In this video, it shows how to create assets folder in your Android Studio environment. Assets folder can be used to keep assets, such as image files, which can be used in the App development using the getAssets method.

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Complete source code and other details:

package com.programmerworld.assetsdirectoryapp;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.widget.ImageView;

import java.io.IOException;
import java.io.InputStream;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ImageView imageView = findViewById(R.id.imageView);
        try {
            InputStream inputStream = getAssets().open("flower.jpg");
            Bitmap bitmapImage = BitmapFactory.decodeStream(inputStream);
            imageView.setImageBitmap(bitmapImage);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

<?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">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="321dp"
        android:layout_height="322dp"
        android:layout_marginStart="45dp"
        android:layout_marginTop="79dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/ic_launcher_background" />
</androidx.constraintlayout.widget.ConstraintLayout>