how to back pressed button programmatically in android

In this article today learn on back button pressed android finish activity. I know that one can overwrite the Back Button functionality in Android, but I was wondering if there was a method or anything I could call that would functionally do the same thing as pressing the hardware button.and on back button pressed android finish activity.

Follow the Example of how to back pressed button programmatically in android. for the More Information visit:https://stackoverflow.com/questions/10718789/how-to-press-back-button-in-android-programmatically

1.MainActivity.java:

package com.akash.backpressed;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

public class MainActivity extends AppCompatActivity {

Button click;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        click=(Button)findViewById(R.id.click);

        click.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Intent i =new Intent(MainActivity.this,Second_Activity.class);

                startActivity(i);

            }

        });

    }

}

2.activity_main.xml:

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

<androidx.constraintlayout.widget.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=".MainActivity">

    <Button

        android:id="@+id/click"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Click"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintLeft_toLeftOf="parent"

        app:layout_constraintRight_toRightOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

3.Second_Activity.java:

package com.akash.backpressed;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.view.KeyEvent;

public class Second_Activity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_second_);

    }

    @Override

    public void onBackPressed() {

        //this is only needed if you have specific things

        //that you want to do when the user presses the back button.

        /* your specific things...*/

        super.onBackPressed();

        finish();

    }

}

4.activity_second_.xml:

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

<androidx.constraintlayout.widget.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=".Second_Activity">

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text=" Second Activity"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintLeft_toLeftOf="parent"

        app:layout_constraintRight_toRightOf="parent"

        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

5.AndroidManifest.xml:

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

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

    package="com.akash.backpressed">

    <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=".Second_Activity"></activity>

        <activity android:name=".MainActivity">

            <intent-filter>

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

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

            </intent-filter>

        </activity>

    </application>

</manifest>

6.Output: