Contoh Intent Eksplisit Android

Android Explicit intent menentukan komponen yang akan dipanggil dari aktivitas. Dengan kata lain, kita dapat memanggil activity lain di android dengan maksud eksplisit.
Kita juga dapat meneruskan informasi dari satu activity ke activity lainnya menggunakan Intent eksplisit.
Di sini, kita akan melihat contoh untuk memanggil satu activity dari yang lain dan sebaliknya.

Android memanggil satu activity dari contoh activity lain

Mari kita lihat contoh sederhana dari contoh eksplisit android yang memanggil satu aktivitas dari yang lain dan sebaliknya.

* Main Activity 1

File : activity_main.xml

<?xml version="1.0" encoding="utf-8"?>  
<android.support.constraint.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="example.android.com.explicitintent.FirstActivity">  
 
    <TextView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_marginEnd="8dp"  
        android:layout_marginStart="8dp"  
        android:layout_marginTop="8dp"  
        android:text="First Activity"  
        app:layout_constraintBottom_toBottomOf="parent"  
        app:layout_constraintEnd_toEndOf="parent"  
        app:layout_constraintHorizontal_bias="0.454"  
        app:layout_constraintLeft_toLeftOf="parent"  
        app:layout_constraintRight_toRightOf="parent"  
        app:layout_constraintStart_toStartOf="parent"  
        app:layout_constraintTop_toTopOf="parent"  
        app:layout_constraintVertical_bias="0.06" />  
 
    <Button  
        android:id="@+id/button"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_marginEnd="8dp"  
        android:layout_marginStart="8dp"  
        android:layout_marginTop="392dp"  
        android:onClick="callSecondActivity"  
        android:text="Call second activity"  
        app:layout_constraintEnd_toEndOf="parent"  
        app:layout_constraintStart_toStartOf="parent"  
        app:layout_constraintTop_toTopOf="parent" />  
 
</android.support.constraint.ConstraintLayout>  

* Activity class 1

File : MainActivityOne.java

package example.android.com.explicitintent;  
 
import android.content.Intent;  
import android.support.v7.app.AppCompatActivity;  
import android.os.Bundle;  
import android.view.View;  
 
public class FirstActivity extends AppCompatActivity {  
 
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_first);  
    }  
    public void callSecondActivity(View view){  
        Intent i = new Intent(getApplicationContext(), SecondActivity.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);  
    }  
 
}  

* Main Activity 2

File : activitytwo_main.xml

<?xml version="1.0" encoding="utf-8"?>  
<android.support.constraint.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="example.android.com.explicitintent.SecondActivity">  
 
    <TextView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_marginEnd="8dp"  
        android:layout_marginStart="8dp"  
        android:layout_marginTop="8dp"  
        android:text="Second Activity"  
        app:layout_constraintBottom_toBottomOf="parent"  
        app:layout_constraintEnd_toEndOf="parent"  
        app:layout_constraintHorizontal_bias="0.454"  
        app:layout_constraintLeft_toLeftOf="parent"  
        app:layout_constraintRight_toRightOf="parent"  
        app:layout_constraintStart_toStartOf="parent"  
        app:layout_constraintTop_toTopOf="parent"  
        app:layout_constraintVertical_bias="0.06" />  
 
    <Button  
        android:id="@+id/button"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_marginEnd="8dp"  
        android:layout_marginStart="8dp"  
        android:layout_marginTop="392dp"  
        android:onClick="callFirstActivity"  
        android:text="Call first activity"  
        app:layout_constraintEnd_toEndOf="parent"  
        app:layout_constraintStart_toStartOf="parent"  
        app:layout_constraintTop_toTopOf="parent" />  
</android.support.constraint.ConstraintLayout>  

* Activity class 2

File : MainActivityTwo.java

package example.android.com.explicitintent;  
 
import android.content.Intent;  
import android.support.v7.app.AppCompatActivity;  
import android.os.Bundle;  
import android.view.View;  
import android.widget.Toast;  
 
public class SecondActivity extends AppCompatActivity {  
 
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_second);  
        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();  
    }  
    public void callFirstActivity(View view){  
        Intent i = new Intent(getApplicationContext(), FirstActivity.class);  
        startActivity(i);  
    }  
 
}  

Output :

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