;
import android.widget.TextView;
import android.widget.Toast;

public class ActivityTwo extends Activity {

  
/** Called when the activity is first created. */

  @Override
  public void onCreate(Bundle bundle) {
    super.onCreate(bundle);
    
    TextView tv=new TextView(this);
    tv.setText("second activity");
    setContentView(R.layout.activity_two);
    
    Bundle extras = getIntent().getExtras();
    String value1 = extras.getString("Value1");
    String value2 = extras.getString("Value2");
    
    Toast.makeText(getApplicationContext(),"Values are:\n First value: "+value1+
         "\n Second Value: "+value2,Toast.LENGTH_LONG).show();
    
    Button button1=(Button)findViewById(R.id.Button01);
    
    button1.setOnClickListener(new OnClickListener(){
     public void onClick(View view) {
         Intent i = new Intent(getApplicationContext(), ActivityOne.class);
         startActivity(i);
       }
    });
  }
}


Output:








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